Zotov K V, Tereschenko N V, Ostapiv A Yu, Ivanov G Yu, Surovtseva V P, Konyashkin A V, Ryabushkin O A
Opt Lett. 2024 Feb 15;49(4):1013-1016. doi: 10.1364/OL.515547.
We introduce an approach for the temperature stabilization of nonlinear-optic crystals during laser frequency conversion processes. This approach is based on the stabilization of the piezoelectric resonance (PR) frequency of the crystal, so that the crystal itself becomes a temperature sensor. Application of an electronic oscillator provides a remarkably handy way to determine the PR frequency. When the PR frequency stabilization was employed, the stable generation of the second harmonic (SH) at 532 nm wavelength was achieved in periodically poled lithium niobate (PPLN) at more than 30% power compared to the case of the application of external temperature sensors. Long-term stability of SH power was also enhanced.
我们介绍了一种在激光频率转换过程中实现非线性光学晶体温度稳定的方法。该方法基于晶体压电共振（PR）频率的稳定，从而使晶体本身成为一个温度传感器。使用电子振荡器提供了一种非常简便的方法来确定PR频率。当采用PR频率稳定时，与使用外部温度传感器的情况相比，在周期极化铌酸锂（PPLN）中以超过30%的功率实现了532nm波长二次谐波（SH）的稳定产生。SH功率的长期稳定性也得到了提高。
