三模共振光学参变振荡腔中热效应与热自锁定的实验研究

Thermal Effects and Thermal Self-Frequency Locking in Three Mode Resonace Optical Parametric Oscillator

通过在压电陶瓷上加不同扫描速度的三角波电压 ,对光学参变振荡腔进行腔长扫描 ,发现内腔非线性晶体的热效应会严重影响共振峰值功率 ,从而可能用以建立光学参变振荡腔频率的热自锁定。

By scanning the cavity length of optical parametric oscillator (OPO) with tri angle wave voltage of different scan rate applied on PZT, the thermal effect of nonlinear crystal in OPO was observed. The experimental results show that the thermal effect seriously affects the peak power of output pulses at the resonance points, therefore it can be used to demonstrate the thermal self frequency locking of the OPO. The physical mechanism of the observed phenomena is reasonably analysed.