State Key Laboratory of Transient Optics and Photonics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China.
Opt Lett. 2012 Jan 15;37(2):241-3. doi: 10.1364/OL.37.000241.
A practical technique based on the phase-conjugate wave (PCW) generation is proposed to improve the temporal contrast of the picosecond pulses. Our theory predicts the temporal contrast of the picosecond pulses can be enhanced to about the cube of the temporal contrast of the input pulse via the PCW generation, in which the conversion efficiency from the incident pulse to the PCW is about 25%. In a proof-of-principle experiment, the temporal contrast of picosecond pulses was enhanced from 1.7×10(3) to 8.6×10(8) with the conversion efficiency of 10%. This technique is promising to effectively eliminate the background of the ultrashort and ultraintense laser pulses in the future.
提出了一种基于相位共轭波（PCW）产生的实用技术，以提高皮秒脉冲的时间对比度。我们的理论预测，通过 PCW 产生，皮秒脉冲的时间对比度可以增强到输入脉冲时间对比度的约立方，其中从入射脉冲到 PCW 的转换效率约为 25%。在原理验证实验中，皮秒脉冲的时间对比度从 1.7×10(3)增强到 8.6×10(8)，转换效率为 10%。这项技术有望在未来有效地消除超短超强激光脉冲的背景。
