输出镜透过率对半导体可饱和吸收镜锁模激光器的影响  

Influence of Output Mirror Transmittance on Semiconductor Saturable Absorber Mirror Mode-Locked Laser

作　　者：陈博伦 方晓惠[1] Chen Bolun;Fang Xiaohui(School of Physics&Electronic Engineering,Guangzhou University,Guangzhou,Guangdong 510006,China)

机构地区：[1]广州大学物理与电子工程学院

出　　处：《激光与光电子学进展》2019年第19期137-141,共5页Laser & Optoelectronics Progress

摘　　要：对基于808nm端面抽运的半导体可饱和吸收镜(SESAM)锁模Nd…YVO4激光器的输出特性进行研究,通过选择不同透过率的输出镜,设计一套针对不同输出功率需求的锁模激光器方案。首先系统地研究输出镜透过率对激光锁模功率和阈值的影响,当输出镜透过率为10%,抽运功率为8W时,得到最高输出功率为2.58W的连续锁模脉冲输出,转换效率为32.3%。当输出镜透过率为0.1%,抽运功率为1W时,得到低阈值连续锁模脉冲输出,输出功率为0.58mW。然后自主搭建自相关光路测量锁模脉冲,结合自相关曲线分析锁模激光器的寄生振荡情况,通过优化输出镜抑制寄生振荡,获得纯净的锁模脉冲,其脉冲宽度为13ps,重复频率为150MHz。This study focuses on the output characteristics of an 808-nm laser diode(LD)end-pumped Nd…YVO4 mode-locked laser with a semiconductor saturable absorber mirror(SESAM).Further,a mode-locked laser with variable output power is designed by the selection of the output mirror transmittance.First,the influence of the output mirror transmittance on the laser mode-locked power and threshold is systematically studied.An output mirror transmittance of 10%and a pumping power of 8 Wresult in the highest output power of 2.58 Wthat corresponds to a conversion efficiency of 32.3%,whereas an output mirror transmittance of 0.1%results in a low continuous-wave mode-locked threshold of 1Wand an output power of 0.58mW.Second,the mode-locked pulse width is measured by using a home-made autocorrelator;the parasitic oscillations of the laser are analyzed based on the autocorrelation traces.Thus,we obtain mode-locked pulses with a pulse width of 13ps at a repetition rate of 150MHz by optimizing the output mirror to suppress the parasitic oscillations.

关 键 词：激光器 半导体可饱和吸收镜锁模 寄生振荡 输出镜透过率 低阈值 自相关 

分 类 号：O436[机械工程—光学工程]