第23卷第12期 2015年12月
文章编号1004-924X(2015)12-3316-06
光学精密工程
Optics and Precision Engineering
Vol.23
No.12 Dee.2015
外腔调谐的全固态Cr：LiSAF激光器
栾昆鹧”，于力，沈炎龙，黄超，陶蒙蒙
（西北核技术研究所激光与物质相互作用国家重点实验室，陕西西安710024）
摘要：由于调谱元件置于主腔外时，插入损耗影响小，可以扩展调谐范围，本文采用外腔梭镜和光栅调谐结构研制了全固态Cr1LiSAF激光器。分析了外腔调谐结构的基本原理，分别选用校镜和光概作为调谱元件，研制了梭镜外腔调谱
性以及镜片镀膜对输出特性的影响。进行了调谐实验，结果显示：选用棱镜作为外腔调谱元件时，在325mW的吸收泵浦功率下实现了785~985nm的调谱，输出功率最高达21mW。选用光概作为调谱元件时，亦可实现785~985nm的调谱，最大输出功率为20mW，光谱的半峰全宽(FWHM)为0.12nm。得到的结果表明外腔全固态Cr：LiSAF激光器可以实现窄线宽、宽谱调谐输出。
关键调：固体激光器，调增激光器Cr:LiSAF；外腔调谱
中图分类号：TN248.1
文献标识码：A
doi:10.3788/OPE, 20152312.3316
Widely tunable all-solid-state Cr : LiSAF lasers with external cavities
LUANKun-peng',YU Li, SHENYan-long,HUANG Chao,TAO Meng-meng
(State Key Laboratory of Laser Interaction with Matter
NorthwestInstitute of NuclearTechnology,Xi'an710024,China)
*Correspondingauthor,E-mail;luankunpeng@nint.ac.cn
Abstract: When tuning components are placed out of the main cavity structure in & tunable all-solid-state laser, it will has a smaller insertion loss and is conducive to extend the tuning range, This paper develops a all-solid-state Cr : LiSAF laser to realize its wide tunability. The principle of a external-cavity configuration was explored. A prism and a grating were chosen tunable elements, the Cr : LiSAF lasers with prism-controlled external cavity and the Cr : LiSAF laser with grating-controlled external cavity were presented. The tuning characteristics such as tuning ranges, spectra and output powers of the two kinds of lasers were studied and the effect of coating on their output characteristics was analyzed. Finally, the tuning characteristics of prism-controlled laser and grating-controlled laser were compared. The results under an absorption power of 325 mW show that the tuning range of the Cr : LiSAF laser with prism-controlled external cavity is 785-985 nm and its maximum output power is 21 mW. Moreover, the tuning range of the Cr : LiSAF laser with grating-controlled external cavity is also 785—985 nm, its maximum output power is 20 mW and the Full Width at Half Maximum(FWHM) is 0. 12 nm . These results demonstrate that the tunable all-solid-state Cr : LiSAF lasers
收稿日期：2015-06-19；修订日期：2015-08-10.
基金项目：激光与物质相互作用国家重点实验室基金资助项目(No.SKLLIM1511-02)