Opt Lett. 2018 Nov 15;43(22):5681-5684. doi: 10.1364/OL.43.005681.
We report on the laser pulse output of 339 J centered at 800 nm from a chirped-pulse amplification (CPA) Ti:sapphire laser system at the Shanghai Superintense Ultrafast Laser Facility. The experimental results demonstrated that the parasitic lasing as well as the transverse amplified spontaneous emission of the homemade 235-mm-diameter Ti:sapphire final amplifier were suppressed successfully via the temporal dual-pulse pumped scheme and the index-matching liquid cladding technique. The maximum pump-to-signal conversion efficiency of 32.1% was measured for the final amplifier. With a compressor transmission efficiency of 64% and a compressed pulse duration of 21 fs obtained for the sample light at a lower energy level, this laser system could potentially generate a compressed laser pulse with a peak power of 10.3 PW. The experimental results represent significant progress with respect to the CPA laser.
我们报告了上海超强超短激光实验装置中啁啾脉冲放大（CPA）钛宝石激光系统在 800nm 处中心输出的 339J 激光脉冲。实验结果表明，通过时间双脉冲泵浦方案和折射率匹配液包层技术，成功抑制了自制 235mm 直径钛宝石末级放大器的寄生激光和横向放大自发辐射。末级放大器的最大泵浦到信号转换效率为 32.1%。对于低能量水平的样品光，压缩器的传输效率为 64%，压缩脉冲持续时间为 21fs，该激光系统有可能产生峰值功率为 10.3PW 的压缩激光脉冲。实验结果代表了在 CPA 激光方面的重大进展。
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