ReSe_(2)连续波锁模Nd:YVO_(4)腔内倍频绿光激光器  

ReSe_(2) continuous-wave mode-locked Nd:YVO_(4) intracavity frequency-doubled green laser

作　　者：薛喻宸 白冰 张斌[1] 李立[1] XUE Yuchen;BAI Bing;ZHANG Bin;LI Li(College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]哈尔滨工程大学物理与光电工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2021年第8期1237-1242,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(61875043);中央高校基本科研业务费项目(3072021CF2522).

摘　　要：为了发展新型二维材料在倍频锁模激光器中的应用,本文采用ReSe_(2)二维材料作为可饱和吸收体锁模元件,研究二极管端面泵浦Nd:YVO_(4)腔内倍频绿光固体激光器,获得兆赫兹高重频、纳秒窄脉宽的绿光脉冲激光输出。采用紧凑V型腔设计和腔内倍频方案,实现1064 nm基频光的被动锁模振荡,结合非线性晶体LiB3O5和KTiOPO_(4)完成二次谐波频率变换,产生532 nm倍频激光脉冲。在LiB3O5晶体倍频作用下,连续波锁模脉冲绿光输出的重复频率为87.51 MHz,脉冲宽度为3.5 ns,平均功率可达到240 mW。在相同条件下,利用KTiOPO_(4)晶体倍频作用,最大输出功率可超过470 mW。研究结果为发展高采样率水下激光探测技术提供了可用的绿光脉冲源。To develop the application of new two-dimensional materials in frequency-doubled mode-locked lasers,ReSe_(2),an emerging kind of two-dimensional materials,is used as the saturable absorber mode-locking element in this study to examine the diode end-pumped Nd:YVO_(4)intracavity frequency-doubled green laser,thus obtaining the ReSe_(2)mode-locking green pulse laser with megahertz-level high repetition frequency and nanosecond-level narrow pulse width.The design of the compact V-shaped cavity and the intracavity frequency-doubled scheme are incorporated.The passive mode-locked oscillation of the fundamental frequency operates at 1064 nm.By exploiting the nonlinear crystals of LiB 3O 5 and KTiOPO_(4)for the second harmonic frequency conversion,the 532 nm frequency-doubled laser pulse is generated.With the LiB 3O 5 crystal for frequency doubling,the output repetition frequency of the continuous-wave mode-locked green pulse output is 87.51 MHz,the pulse width is 3.5 ns,and the average power is 240 mW.Under the same experimental conditions and with the KTiOPO_(4)crystal for frequency doubling,the maximum output power can be improved over 470 mW.The research results provide an available green pulse laser source for the development of underwater laser detection technology at high sampling rates.

关 键 词：二维材料ReSe_(2) Nd:YVO_(4)晶体 被动锁模 腔内倍频 LBO晶体 KTP晶体 二次谐波 V型谐振腔 激光器 

分 类 号：TN248[电子电信—物理电子学]