种籽光注入非谐振KTP光参量振荡器

Non-resonant KTP Optical Parametric Oscillator with Injection Seeding

采用Nd:YAG激光倍频后剩余的1.064μm基频光抽运非临界相位匹配KTP光参量振荡器(OPO),产生的1.57μm激光作为种籽光注入到Nd:YAG 532 nm倍频激光抽运的非谐振汉晶体走离补偿的KTP OPO谐振腔中,使得OPO阈值降低30％,能量转换效率提高5％。

The 1.57μm signal light produced by non-critically phase-matched KTP optical parametric oscillator (OPO) pumped by the depleted 1.064 μm Nd: YAG laser after frequency-doubled conversion is injection-seeded into another non-resonant KTP OPO pumped at 532 nm with dual-crystal walk-off compensating configuration. The threshold of non-resonant OPO is reduced by 30% , and energy conversion efficiency is increased by a factor of 5 % .