期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 108, 期 3, 页码 501-508出版社
SPRINGER
DOI: 10.1007/s00340-012-5107-5
关键词
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资金
- Ministry of Education, Youth and Sports of the Czech Republic [LN00A100, LC528]
- European Committee [RII3-CT-2003-506350, 6. FW]
- Grant Agency of the Czech Republic [202/06/0814]
A two-stage optical parametric amplifier driven by a frequency-tripled beam from the high-energy iodine laser system SOFIA was built. This single-shot Optical Parametric Chirped Pulse-Amplification facility (OPCPA) and the system synchronizing the pump and signal pulses are described in detail. The chirped seed pulse of a Ti:sapphire oscillator running at the central wavelength of 800 nm is amplified in the two-stage (LBO and KDP) optical parametric amplifier over 10(8) times. The amplified spectral bandwidth of 68 nm corresponds to the pulse duration of 14 fs when a transform-limited pulse is assumed. This implies a compressed pulse of TW power. Systematic gain measurements reveal a good match with the theoretical predictions. Signal and idler beam fluence profiles are presented. The suitability of the iodine photo-dissociation laser as a pump source for the OPCPA technique is thus proved for the first time experimentally. A distinctive feature of the iodine laser is its very narrow gain bandwidth (< 0.1 cm(-1)) and, therefore, the conventional chirped-pulse amplification technique does not lead to pulse durations at the femtosecond level.
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