基于注入锁定技术的单频连续高功率1342 nm Nd:YVO_(4)激光器  

A high-power single-frequency continuous-wave 1342 nm Nd:YVO_(4) laser with injection-locking

作　　者：周子涵 王志敏[1,2] 薄勇[1,2] 张丰丰 赵文成 付莉 何汉星 崔大复[1,2] 彭钦军[1,2] Zhou Zihan;Wang Zhimin;Bo Yong;Zhang Fengfeng;Zhao Wencheng;Fu Li;He Hanxing;Cui Dafu;Peng Qinjun(Key Laboratory of Solid-state Laser,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Functional Crystal and Laser Technology,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院理化技术研究所固体激光重点实验室,北京100190 [2]中国科学院理化技术研究所功能晶体和激光技术重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《红外与激光工程》2024年第1期114-120,共7页Infrared and Laser Engineering

摘　　要：研究了一种基于注入锁定技术的888 nm半导体激光器(LD)泵浦的高功率单频可调谐1 342 nm Nd:YVO_(4)激光器。采用最大输出功率20 mW分布式反馈单频半导体1 342 nm激光器作为注入种子,利用lock-in (LI)技术,对LD端泵的Nd:YVO_(4)环形腔激光器进行种子注入,实现了单频可调谐激光输出。激光器最大平均输出功率为13.9 W,测量的线宽为41 MHz,调谐范围为1 341.677 4~1 341.802 5 nm。x轴和y轴的光束质量M2因子分别为M_(x)^(2)=1.30和M_(y)^(2)=1.23。实验结果表明:与先前文献报道的注入锁定1 342 nm可调谐激光的结果相比,所需种子功率大幅减小,输出功率也有所提升。Objective The single-frequency lasers operating at 1.3μm have been extensively investigated in a variety of fields,including quantum optics and fiber optical communication.A noteworthy example is the single-frequency tunable continuous-wave 671 nm laser based on frequency doubling of 1342 nm laser,which is near the D-line atomic transitions(670.97 nm)of lithium vapor.Consequently,it finds important applications in the field of atomic physics related to lithium atoms,such as optical cooling,lithium atom interferometer,and lithium isotope separation.In applications like the lithium atom interferometer,a higher output power of the laser can yeild improved results.At present,the output power of single-frequency continuous-wave 1342 nm diode lasers is as low as several miliwatts,necessitating application by Raman laser amplifiers and solid-state laser amplifiers.Therefore,the entire system becomes large and heavy.This paper introduces an injection-locked single-frequency tunable 1342 nm Nd:YVO_(4) laser with high output power.The injection-locked laser offers the advantages of a small size and high gain,making it suitable for special demands.Methods In this paper,an injection-locked 1342 nm continuous-wave single-frequency tunable Nd:YVO_(4) laser is developed.The system employs an end-pumped Nd:YVO_(4) ring laser as the slave laser,with a distributed feedback laser(DFB)as the seed laser.The seed laser is coupled into the Nd:YVO_(4) ring laser through output mirror(Fig.1).To achieve cavity length locking,a lock-in(LI)module is employed.The LI module detects laser intensity through a photoelectric detector and provides feedback control by adjusting the voltage on the piezoelectric transducer(PZT).The Nd:YVO_(4) ring laser operates bidirectionally under free operation.When the PZT on the cavity mirror is adjusted to match the cavity length with the wavelength of the injected seed laser,the laser can operate unidirectionally,resulting in a single-frequency continuous-wave 1342 nm laser.The laser's tuning capability is a

关 键 词：Nd:YVO_(4)激光器 连续波 单频 可调谐 注入锁定 

分 类 号：O434.3[机械工程—光学工程]