Ronald J Jones

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• Jones, R. J. (2020). See my CV (3 journal 5 conference). yes.
• Lecaplain, C., Zhang, Y. u., Weeks, R., Yeak, J., Harilal, S. S., Phillips, M. C., & Jones, R. J. (2019). Time-Resolved Dual Frequency Comb Spectroscopy for Broadband Multi-Species Detection in Laser-Induced Plasmas. 2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Phillips, M. C., Bernacki, B. E., Harilal, S. S., Yeak, J., & Jones, R. J. (2019). Standoff 250 m Open-path Detection of Chemical Plumes Using a Broadband Swept-ECQCL. 2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Rhoades, R. T., Lecaplain, C., Schunemann, P. G., & Jones, R. J. (2019). Dual-comb laser system for time-resolved studies of fireballs in the MIR. 2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Rockmore, R., Laurain, A., Moloney, J. V., & Jones, R. J. (2019). Offset-free mid-infrared frequency comb based on a mode-locked semiconductor laser. OPTICS LETTERS, 44(7), 1797-1800.
• Rockmore, R., Laurain, A., Moloney, J. V., & Jones, R. J. (2019). VECSEL-based frequency comb in the MIR. VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) IX, 10901.
• Weeks, R., Zhang, Y. u., Lecaplain, C., Yeak, J., Harilal, S. S., Phillips, M. C., & Jones, R. J. (2019). Time-Resolved Dual Frequency Comb Phase Spectroscopy of Laser-Induced Plasmas. 2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Zhang, Y. u., Lecaplain, C., Weeks, R., Yeak, J., Harilal, S. S., Phillips, M. C., & Jones, R. J. (2019). Characterization of a Laser-Induced Plasma Using Time-Resolved Dual-Frequency-Comb Spectroscopy. 2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Zhang, Y. u., Lecaplain, C., Weeks, R., Yeak, J., Harilal, S. S., Phillips, M. C., & Jones, R. J. (2019). Time-resolved dual-comb measurement of number density and temperature in a laser-induced plasma. OPTICS LETTERS, 44(14), 3458-3461.
• Bergevin, J., Wu, T., Yeak, J., Brumfield, B. E., Harilal, S. S., Phillips, M. C., & Jones, R. J. (2018). Dual-comb spectroscopy of laser-induced plasmas. NATURE COMMUNICATIONS, 9.
• Laurain, A., Rockmore, R., Kilen, I., Baker, C., Scheller, M., Addamane, S., Balakrishnan, G., Jones, R. J., Koch, S. W., & Moloney, J. V. (2018). VECSEL platform for single/dual frequency CW operation and ultrashort pulse generation. 2018 IEEE INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC), 101-102.
• Rockmore, R., Baker, C. W., Laurain, A., Wu, T., Jones, R. J., & Moloney, J. V. (2018). Supercontinuum generation and beatnote detection using ultrafast VECSEL seed oscillators. VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) VIII, 10515.
• Rockmore, R., Laurain, A., Moloney, J. V., & Jones, R. J. (2018). VECSEL-Based Offset-Free Frequency Comb in the MIR. 2018 IEEE INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC), 203-204.
• Baker, C. W., Scheller, M., Laurain, A., Ruiz-Perez, A., Stolz, W., Addamane, S., Balakrishnan, G., Koch, S. W., Jones, R. J., & Moloney, J. V. (2017). Multi-Angle VECSEL Cavities for Dispersion Control and Peak-Power Scaling. IEEE PHOTONICS TECHNOLOGY LETTERS, 29(3), 326-329.
• Baker, C., Scheller, M., Laurain, A., Yang, H., Perez, A. R., Stolz, W., Addamane, S. J., Balakrishnan, G., Jones, R. J., & Moloney, J. V. (2017). Multi-angle VECSEL cavities for dispersion control and multi-color operation. VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) VII, 10087.
• Bergevin, J., Wu, T., Yeak, J., Brumfield, B. E., Harilal, S. S., Phillips, M. C., & Jones, R. J. (2017). Dual-Comb Spectroscopy of Laser-Induced Plasmas. 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Scheller, M., Baker, C. W., Koch, S. W., Moloney, J. V., & Jones, R. J. (2017). High Power Dual-Wavelength VECSEL Based on a Multiple Folded Cavity. IEEE PHOTONICS TECHNOLOGY LETTERS, 29(10), 790-793.
• Baker, C., Scheller, M., Yang, H., Koch, S. W., Jones, R. J., Moloney, J. V., Perez, A. R., Stolz, W., Addamane, S., & Balakrishnan, G. (2016). Ultrafast characterization of semiconductor gain and absorber devices for mode-locked VECSELs. VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) VI, 9734.
• Baker, C., Scheller, M., Koch, S. W., Perez, A. R., Stolz, W., Jones, R. J., & Moloney, J. V. (2015). In situ probing of mode-locked vertical-external-cavity-surface-emitting lasers. OPTICS LETTERS, 40(23), 5459-5462.
• Carlson, D. R., Wu, T., & Jones, R. J. (2015). Dual-comb femtosecond enhancement cavity for precision measurements of plasma dynamics and spectroscopy in the XUV. 2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Scheller, M., Baker, C. W., Gbele, K., Koch, S. W., Jones, R. J., & Moloney, J. V. (2015). Ultrafast in-situ probing of passively mode-locked VECSEL dynamics. VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) V, 9349.
• Chia, J. T., Martin, S. E., Carlson, D. R., Jones, R. J., & Wright, E. M. (2013). Operating characteristics of a femtosecond amplification cavity for infrared frequency combs. PHYSICAL REVIEW A, 87(2).
• Paul, J. R., Lytle, C. R., Kaneda, Y., Moloney, J., Wang, T., & Jones, R. J. (2013). Optically pumped external-cavity semiconductor lasers for precision spectroscopy and laser cooling of atomic Hg. VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) III, 8606.
• Kolesik, M., Wright, E. M., Andreasen, J., Brown, J. M., Carlson, D. R., & Jones, R. J. (2012). Space-time resolved simulation of femtosecond nonlinear light-matter interactions using a holistic quantum atomic model: Application to near-threshold harmonics. OPTICS EXPRESS, 20(14), 16113-16128.
• Carlson, D. R., Lee, J., Mongelli, J., Wright, E. M., & Jones, R. J. (2011). Intracavity ionization and pulse formation in femtosecond enhancement cavities. OPTICS LETTERS, 36(15), 2991-2993.
• Carlson, D., Lee, J., Mongelli, J., Wright, E., & Jones, R. J. (2011). VUV Frequency Combs and Fundamental Limits of Intracavity HHG Due to Ionization Dynamics. 2011 IEEE PHOTONICS CONFERENCE (PHO), 835-836.
• Lee, J., Carlson, D. R., & Jones, R. J. (2011). Optimizing intracavity high harmonic generation for XUV fs frequency combs. OPTICS EXPRESS, 19(23), 23315-23326.
• Lee, J., Carlson, D. R., & Jones, R. J. (2011). Optimizing intracavity high harmonic generation for XUV fs frequency combs. Optics Express, 19(23), 23315-23326.
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  PMID: 22109209;Abstract: Previous work has shown that use of a passive enhancement cavity designed for ultrashort pulses can enable the up-conversion of the fs frequency comb into the extreme ultraviolet (XUV) spectral region utilizing the highly nonlinear process of high harmonic generation. This promising approach for an efficient source of highly coherent light in this difficult to reach spectral region promises to be a unique tool for precision spectroscopy and temporally resolved measurements. Yet to date, this approach has not been extensively utilized due in part to the low powers so far achieved and in part due to the challenges in directly probing electronic transitions with the frequency comb itself. We report on a dramatically improved XUV frequency comb producing record power levels to date in the 50-150nm spectral region based on intracavity high harmonic generation. We measure up to 77 μW at the 11th harmonic of the fundamental (72nm) with μW levels down to the 15th harmonic (53nm). Phase-matching and related design considerations unique to intracavity high harmonic generation are discussed, guided by numerical simulations which provide insight into the role played by intracavity ionization dynamics. We further propose and analyze dual-comb spectroscopy in the XUV and show that the power levels reported here permit this approach for the first time. Dual-comb spectroscopy in this physically rich spectral region promises to enable the study of a significantly broader range of atomic and molecular spectra with unprecedented precision and accuracy. © 2011 Optical Society of America.
• Paul, J., Kaneda, Y., Wang, T., Lytle, C., Moloney, J. V., & Jones, R. J. (2011). Doppler-free spectroscopy of mercury at 253.7 nm using a high-power, frequency-quadrupled, optically pumped external-cavity semiconductor laser. OPTICS LETTERS, 36(1), 61-63.
• Wu, T., Kieu, K., Peyghambarian, N., & Jones, R. J. (2011). Low noise erbium fiber fs frequency comb based on a tapered-fiber carbon nanotube design. OPTICS EXPRESS, 19(6), 5313-5318.
• Jones, R. J. (2010). Quantum optics: Enhanced quantum light generation. Nature Photonics, 4(3), 138-140.
• Kieu, K., Jones, R. J., & Peyghambarian, N. (2010). Generation of Few-Cycle Pulses From an Amplified Carbon Nanotube Mode-Locked Fiber Laser System. IEEE PHOTONICS TECHNOLOGY LETTERS, 22(20), 1521-1523.
• Kieu, K., Jones, R. J., & Peyghambarian, N. (2010). High power femtosecond source near 1 micron based on an all-fiber Er-doped mode-locked laser. OPTICS EXPRESS, 18(20), 21350-21355.
• Lee, J., Paul, J., & Jones, R. J. (2010). High power femtosecond frequency comb for intracavity high harmonic generation. Optics InfoBase Conference Papers.
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  Abstract: Abstract: We report on a high power (~6.5 Watts) Ti:sapphire based frequency comb (50MHz) generating ~25 microjoule pulses inside an enhancement cavity. Intracavity high-harmonic generation produces over 2.5 microwatts integrated power from 73 to 53 nm. © 2010 Optical Society of America.
• Lee, J., Paul, J., & Jones, R. J. (2010). High power femtosecond laser system for intracavity high harmonic generation. Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference: 2010 Laser Science to Photonic Applications, CLEO/QELS 2010.
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  Abstract: We report on a high power (>6.5 Watts) Ti:sapphire based frequency comb producing -25 uJ pulses at 50MHz inside a fs enhancement cavity. The system is used to generate intracavity high harmonics below 62 nm. © 2010 Optical Society of America.
• Lee, J., Paul, J., & Jones, R. J. (2010). High power femtosecond laser system for intracavity high harmonic generation. Optics InfoBase Conference Papers.
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  Abstract: We report on a high power (>6.5 Watts) Ti:sapphire based frequency comb producing ~25 μJ pulses at 50MHz inside a fs enhancement cavity. The system is used to generate intracavity high harmonics below 62 nm.
• Mansuripur, M., Zakharian, A. R., Lesuffleur, A., Oh, S., Jones, R. J., Lindquist, N. C., Im, H., Kobyakov, A., & Moloney, J. V. (2009). Plasmonic nano-structures for optical data storage. OPTICS EXPRESS, 17(16), 14001-14014.
• Paul, J., Johnson, J., Lee, J., & Jones, R. J. (2008). Generation of high-power frequency combs from injection-locked femtosecond amplification cavities. Optics Letters, 33(21), 2482-2484.
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  PMID: 18978894;Abstract: We demonstrate a scalable approach for the generation of high average power femtosecond (fs) pulse trains from Ti:sapphire by optically injection locking a resonant amplification cavity. We generate up to 7 W average power with over 30% optical extraction efficiency in a 68 fs pulse train operating at 95 MHz. This master oscillator power amplifier approach allows independent optimization of the fs laser while enabling efficient amplification to high average powers. The technique also enables coherent synchronization among multiple fs laser sources. © 2008 Optical Society of America.
• Paul, J., Johnson, J., Lee, J., & Jones, R. J. (2008). High average power fs frequency comb from an optically injection locked amplification cavity. 2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro-Optics, CLEO/QELS.
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  Abstract: We demonstrate a scalable approach for the generation of high average power fs pulse trains by optically injection locking an amplification cavity. Initial results generated 4.7 Watts average power and 70 fs pulses. © 2008 Optical Society of America.
• Jones, R. J., Moll, K., Thorpe, M., & Jun, Y. e. (2007). High-harmonic generation at 100 mhz repetition frequency using a femtosecond enhancement cavity. Springer Series in Optical Sciences, 132, 59-64.
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  Abstract: High-harmonic generation (HHG) [1],[2] provides a coherent source of vacuum ultraviolet (VUV) to soft X-ray radiation in a relatively compact system. Since its first observations [3],[4], HHG has relied on high-energy, low repetition rate laser systems to provide the peak intensities needed for ionization of the gas target. The small conversion efficiency of the process, combined with the low repetition rate of amplified laser systems, results in low average powers in the VUV generation. Experiments trying to utilize these sources therefore often suffer from poor signal-to-noise levels, resulting in long data-acquisition times. Furthermore, the use of these sources as precision spectroscopic tools remains limited in comparison with sources in the visible. Ramsey-type spectroscopy has been utilized to improve spectral resolution in the VUV [5],[6] but remains orders of magnitude away from the precision measurement capability available with fs laser based frequency combs in the optical and IR [7],[8]. This is due to the fact that the original frequency comb structure of the laser is lost in the HHG process from the reduction of the pulse train repetition rate required to actively amplify single pulses to the needed energies/intensities. © 2007 Springer-Verlag New York.
• Jones, R. J., Moll, K. D., Thorpe, M. J., & Jun, Y. (2006). 100 MHz frequency combs in the XUV spectral region. Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, CLEO/QELS 2006.
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  Abstract: High-harmonic generation is achieved at 100 MHz repetition rates by utilizing a femtosecond enhancement cavity to increase peak intensities from a mode-locked laser. This provides a coherent frequency comb in the VUV for high-resolution spectroscopy. © 2005 Optical Society of America.
• Moll, K. D., Jones, R. J., & Jun, Y. e. (2006). Output coupling methods for cavity-based high-harmonic generation. Optics Express, 14(18), 8189-8197.
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  PMID: 19529192;Abstract: We have investigated the coupling efficiency and cavity loss associated with a ring cavity that has a hole in one of the focusing mirrors. The aperture provides a means through which intracavity high-harmonic generation can be coupled from the cavity. By studying different cavity geometries and input modes we have found that the integration of phase-plates on the focusing mirrors provides the best performance in terms of input coupling efficiency, cavity loss, and output-coupling of the generated high harmonic light. © 2006 Optical Society of America.
• Thorpe, M. J., Moll, K. D., Jones, J. R., Safdi, B., & Jun, Y. e. (2006). Broadband cavity ringdown spectroscopy for sensitive and rapid molecular defection. Science, 311(5767), 1595-1599.
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  PMID: 16543457;Abstract: We demonstrate highly efficient cavity ringdown spectroscopy in which a broad-bandwidth optical frequency comb is coherently coupled to a high-finesse optical cavity that acts as the sample chamber. 125,000 optical comb components, each coupled into a specific longitudinal cavity mode, undergo ringdown decays when the cavity input is shut off. Sensitive intracavity absorption information is simultaneously available across 100 nanometers in the visible and near-infrared spectral regions. Real-time, quantitative measurements were made of the trace presence, the transition strengths and linewidths, and the population redistributions due to collisions and the temperature changes for molecules such as C2H2, O2, H2O, and NH3.
• Anscombe, M. P., Hauri, C. P., Biegert, J., Keller, U., & Jones, R. J. (2005). CEO fringe stability measurement from ultra-broadband pulses produced by filamentation. Conference on Lasers and Electro-Optics Europe - Technical Digest.
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  Abstract: The technique of generating short pulses using filaments was studied to examine the benefits to CEO (carrier envelope offset) phase control of using the intense, octave-spanning spectrum directly for single shot f-2f spectral interferometry. © 2005 IEEE.
• Hudson, D. D., Holman, K. W., Jones, R. J., Cundiff, S. T., Jun, Y. e., & Jones, D. J. (2005). Mode-locked fiber laser frequency-controlled with an intracavity electro-optic modulator. Optics Letters, 30(21), 2948-2950.
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  PMID: 16279478;Abstract: We demonstrate a mode-locked, erbium-doped fiber laser with its repetition frequency synchronized to a second fiber laser via an intracavity electro-optic modulator (EOM). With servo control from the EOM (bandwidth ∼230 kHz) and a slower speed intracavity piezoelectric transducer (resonance at ∼20 kHz), we demonstrate stabilization of the repetition frequency with an in-loop rms timing jitter of 10 fs, integrated over a bandwidth from 1 Hz to 100 kHz. This represents what is to our knowledge the first time an EOM has been introduced inside a mode-locked laser cavity for fast servo action and the lowest timing jitter reported for a mode-locked fiber laser. © 2005 Optical Society of America.
• Jones, R. J., Ido, T., Loftus, T., Boyd, M., Ludlow, A., Holman, K., Thorpe, M., Moll, K., & Ye, J. (2005). Stabilized femtosecond lasers for precision frequency metrology and ultrafast science. Laser Physics, 15(7), 1010-1013.
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  Abstract: We present results from several experiments in which the repetitive, coherent nature of stabilized mode-locked pulse trains are utilized. From absolute optical frequency measurements in ultracold Sr atoms to the coherent storage and amplification of optical pulse trains in high-finesse Fabry-Perot cavities, the stabilized femtosecond laser has become an indispensable tool in precision spectroscopy and ultrafast science. Copyright © 2005 by Astro, Ltd.
• Jones, R. J., Moll, K. D., Thorpe, M. J., & Jun, Y. e. (2005). Phase-coherent frequency combs in the vacuum ultraviolet via high-harmonic generation inside a femtosecond enhancement cavity. Physical Review Letters, 94(19).
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  Abstract: We demonstrate the generation of phase-coherent frequency combs in the vacuum utraviolet spectral region. The output from a mode-locked laser is stabilized to a femtosecond enhancement cavity with a gas jet at the intracavity focus. The resulting high-peak power of the intracavity pulse enables efficient high-harmonic generation by utilizing the full repetition rate of the laser. Optical-heterodyne-based measurements reveal that the coherent frequency comb structure of the original laser is fully preserved in the high-harmonic generation process. These results open the door for precision frequency metrology at extreme ultraviolet wavelengths and permit the efficient generation of phase-coherent high-order harmonics using only a standard laser oscillator without active amplification of single pulses. © 2005 The American Physical Society.
• Moll, K. D., Jones, R. J., & Jun, Y. e. (2005). Nonlinear dynamics inside femtosecond enhancement cavities. Optics Express, 13(5), 1672-1678.
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  PMID: 19495044;Abstract: We have investigated the effect of intracavity nonlinear dynamics arising from enhanced peak powers of femtosecond pulses inside broad-bandwidth, dispersion-controlled, high-finesse optical cavities. We find that for χ(3) nonlinearities, when a train of femtosecond pulses are maximally coupled into a cavity by active stabilization of its frequency comb to the corresponding linear resonances of a cavity, enhancement ceases when the peak nonlinear phase shift is sufficient to shift the cavity resonance frequencies by more than a cavity linewidth. In addition, we study and account for the complex spectral dynamics that result from chirping the input pulse and show excellent qualitative agreement with experimental results. © 2005 Optical Society of America.
• Thorpe, M. J., Jones, R. J., Moll, K. D., Jun, Y. e., & Lalezari, R. (2005). Precise measurements of optical cavity dispersion and mirror coating properties via femtosecond combs. Optics Express, 13(3), 882-888.
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  PMID: 19494950;Abstract: We precisely determine the dispersion of an optical cavity over a large spectral bandwidth using a broadband optical comb generated by a femtosecond laser. This approach permits the effective characterization of the next generation of mirrors that will offer high reflectivity, minimal absorption/scattering loss, and well-defined dispersion characteristics. Such mirrors are essential for constructing passive, high-finesse cavities capable of storing and enhancing ultrashort pulses and for exploring novel intracavity-based experiments in atomic and molecular spectroscopy and extreme nonlinear optics. We characterize both zero and negative group-delay-dispersion mirrors and compare their performance against the targeted coating design. The high sensitivity of this approach is demonstrated with a precise determination of the group-delay dispersion of air inside a 40-cm long optical cavity, demonstrating an accuracy better than 1 fs2. © 2005 Optical Society of America.
• Ye, J., Jones, R. J., Stowe, M., Thorpe, M. J., Moll, K. D., Marian, A., Foreman, S. M., Notcutt, M., & Ludlow, A. (2005). Phase coherent manipulation of light: From precision spectroscopy to extreme nonlinear optics. LEOS Summer Topical Meeting, 2005, 1-2.
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  Abstract: Phase control of wide-bandwidth optical frequency combs enables amazing capabilities in optical frequency measurement and synthesis, optical atomic clocks, united time-frequency spectroscopy, coherent pulse synthesis and manipulation, and deterministic studies in sub-cycle physics. © 2005 IEEE.
• Holman, K. W., Jones, D. J., Jones, R. J., & Jun, Y. e. (2004). Frequency transfer of optical standards through a fiber network using 1550-nm mode-locked sources. Springer Series in Chemical Physics, 79, 834-836.
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  Abstract: A 1.5-μm mode-locked laser source phase locked to an optical atomic clock is used to transfer precise optical/radio frequency signals over a fiber network with ultrahigh stability. Active stabilization of the transfer medium is demonstrated as well.
• Jones, R. J., & Jun, Y. e. (2004). High-repetition-rate coherent femtosecond pulse amplification with an external passive optical cavity. Optics Letters, 29(23), 2812-2814.
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  PMID: 15605514;Abstract: We demonstrate a general technique for enhancement of femtosecond pulses from a pulse train through their coherent buildup inside a high-finesse cavity. Periodic extraction of the intracavity pulse by means of a fast switch provides a net energy gain of 42 to >70 times for 38-58-fs pulse durations. Starting with an actively stabilized but otherwise standard mode-locked laser system, we demonstrate pulses of >200-nJ energy. © 2004 Optical Society of America.
• Jones, R. J., Holman, K. W., Thomann, I., & Jun, Y. e. (2004). Precise stabilization of a femtosecond laser comb to a high finesse, passive optical cavity. OSA Trends in Optics and Photonics Series, 96 A, 359-360.
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  Abstract: We report on direct stabilization of a femtosecond comb to a stable optical cavity with an analysis of various stabilization schemes. An absolute fractional frequency instability of
• Jones, R. J., Ma, L., & Jun, Y. e. (2004). Coherent amplification of femtosecond pulses with passive enhancement-cavities. Springer Series in Chemical Physics, 79, 16-18.
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  Abstract: We demonstrate a general technique for amplification of femtosecond pulses through coherent buildup in an external cavity. A net single-pulse energy gain of 42 to more than 70 times for 38 to 58 fs pulse durations, respectively, is achieved. This technique offers a flexible approach to enhance the energy of fs pulses while maintaining relatively high repetition rates.
• Jones, R. J., Thomann, I., & Jun, Y. e. (2004). Precision stabilization of femtosecond lasers to high-finesse optical cavities. Physical Review A - Atomic, Molecular, and Optical Physics, 69(5 A), 051803-1-051803-4.
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  Abstract: The frequency stability of a high finesse reference cavity was transferred to the entire femtosecond comb using a single error signal from the cavity. The signal was sent through a loop filter and fed back to a piezoelectric transducer attached to an end mirror of the laser for the control of the laser cavity length. The beat signals were characterized in terms of the resulting linewidth and the frequency stability. Using an independent stable continuous wave laser, it was verified that the linewidth and stability of the optical comb components, reach below 300 Hz and 5×10 -14 at 1 s averaging time.
• Holman, K. W., Jones, R. J., Marian, A., Cundiff, S. T., & Jun, Y. e. (2003). Detailed Studies and Control of Intensity-Related Dynamics of Femtosecond Frequency Combs from Mode-Locked Ti:Sapphire Lasers. IEEE Journal on Selected Topics in Quantum Electronics, 9(4), 1018-1024.
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  Abstract: The authors have conducted detailed experimental investigations of the intensity-related dynamics of the pulse repetition and carrier-envelope offset frequencies of passively mode-locked Ti:sapphire lasers. Two different laser systems utilizing different intracavity dispersion compensation schemes are used in this study. Theoretical interpretations agree well with experimental data, indicating that intensity-related spectral shifts, coupled with the cavity group-delay dispersion, are important in understanding the dynamics of the frequency comb. Minimization of spectral shifts or the magnitude of group-delay dispersion leads to minimization of the intensity dependence of the femtosecond comb.
• Holman, K. W., Jones, R. J., Marian, A., Cundiff, S. T., & Jun, Y. e. (2003). Intensity-related dynamics of femtosecond frequency combs. OSA Trends in Optics and Photonics Series, 88, 1908-1910.
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  Abstract: The intensity-related dynamics of the pulse repetition and carrier-envelope offset frequencies of passively mode-locked Ti:sapphire lasers have been studied, confirming a strong dependence on the intensity-related spectral shift and revealing techniques to minimize linewidth. © 2002 Optical Society of America.
• Holman, K. W., Jones, R. J., Marian, A., Cundiff, S. T., & Jun, Y. e. (2003). Intensity-related dynamics of femtosecond frequency combs. Optics Letters, 28(10), 851-853.
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  PMID: 12779168;Abstract: We have performed systematic studies of intensity-related dynamics of the pulse repetition and carrier-envelope offset frequencies in mode-locked Ti:sapphire lasers. We compared the results for two laser systems that have different intracavity dispersion-compensation schemes. We found that the carrier-envelope phase noise and its dynamic response depend critically on the mode-locking conditions. An intensity-related shift of the laser spectrum was found to be instrumental in interpretations. © 2003 Optical Society of America.
• Jones, R. J., Jun, Y. e., Potma, E., & Xie, X. S. (2003). Passive optical amplifier for picosecond and femtosecond pulses. Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series, 89, JTuD5/1-JTuD5/3.
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  Abstract: The coherent superposition of mode-locked pulses stored in a passive optical cavity results in a single amplified pulse when switched out. Theoretical and experimental results demonstrate superior performance when compared with active cavity dumping techniques. ©2002 Optical Society of America.
• Jones, R. J., Jun, Y. e., Potma, E., & Xie, X. S. (2003). Passive optical amplifier for picosecond and femtosecond pulses. OSA Trends in Optics and Photonics Series, 88, 935-937.
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  Abstract: The coherent superposition of mode-locked pulses stored in a passive optical cavity results in a single amplified pulse when switched out. Theoretical and experimental results demonstrate superior performance when compared with active cavity dumping techniques. © 2002 Optical Society of America.
• Jun, Y. e., Jones, D. J., Jones, R. J., Holman, K., & Foreman, S. (2003). Precise phase control of short pulses. Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series, 89, JTuC2/1.
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  Abstract: The strong impact of precision phase control of optical pulses to fields ranging from ultrafast science to precision metrology is discussed. As such, the development of ultra-stable optical frequency standards into optical atomic clocks and optical frequency synthesizers compliment and rival the similar technologies developed in the radio frequency domain, with the help of a precision and wide bandwidth optical frequency comb, absolute optical frequency measurements are carried out with ease.
• Jun, Y. e., Jones, D. J., Jones, R. J., Holman, K., & Foreman, S. (2003). Precise phase control of short pulses. OSA Trends in Optics and Photonics Series, 88, 919-.
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  Abstract: We will discuss the strong impact of precision phase control of optical pulses to fields ranging from ultrafast science to precision metrology. © 2003 Optical Society of America.
• Jun, Y. e., Peng, J., Jones, R. J., Holman, K. W., Hall, J. L., Jones, D. J., Diddams, S. A., Kitching, J., Bize, S., Bergquist, J. C., Hollberg, L. W., Robertsson, L., & Ma, L. (2003). Delivery of high-stability optical and microwave frequency standards over an optical fiber network. Journal of the Optical Society of America B: Optical Physics, 20(7), 1459-1467.
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  Abstract: Optical and radio frequency standards located in JILA and National Institute of Standards and Technology (NIST) laboratories have been connected through a 3.45-km optical fiber link. An optical frequency standard based on an iodine-stabilized Nd:YAG laser at 1064 nm (with an instability of ∼4 × 10-14 at 1 s) has been transferred from JILA to NIST and simultaneously measured in both laboratories. In parallel, a hydrogen maser-based radio frequency standard (with an instability of ∼2.4 × 10-13 at 1 s) is transferred from NIST to JILA. Comparison between these frequency standards is made possible by the use of femtosecond frequency combs in both laboratories. The degradation of the optical and rf standards that are due to the instability in the transmission channel has been measured. Active noise cancellation is demonstrated to improve the transfer stability of the fiber link. © 2003 Optical Society of America.
• Potma, E. O., Evans, C., Xie, X. S., Jones, R. J., & Jun, Y. e. (2003). Picosecond-pulse amplification with an external passive optical cavity. Optics Letters, 28(19), 1835-1837.
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  PMID: 14514117;Abstract: The amplification of picosecond pulses at high repetition rates was demonstrated through the coherent addition of successive pulses of a mode-locked train. Amplification greater than 30 times was obtained at a repetition rate of 253 kHz, boosting the 5.3-nJ pulses from a commercial mode-locked picosecond Ti:sapphire laser to pulse energies of more than 150 nJ. It was found that with proper dispersion compensation the current approach can be extended into the sub-20-fs regime.
• Arissian, L., Jones, J., & Diels, J. (2002). Stabilization of mode-locked trains, and dark resonance of two-photon lambda-level structures. Journal of Modern Optics, 49(14-15), 2517-2533.
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  Abstract: Our ultimate objective is to design a combined frequency standard for optical as well as radio frequencies. A mode-locked laser provides frequency components that can be used as a ruler to measure any unknown optical source through direct beating. The frequency spacing of a pair of teeth of this comb is in itself a radio frequency reference. Fast control and correction for both the average frequency and the repetition rate of a mode-locked Ti:sapphire laser are achieved by locking the laser to a reference cavity of ultra-low expansion quartz with equal mode spacing. We measure an optical frequency with a mean square deviation of 700 Hz, instability limited by the radio-frequency sources used to count the repetition rate. As a reference standard to achieve absolute accuracy, we use the Λ transition 5S1/2(F = 1) → 5D5/2(F = 3) → 5S1/2(F = 2) of rubidium. The theory for this coherent interaction shows that, with one mode resonant with the two-photon 5S1/2(F = 1) → 5D5/2(F = 3) transition, the fluorescence goes through a resonance for a change in repetition rate of less than 10kHz. These results suggest that, by locking to the peak of that resonant feature, optical stability and absolute accuracy better than 1 kHz can easily be achieved.
• Arissian, L., Mukherjee, N., Jones, R. J., & Diels, J. (2002). Four photon coherent interaction applied to long term stabilization of a femtosecond clock. Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series, 74, 54-55.
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  Abstract: For accuracy and long term stabilizatioin, one should define the RF frequency from a division of the optical frequency, and control the drift of the reference cavity with an atomic standard. As such, a new approach to stabilize both repetition rate and zero-offset of the comb by locking the average frequency to a two-photon resonance of a rubidium transition, and the repetition rate to a dark line resonance is presented.
• Jones, R. J., & Jun, Y. e. (2002). Femtosecond pulse amplification by coherent addition in a passive optical cavity. Optics Letters, 27(20), 1848-1850.
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  PMID: 18033383;Abstract: By simultaneously controlling repetition and carrier frequencies, one can achieve the phase coherent super-position of a collection of successive pulses from a mode-locked laser. An optical Cavity can be used for coherent delay and constructive interference of sequential pulses until a cavity dump is enabled to switch out the amplified pulse. This approach will lead to an effective amplification process through decimation of the original pulse rate while the overall coherence from the oscillator is preserved. Detailed calculations show the limiting effects of intracavity dispersion and indicate that enhancement of sub-100-fs pulses to microjoule energies is experimentally feasible. © 2002 Optical Society of America.
• Jones, R. J., Arissian, L., & Diels, J. (2002). Optical frequency measurements with a reference cavity stabilized femtosecond laser for improved short term stability. Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest, 603-604.
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  Abstract: Optical frequency measurements with a reference cavity stabilized femtosecond laser for improved short term stability were discussed. The system was applied for an accurate measurement of the dispersion of air at 800 nm. The modes of the reference cavity were measured by locking a cw laser to various longitudinal modes of the reference cavity. By taking the difference of measurements between the fs comb and reference cavity spacing in vacuum and in air, the group velocity dispersion of air at 780 nm was found to be 0.2 fs2/cm.
• Jones, R. J., Cheng, W. -., Holman, K. W., Chen, L., Hall, J. L., & Ye, J. (2002). Absolute-frequency measurement of the iodine-based length standard at 514.67 nm. Applied Physics B: Lasers and Optics, 74(6), 597-601.
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  Abstract: The absolute frequency of the length standard at 514.67 nm based on the molecular iodine (127I2) transition of the P(13) 43-0 component a3 is measured using a self-referenced femtosecond optical comb. This frequency-based technique improves measurement precision more than 100 times compared with previous wavelength-based results. Power- and pressure-related frequency shifts have been carefully studied. The measured absolute frequency is 71.8 ± 1.5 kHz higher than the internationally accepted value of 582 490 603.37 ± 0.15 MHz, adopted by the Comité International des Poids et Mesures (CIPM) in 1997.
• Jones, R. J., Cheng, W., Chen, L., Holman, K. W., Hall, J. L., & Jun, Y. e. (2002). Absolute frequencies, linewidths, and hyperfine structures of iodine transitions near the dissociation limit (523 to 498 NM). CPEM Digest (Conference on Precision Electromagnetic Measurements), 420-421.
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  Abstract: A widely tunable and high-resolution spectrometer based on a frequency doubled Ti:sapphire laser is used to explore sub-Doppler transitions of iodine molecules in the wavelength range of 523 - 498 nm. The wavelength-dependence of the hyperfine transition linewidth of iodine is mapped out in this region. Towards the dissociation limit near 500 nm, the hyperfine-resolved patterns are found to be largely modified. A femtosecond optical comb is used to determine the absolute frequency of the 514.7 nm optical standard with more than a 100-fold improvement in precision.
• Jun, Y. e., Cundiff, S. T., Foreman, S., Fortier, T., Hall, J. L., Holman, K. W., Jones, D. J., & Jones, R. J. (2002). From relative to absolute: Optical phase measurement and control in ultrashort pulses. Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, 1, 167-168.
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  Abstract: Precision phase control of femtosecond laser-based optical frequency combs has produced remarkable and unexpected progresses in the areas of precision spectroscopy, optical frequency metrology, and ultrafast optics. A phase stabilized frequency comb spanning an entire optical octave is established, leading to a single step, phase coherent connection between the optical and radio-frequency spectral domains. This paper presents one of the systems based on an optical transition of iodine molecules, providing an rf clock signal with a frequency stability comparable to that of an optical standard, and that is superior to almost all conventional rf sources.
• Jones, R. J., & Diels, J. (2001). Frequency domain control of femtosecond pulse trains with Fabry-Perot reference cavities for optical frequency metrology. Springer Series in Chemical Physics, 66, 87-89.
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  Abstract: We demonstrate control and stabilization of the carrier frequency, phase, and repetition rate of femtosecond light pulses from a Kerr-lens mode-locked Ti:sapphire laser utilizing a Fabry-Perot reference cavity for use in precision optical frequency measurements.
• Jones, R. J., & Diels, J. -. (2001). Stabilization of femtosecond lasers for optical frequency metrology and direct optical to radio frequency synthesis. Physical Review Letters, 86(15), 3288-3291.
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  PMID: 11327952;Abstract: A technique to stabilized the frequency, phase, and repetition rate of an ultrashort pulse laser system was demonstrated. The method used a Fabry-Perot reference cavity. The difference in two separate portions of the laser's spectrum that was reflected by the cavity must be detected in order to lock the repetition rate independently from its average frequency.
• Jones, R. J., Diels, J., Jasapara, J., & Rudolph, W. (2000). Stabilization of the frequency, phase, and repetition rate of an ultra-short pulse train to a Fabry-Perot reference cavity. Optics Communications, 175(4), 409-418.
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  Abstract: The potential for using a Fabry-Perot cavity as a reference for controlling both the carrier frequency and phase of a pulse relative to that of the cavity is shown. This technique stabilizes the repetition frequency of the laser without the need for an electronic radiofrequency oscillator. The stabilization was performed in the frequency domain by locking more than 500,000 longitudinal modes of the KLM laser to that of the reference cavity.
• Jones, R., & Diels, J. (2000). Frequency and phase stabilization of femtosecond light pulses to a Fabry-Perot reference cavity. Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series, 110-.
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  Abstract: The frequency, phase and repetition rate of an ultrashort pulse train to a Fabry-Perot reference cavity were stabilized using a unique combination of actuators. Sufficient bandwidth enabled to stabilize the laser against fluctuations in both the cavity length and dispersion.
• Jones, R., & Diels, J. (2000). Stabilization of the frequency and repetition rate of a femtosecond pulse train to a Fabry-Perot reference cavity. Conference on Lasers and Electro-Optics Europe - Technical Digest, 146-.
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  Abstract: A Fabry-Perot interferometer provides the essential carrier frequency and phase information to stabilize mode-locked pulse trains. The femtosecond laser has emerged as an indispensable tool for bridging large frequency gaps and open up towards all optical clocks. The frequencies of the mode-locked laser has been expressed. The femtosecond pulse train was transmitted through the reference cavity. The scanning changes both the carrier frequency and the repetition rates. The carrier frequency, phase and repetition rate of the incident pulse train are locked to reference cavity.
• Bohn, M. J., Jones, R. J., & Diels, J. (1999). Mutual Kerr-lens mode-locking. Optics Communications, 170(1), 85-92.
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  Abstract: A new method mutual Kerr-lens mode-locking is presented which provides for a means to define the crossing point of counter-propagating waves in a ring or linear laser, without the use of an saturable absorber. Blue radiation emanating from the crystal was identified as surface second harmonic and sum frequency generation. The latter appearing only in condition of bidirectionality, provides a convenient means to verify that pulses are indeed crossing in the nonlinear crystal. This laser has promising applications for rotation sensing, motion sensing, electro-optic sampling and phase spectroscopy.
• Diels, J., Kuehlke, D., Jones, J., Dang, T. T., & Meng, X. (1999). Progress towards a compact, solid state, active laser gyroscope. Proceedings of SPIE - The International Society for Optical Engineering, 3616, 136-142.
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  Abstract: A compact, solid state, active laser gyroscope was developed using two counter-propagating waves in a mode-locked ring laser. The sensitivity of the ring laser as a probe for non-reciprocal effects results from the fact that the difference between cavity perimeters in either direction is being probed. The beat note between the two pulse trains provides the error signal needed for stabilization. In the stabilized laser, any change in rotation of the laser support appears as an error signal in the feedback.
• Jones, R., Bohn, M. J., & Diels, J. (1998). Solid-state laser gyro using ZnS for Kerr-lens mode locking. Conference on Lasers and Electro-Optics Europe - Technical Digest, 434-.
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  Abstract: Bias-free bidirectional operation of a Ti:sapphire laser has been obtained through the use of a ZnS crystal as Kerr-lensing element. Two types of cavity configuration have been investigated. The Ti:sapphire crystal is located symmetrically with respect to the cavity waist. A ZnS crystal is located close to an auxiliary waist in the cavity. The circulating phase has been found to be naturally symmetric for both directions. However, there is a lock-in effect associated with the scattering of each pulse into each other at their meeting point in the ZnS crystal. This lock-in can be eliminated by either motional dithering or electro-optic dithering.
• Zhao, X. M., Jones, R., Strauss, C. E., Funk, D. J., Roberts, J. P., & Taylor, A. J. (1997). Control of femtosecond pulse filament formation in air through variation of the initial chirp of the pulse. Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, 11, 377-378.
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  Abstract: The feasibility of performing self-filamentation of femtosecond pulses in air is investigated experimentally. A Ti:sapphire chirped pulse amplification laser system producing 150-fs, 15-mJ pulses at a 5 Hz repetition rate is used. Results reveal that filamentation in air occurs only for a sufficiently large negatively chirped pulse.
• Jones, R. J., Gupta, S., Jain, R. K., & Walpole, J. N. (1995). Near-diffraction-limited high power (approx. 1W) single longitudinal mode CW diode laser tunable from 960 to 980nm. Electronics Letters, 31(19), 1668-1669.
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  Abstract: The authors report near-diffraction-limited high power (approx. 1W), single longitudinal mode emission from a 960 - 980nm tunable CW diode laser, consisting of an unstable resonator tapered amplifier structure in a grating-tuned external cavity. > 3W output powers were obtained near the gain peak (approx.970nm) from the grating-tuned diode laser in a quasi-CW mode (500μs, 100Hz) of operation.

Proceedings Publications

• Jones, R. J., Carlson, D., & Wu, T. (2015, Summer). A dual-comb source in the VUV for precision spectroscopy and time-resolved measurements of optical nonlinearities. In Ultrafast Optics 2015, 1.
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  Peer reviewed international conference submission.
• Jones, R. J., Carlson, D., & Wu, T. (2015, summer). Dual-comb femtosecond enhancement cavity for precise study of ionization dynamics and intracavity high harmonic generation. In European Conference on Lasers and Electro-Optics.
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  Peer-reviewed international conference.
• Carlson, D. R., Wu, T., & Jones, R. J. (2014, October). Dual-comb intracavity HHG. In Frontiers in Optics, FIO 2014.
• Carlson, D. R., & Jones, R. J. (2012, January). Pump-Probe intracavity phase spectroscopy. In Frontiers in Optics, FIO 2012.
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  Abstract: Pump-probe intracavity phase spectroscopy utilizes a femtosecond enhancement cavity to enable precision measurements of high-field ultrafast nonlinearites. We demonstrate this new approach measuring the pump-induced plasma evolution of a xenon target with a time-delayed probe. © 2012 Optical Society of America.

Presentations

• Jones, R. J. (2019, Fall). Dual-Comb spectroscopy and characterization of laser produced plasma. Sci X Conference. Palm Springs, CA.
• Jones, R. J. (2018, Fall). Invited Talk: Time-resolved dual-comb spectroscopy of laser induced plasmas. OSA Light, Energy and the Environment. Singapore: OSA.
• Jones, R. J. (2018, October). Invited Talk: Time-resolved dual-comb spectroscopy of laser induced plasmas. Sci X. Atlanta GA: American Chemical Society, many more....
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  Invited Talk
• Jones, R. J., & Lecaplain, C. (2018, Fall). Dual comb laser system for time-resolved spectroscopy of laser induced plasmas from the UV to VUV. OSA Advanced Solid State Lasers. Boston: OSA.
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  Poster presentation.
• Jones, R. J. (2017, May). Dual-Comb Spectroscopy of Laser-Induced Plasmas. Conference on Lasers and Electro-Optics. San Jose, CA: Optical Society of America.
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  J. Bergevin, T. Wu, J. Yeak, B. Brumfield, S. S. Harilal, M. C. Phillips, andR. J. Jones, "Dual-Comb Spectroscopy of Laser-Induced Plasmas," in Conferenceon Lasers and Electro-Optics, OSA Technical Digest (online) (Optical Society ofAmerica, 2017), paper SW1L.2.
• Jones, R. J. (2017, October). Dual-Comb Spectroscopy of Laser Induced Plasmas. APS 4 Corners meeting. Fort Collins, CO: American Physical Society.
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  Invited talk at the APS 4 corners meeting
• Jones, R. J. (2015, December). Frequency comb spectroscopy of laser induced plasma's. Remote Determination of Isotopic Ratios, Information Exchange. University of Arizona: National Nuclear Security Administration.
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  I help co-host a meeting of the NNSA (NA-22), Remote Sensing Portfolio, Enabling Capabilities (EC) Program, that supports multiple national labs, university PI's, and companies through SBIR's, to develop enabling technologies for remote detection of radiological materials.
• Jones, R. J. (2015, Fall). Intracavity High Harmonic Generation: Frequency Combs From the IR to the XUV. Photonics North 2015. Ottawa, Canada.
• Jones, R. J. (2015, October). An XUV dual-comb source for precision spectroscopy. Frontiers in Optics 2015OSA.
• Jones, R. J., Carlson, D., & Wu, T. (2015, May). Dual-comb femtosecond enhancement cavity for precision measurements of plasma dynamics and spectroscopy in the XUV. Conference on Lasers and Electro-Optics. San Jose, CA: OSA.
• Jones, R. J. (2014, Fall). The femtosecond frequency comb: precision spectroscopy from the IR to XUV. Colloquium at the College of Optical Sciences.
• Jones, R. J. (2014, June). XUV frequency combs based on intracavity high harmonic generation. APS annual conference: DAMOP (Division of atomic, molecular, and optical physics). Madison, WI: APS.
• Jones, R. J. (2014, October). Intracavity High Harmonic Generation: Frequency Combs From IR to the XUV. Frontiers in Optics. Tucson, AZ: OSA.

Poster Presentations

• Lytle, C., Paul, J., Wu, T., & Jones, R. J. (2014, October). Precision spectroscopy of the optical clock transition in laser cooled neutral Hg.. Frontiers in Optics.

Others

• Jones, R. J. (2022, March). Broadband 1.5 GHz VECSEL-Based Laser System for High Speed Multicontrast Nonlinear Imaging. http://DOI: 10.1109/LPT.2023.3261830