520nm泵浦780nm+1560nm双共振光学参量振荡器

Doubly-resonant 780 nm+1 560 nm Optical Parametric Oscillator Pumped by 520 nm Laser

我们在实验中演示了520nm单频绿光泵浦的基于周期极化磷酸钛氧钾(PPKTP)晶体的780nm+1560nm双共振光参量振荡器,高效制备780nm+1 560nm连续可调谐双色下转换光场。该参量振荡器可输出93.3 mW的1 560nm单频激光和44.6mW的780nm单频激光。通过改变PPKTP晶体的温度所得到的波长粗调范围为:信号光1 529.81nm^1 573.83nm(~44nm),闲置光788.26nm^777.20nm(~11nm);通过连续调谐520nm泵浦激光频率初步得到的闲置光在780.24nm(铷原子D2线)处频率连续调谐范围约1.6GHz。

We experimentally demonstrated a high-efficiency doubly-resonant optical parametric oscillator （DROPO） of 780 nm＋ 1560 nm continuously tunable two-color down-conversion optical fields pumped by 520 nm single-frequency green laser based on the periodically-poled KTiOPO4 （PPKTP） crystal. This DROPO can provide 93.3 mW at 1560 nm and 44.6 mW at 780 nm single-frequency lasers. Coarse wavelength tuning are 1529.81nm-1573.83 nm （-44nm） for signal and 788.26 nm-777.20 nm （-11nm） for idler via changing the PPKTP crystal＇s temperature; the preliminary continuous frequency tuning range is -1.6 GHz around 780. 24 nm via continuously tuning 520 nm pump laser＇s frequency.