双级受激布里渊散射相位共轭镜压缩YAG振荡器调Q脉宽

Two-Cell Stimulated-Brillouin-Scattering Phase-Conjugated Mirror Compressing Pulses Width of Q-Switched YAG Oscillator

采用双级布里渊散射相位共轭镜，能提高相位共轭保真度稳定性，将散射光反馈进入YAG振荡器腔内，由偏振棱镜耦合输出的散射激光，具有短脉冲、可调谐、优质光的特点。报道了脉冲压缩机理及影响压缩脉冲宽度的因素，获得了2．5ns、9mJ的散射激光输出。

High and stable values of phase conjugation (PC) fidelity are available by use of a two-cell stimulated-Brillouin-scattering (SBS) PC mirror. Making SBS return to YAG Q- Switched oscillator and output coupled with polarizer, the SBS output pulses take an advantages of short, tunable and stable good quality. The principle of compressing pulses and the influence of PC mirror's relative positions on SBS pulse width are analysed. A SBS pulse with 2. 5 ns width and 9 mJ energy is obtained.