Yin Yanchun, Li Jie, Ren Xiaoming, Zhao Kun, Wu Yi, Cunningham Eric, Chang Zenghu
Opt Lett. 2016 Mar 15;41(6):1142-5. doi: 10.1364/OL.41.001142.
We produce a 3 mJ, two-cycle (11.4 fs), 1 kHz, carrier-envelope phase (CEP)-stable laser source at 1.7 μm via a three-stage Ti:sapphire-pumped optical parametric chirped-pulse amplifier in BiB3O6. We achieve a pump-to-signal conversion efficiency of 18% in the last stage, which is, to the best of our knowledge, the highest yet achieved for near-octave bandwidth amplification. A f-to-2f measurement shows a CEP instability of 165 mrad over 1 h. This is an ideal light source for generating isolated attosecond pulses in the soft x-ray region.
我们通过在硼酸铋（BiB3O6）中采用三级钛宝石泵浦的光学参量啁啾脉冲放大器，产生了一个波长为1.7μm、能量为3 mJ、脉宽为两个周期（11.4 fs）、重复频率为1 kHz且载波包络相位（CEP）稳定的激光源。我们在最后一级实现了18%的泵浦到信号转换效率，据我们所知，这是近倍频程带宽放大中迄今所达到的最高效率。f到2f测量表明，在1小时内CEP不稳定性为165 mrad。这是在软X射线区域产生孤立阿秒脉冲的理想光源。
