Generation of high-contrast, 30 fs, 1.5 PW laser pulses from chirped-pulse amplification Ti:sapphire laser.
作者： Tae Jun Yu , Seong Ku Lee , Jae Hee Sung , Jin Woo Yoon , Tae Moon Jeong
DOI: 10.1364/OE.20.010807
关键词:
摘要: High-contrast, 30 fs, 1.5 PW laser pulses are generated from a chirped-pulse amplification (CPA) Ti:sapphire system at 0.1 Hz repetition rate. The maximum output energy of 60.2 J is obtained, pump 120 J, booster amplifier that pumped by four frenquency-doubled Nd:glass systems. During amplification, parasitic lasing suppressed index matching fluid with absorption dye and the careful manipulation time delay between seed pulses. An amplified pulse passes through compressor consisting gold-coated gratings. After compression, measured duration 44.5 yielding peak power about PW. 1.5-PW highest values ever achieved femtosecond CPA system. To maintain sufficiently high temporal contrast, saturable absorber installed in front-end two ultrafast Pockels cells order to minimize spontaneous emission (ASE) pre-pulse intensity. adaptive optics implemented for focused intensity 1 × 1022 W/cm2 can be obtained when an f/3 optic used.
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