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Kilohertz Gain-Switched Ti:sapphire Laser Operation and Femtosecond Chirped-Pulse Regenerative Amplification

KHz 반복률에서의 Ti:sapphire 이득 스위칭 레이저 발진과 펨토초 처프펄스 재생 증폭

  • Lee, Yong-In (Division of Energy Systems Research, Ajou University) ;
  • Ahn, Yeong-Hwan (Division of Energy Systems Research, Ajou University) ;
  • Lee, Sang-Min (Division of Energy Systems Research, Ajou University) ;
  • Seo, Min-Ah (Department of Physics, Seoul National University) ;
  • Kim, Dai-Sik (Department of Physics, Seoul National University) ;
  • Rotermund, Fabian (Division of Energy Systems Research, Ajou University)
  • 이용인 (아주대학교 에너지시스템학부) ;
  • 안영환 (아주대학교 에너지시스템학부) ;
  • 이상민 (아주대학교 에너지시스템학부) ;
  • 서민아 (서울대학교 물리학부) ;
  • 김대식 (서울대학교 물리학부) ;
  • Published : 2006.12.25

Abstract

We present a comprehensive study of a chirped pulse Ti:sapphire regenerative amplifier system operating at 1 kHz. Main constituents of the system are described in detail. The amplifier stage was first converted to a repetition rate-tunable kHz gain-switched nanosecond Ti:sapphire laser. Operation characteristics at different repetition rates such as build-up times of laser pulses, pump power-dependent output powers and pulse durations, damage thresholds, and tunability ranges were studied. Based on the results achieved, the switching time of the Pocket's cell used and the round trip numbers in the regenerative amplifier were optimized at 1 kHz. The output pulses with a pulse width of 50fs from a home-made Ken lens mode-locked Ti:sapphire oscillator were used as seed pulses. The pulses were expanded to 120ps in a grating stretcher prior to coupling into the 3-mirror amplifier cavity. After amplification and recompression, a stable 1kHz Ti:sapphire regenerative amplifier system, which delivers 85-fs, $320-{\mu}J$ pulses, was fully constructed.

References

  1. M. Lorenc, M. Ziolek, R. Naskrecki, J. Karolczak, J. Kubicki, and A. Maciejewski, 'Artifacts in femtosecond transient absorption spectroscopy,' Appl. Phys. B, vol. 74, pp. 19-27, 2002 https://doi.org/10.1007/s003400100750
  2. B. H. Cumpston, S. P. Ananthavel, S. Barlow, D. L. Dyer, J. E. Ehrlich, L. L. Erskine, A. A. Heikal, S. M. Kuebler, I. S. Lee, D. McCord-Maughon, J. Qin, H. Röckel, M. Rumi, X. Wu, S. R. Marder, and J. W. Perry, 'Two-photon polymerization initiators for three-dimensional optical data storage and microfabrication,' Nature, vol. 398, no. 4, pp. 51-54, 1999 https://doi.org/10.1038/17989
  3. J. Neev, L. B. D. Silva, M. D. Feit, M. D. Perry, A. M. Rubenchik, and B. C. Stuart, 'Ultrashort Pulse Lasers for Hard Tissue Ablation,' IEEE J. Selected Topics in Quantum Electronics, vol.2, no. 4, pp. 790-800, 1996 https://doi.org/10.1109/2944.577301
  4. A. Nahata, A. S. Weling, and T. F. Heinz, 'A wideband coherent terahertz spectroscopy system using optical rectification and electro-optic sampling,' Appl. Phys. Lett., vol. 69, no. 16, pp. 2321-2323, 1996 https://doi.org/10.1063/1.117511
  5. I. P. Christov, M. M. Murnane, and H. C. Kapteyn, 'High-Harmonic Generation of Attosecond Pulses in 'the Single-Cycle' Regime,' Phys. Rev. Lett., vol.78, no. 7, pp. 1251-1254, 1997 https://doi.org/10.1103/PhysRevLett.78.1251
  6. B. R. Masters, P. T. C. So, and E. Gratton, 'Optical Biopsy of In Vivo Human Skin: Multi-photon Excitation Microscopy,' Lasers Med. Sci., vol. 13, pp. 196-203, 1998 https://doi.org/10.1007/s101030050074
  7. R. Kodama, P. A. Norreys, K. Mima, A. E. Dangor, R. G. Evans, H. Fujita, Y. Kitagawa, K. Krushelnick, T. Miyakoshi, N. Miyanaga, T. Norimatsu, S. J. Rose, T. Shozaki, K. Shigemori, A. Sunahara, M. Tampo, K. A. Tanaka, Y. Toyama, T. Yamanaka, and M. Zepf, 'Fast heating of ultrahigh-density plasma as a step towards laser fusion ignition,' Nature, vol. 412, no. 23, pp. 798-802, 2001 https://doi.org/10.1038/35090525
  8. P. F. Moulton, 'Ti-doped sapphire: Tunable solid-state lasers,' Opt. News, vol. 8, no. 6, pp. 9-21, 1982 https://doi.org/10.1364/ON.8.6.000009
  9. R. L. Fork, B. I. Greene, and C. V. Shank, 'First CPM,' Appl. Phys. Lett., vol. 38, no. 9, pp. 671-672, 1981 https://doi.org/10.1063/1.92500
  10. D. Strickland and G. Mourou, 'Compression of amplified chirped optical pulses,' Opt. Commun., vol. 56, pp. 219-221, 1985 https://doi.org/10.1016/0030-4018(85)90120-8
  11. W. H. Lowdermilk and J. E. Murray, 'The multipass amplifier: Theory and numerical analysis,' J. Appl. Phys., vol. 51, no. 5, pp. 2436-2444, 1980 https://doi.org/10.1063/1.328014
  12. 차용호, 강영일, 홍경한, 남창희, '30 fs,2 TW Ti:sapp-hire 레이저 시스템의 구성 및 동작특성,' 새물리, 제 37 권, pp. 469-473, 1997
  13. J. V. Rudd, G. Korn, S. Kane, J. Squier, G. Mourou, and P. Bado, 'Chirped-pulse amplification of 55-fs pulses at a 1-kHz repetition rate in a Ti:Al2O3 regenerative amplifier,' Opt. Lett., vol. 18, no. 23, pp. 2044-2046, 1993 https://doi.org/10.1364/OL.18.002044
  14. 김남희, 김병태, '재생증폭기의 증폭특성에 관한 수치해석,' 한국광학회지, 제 5권 1호, pp. 67-73, 1994
  15. 김달우, M. Saeed, L. F. DiMauro, 'Nd:YLF 레이저 펄스의 재생식 증폭,' 한국광학회지, 제 3권 1호, pp. 37-42, 1992
  16. S. Kane and J. Squier, 'Fourth-order-dispersion limitations of aberration-free chirped-pulse amplification systems,' J. Opt. Soc. Am. B, vol. 14, no. 5, pp. 1237-1244, 1997 https://doi.org/10.1364/JOSAB.14.001237
  17. M.R.H. Knowles and C.E. Webb, 'Cavity configurations for copper vapour laser pumped titanium sapphire lasers,' Opt. Commun., vol. 89, pp. 493-506, 1992 https://doi.org/10.1016/0030-4018(92)90563-7
  18. 김병태, 이형권, '복굴절 필터를 사용한 펄스동작 Ti:sapphire 레이저의 파장 가변특성,' 한국광학회지, 제 8권 6호, pp. 450-455, 1997
  19. S. Takeuchi and T. Kobayashi, 'Highly efficient Ti:sapphire regenerative amplifier,' Opt. Commun., vol. 109, pp. 518-526, 1994 https://doi.org/10.1016/0030-4018(94)90508-8
  20. J. M. Eggleston, L. G. DeShazer, and K. W. Kangas, 'Characteristics and Kinetics of Laser-Pumped Ti:Sapphire Oscillators,' IEEE. J. Quantum Elec., vol. 24, pp. 1009-1015, 1988 https://doi.org/10.1109/3.222
  21. W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, USA, 1976), pp. 74-88
  22. P. F. Moulton, 'Spectroscopic and laser characteristics of $Al_2O_3$,' J. Opt. Soc. Am. B, vol. 3, pp. 125-132, 1986 https://doi.org/10.1364/JOSAB.3.000125