单频可调谐连续1342 nm注入锁频环形激光器  

A Tunable CW Single-Frequency 1342-nm Injection-Locked Ring Laser

作　　者：孙桂侠[1,2] 凌菲彤 熊明 刘涛 安振杰[1] 张志忠 Sun Guixia;Ling Feitong;Xiong Ming;Liu Tao;An Zhenjie;Zhang Zhizhong(Institute of Physical and Chemical Engineering,Tianjin 300180,China;Key Laboratory of Particle Transport and Enrichment Technology for National Defense,Tianjin 300180,China)

机构地区：[1]核工业理化工程研究院,天津300180 [2]粒子输运与富集技术国防科技重点实验室,天津300180

出　　处：《中国激光》2021年第7期19-25,共7页Chinese Journal of Lasers

摘　　要：为了获得高功率的单频可调谐1342 nm激光,研究了一种注入锁频Nd∶YVO_(4)环形激光器。以1.0 W可调谐单频连续1342 nm激光为种子光,“8”字环形谐振腔为从激光器功率腔,基于PDH(Pound-Drever-Hall)锁频技术实现了环形功率腔的锁定,获得了8.3 W的单频连续可调谐1342 nm的激光输出。Objective At present,distributed Bragg reflector(DBR),distributed feedback(DFB)laser,or external cavity diode laser(ECDL)is usually used to realize a tunable single-frequency laser output in 1.3μm.However,the output power of these diode lasers is as low as several mW.Some studies used a 1.3-μm laser for an effective selective atom stimulation;hence,a higher output power of the lasers was needed.This work presents an injection-locked Nd∶YVO_(4) ring laser that can effectively improve the power of a CW single-frequency 1342-nm laser with wavelength tuning.The amplified 1342-nm laser retains most of the spectral characteristics of the seed laser.This injection-locked Nd∶YVO_(4) ring laser has the advantages of high gain and high beam quality and is very easy to realize.As a consequence of the high power,the doubling frequency of 1342 nm(671-nm red light)and the quadruple frequency(336-nm UV light)can be obtained more easily for some other works.Methods An injection-locked Nd∶YVO_(4) ring laser was studied herein.Three modules were considered,namely the seed laser,the laser amplifier,and the Pound-Drever-Hall(PDH)frequency locking system.The seed laser provides the injection source.While the PDH system is being unlocked,the seed laser is reflected away from the cavity because it does not match the resonant conditions of the power cavity.Conversely,while the PDH system is locked,the seed light can be injected into the amplifier cavity and effectively amplified.In this work,a seed laser with output power of the order of mW,good beam quality,and good stability was used.After the injection-locked amplification,the laser retained the spectral characteristics of the seed light,including the single longitudinal mode and the adjustable wavelength.Meanwhile,the laser energy and the beam quality were improved.In this study,a tunable 1.0 W CW single-frequency 1342-mm laser was used as the seed light,and an 8-type ring resonator was used as the amplifier cavity.The injection-locked Nd∶YVO_(4) ring laser was realized,ba

关 键 词：激光器 可调谐单频激光器 注入锁频技术 PDH锁频 

分 类 号：TN248.1[电子电信—物理电子学]