反射式体布拉格光栅设计及其在激光器中的应用研究  

Design of reflective volume Bragg grating and its application in lasers

作　　者：何进 赵士龙[1] 郭凌伟 华有杰[1] 叶仁广 徐时清[1] HE Jin;ZHAO Shilong;GUO Lingwei;HUA Youjie;YE Renguang;XU Shiqing(Institute of Optoelectronic Materials and Devices,China Jiliang University,Hangzhou,Zhejiang 310018,China;Hangzhou Bright Materio Optoelectron Technology Co.,Ltd,Hangzhou,Zhejiang 310018,China)

机构地区：[1]中国计量大学光电材料与器件研究院,浙江杭州310018 [2]杭州亮材光电科技有限公司,浙江杭州310018

出　　处：《光电子．激光》2024年第2期122-127,共6页Journal of Optoelectronics·Laser

基　　金：浙江省自然科学基金重点项目(LZ21F050001)资助项目。

摘　　要：半导体激光器的发射波长随工作电流和温度的改变而变化,从而影响输出激光的有效线宽和波长稳定性,无法满足固体激光器中增益介质对泵浦源波长和线宽的要求。使用自主研发的衍射效率为9.9%的878 nm反射式全息体布拉格光栅(volume Bragg grating, VBG)作为半导体激光器的反射腔镜,可以将激光发射波长锁定在设计的878 nm附近,输出线宽仅为0.3 nm,波长电流漂移系数为0.015 nm/A,温度漂移系数为0.007 5 nm/℃。利用波长锁定的半导体激光器作为泵浦源、自主研发的衍射效率为98.71%和94.32%的1 064 nm VBG作为前后腔镜以及掺杂浓度为0.3%的Nd∶YVO4晶体作为增益介质搭建全固态激光器,经过空间光路的调试,获得中心波长1 064.2 nm、线宽0.29 nm的连续稳定激光输出。The emission wavelength of semiconductor laser varies with the change of working current and temperature,which affects the effective linewidth and wavelength stability of the output laser,and cannot meet the requirements of the gain medium in the solid-state laser for the pump source wavelength and linewidth.In this paper,a self-developed reflective holographic volume Bragg grating(VBG)of 878 nm with a diffraction efficiency of 9.9%is designed.By using the VBG as a reflective cavity mirror,the laser emission wavelength can be locked around the designed 878 nm and an output linewidth is only 0.3 nm.The wavelength-current drift coefficient is 0.015 nm/A and the temperature drift coefficient is 0.0075 nm/°C.An all-solid-state laser is constructed by using a wavelength locking semiconductor laser as the pump source.The self-developed 1064 nm VBG with a diffraction efficiency of 98.71%and 94.32%is used as the front and rear cavity mirrors,respectively.A Nd∶YVO4 crystal with a doping concentration of 0.3%is used as the gain medium.After the spatial optical path tuning,a continuous and stable laser output with a central wavelength of 1064.2 nm and a line width of 0.29 nm are obtained.

关 键 词：体布拉格光栅(VBG) 波长锁定 窄线宽 全固态激光器 

分 类 号：TN365[电子电信—物理电子学]