双损耗调制调Q锁模激光器腔内泵浦温度调谐亚纳秒磷酸钛氧钾光参量振荡器

Dual-loss-modulated Q-switched mode-locked laser intracavity pumped temperature-tuned subnanosecond KTiOPO4 optical parametric oscillator.

作者信息

Chu Hongwei, Zhao Jia, Yang Kejian, Zhao Shengzhi, Li Dechun, Li Tao, Li Guiqiu, Qiao Wenchao

出版信息

Appl Opt. 2015 Dec 10;54(35):10517-23. doi: 10.1364/AO.54.010517.

DOI:10.1364/AO.54.010517

Abstract

Using an acousto-optic modulator (AOM) and Cr4+:YAG as the dual-loss modulation, an intracavity KTiOPO4 optical parametric oscillator (OPO) pumped by a simultaneously Q-switched and mode-locked (QML) YVO4/Nd:YVO4 laser was realized. The shortest mode-locking pulse duration of the signal wave at 1573 nm was directly measured as 450 ps at an AOM frequency of 2 kHz and a diode pump power of 10.5 W, corresponding to a peak power of 35.5 kW. The temperature tuning of the output signal wavelength was realized in the range from 1571.99 to 1572.61 nm with a blueshift ratio of 0.027 nm/°C. A set of coupled rate equations for the dual-loss-modulated QML laser pumping intracavity OPO was built for the first time to our knowledge. The numerical solutions were fitted with the experimental results.

摘要

采用声光调制器（AOM）和Cr4+:YAG作为双损耗调制，实现了由同时调Q和锁模（QML）的YVO4/Nd:YVO4激光器泵浦的腔内KTiOPO4光学参量振荡器（OPO）。在AOM频率为2 kHz、二极管泵浦功率为10.5 W时，直接测得1573 nm信号波的最短锁模脉冲持续时间为450 ps，对应峰值功率为35.5 kW。输出信号波长的温度调谐范围为1571.99至1572.61 nm，蓝移比为0.027 nm/°C。据我们所知，首次建立了用于双损耗调制QML激光器泵浦腔内OPO的一组耦合速率方程。数值解与实验结果相拟合。