16 May 1994 Chirped-pulse amplification with flashlamp-pumped Ti:sapphire amplifiers
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Abstract
Ti:Sapphire (Ti:Al2O3) amplifier stages are typically pumped with Q-switched Nd:YAG lasers doubled to 532 nm because of good spectral overlap, short temporal width, high repetition rate (i.e., 10 Hz to > 5 kHz), and the problems associated with flashlamp pumping a material with a relatively short upper state lifetime. Limitations to this pumping method arise due to the 1 to 1.5 joule/pulse ceiling found in most commercial high rep rate Nd:YAG lasers. The availability of high quality, large aperture Ti:Sapphire rods has made the flashlamp-pumping scheme an attractive option. The front end of our laser relies on chirped pulse amplification (CPA) in laser pumped Ti:Sapphire to generate 55 mJ, 90 fsec pulses at a 10 Hz rate. We report the use of a flashlamp pumped Ti:Sapphire head to further amplify the output of our system, producing 90 fsec, 250 mJ pulses at 5 Hz. The excellent output spatial profile yields a near diffraction-limited 5 micrometers spot size and peak irradiance in excess of 5 X 1018 W/cm2.
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James D. Bonlie, James D. Bonlie, William E. White, William E. White, Dwight F. Price, Dwight F. Price, David H. Reitze, David H. Reitze, } "Chirped-pulse amplification with flashlamp-pumped Ti:sapphire amplifiers", Proc. SPIE 2116, Generation, Amplification, and Measurement of Ultrashort Laser Pulses, (16 May 1994); doi: 10.1117/12.175867; https://doi.org/10.1117/12.175867
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