Wang Hongli, Seongwoo Cha, Kong Hong Jin, Wang Yulei, Lu Zhiwei
Opt Express. 2022 Oct 10;30(21):38995-39013. doi: 10.1364/OE.469481.
Thermal problems of high-repetition-rate stimulated Brillouin scattering (SBS) pulse compression in liquid media are theoretically and experimentally analyzed in detail. A wedge lens with less coma-aberration was designed using the ray tracing method and the thermally induced beam-pattern distortion was compensated by inhibiting thermal convection. The heat transfer form and fluid state were quantitatively analyzed for different SBS liquid media. For a 74-W pump power, 3-kHz pulse-compressed phase-conjugation mirror with an energy efficiency of 36.2% is achieved. A potential optimization method of continuously adjusting SBS output characteristics using a mixed medium is proposed and theoretically demonstrated, to improve energy efficiency.
详细地从理论和实验两方面分析了液体介质中高重复率受激布里渊散射（SBS）脉冲压缩的热问题。使用光线追迹法设计了彗差较小的楔形透镜，并通过抑制热对流来补偿热致光束图案畸变。对不同的SBS液体介质的传热形式和流体状态进行了定量分析。在74瓦泵浦功率下，实现了能量效率为36.2%的3千赫兹脉冲压缩相位共轭镜。提出并从理论上证明了一种使用混合介质连续调节SBS输出特性以提高能量效率的潜在优化方法。
