物理学报2017，Vol.66Issue(15)：152-158,7.DOI:10.7498/aps.66.154204
Nd:YSAG单晶的光谱和激光性能
Spectral and laser properties of Nd:YSAG single crystal?
摘要
Abstract
In order to solve the problem of low segregation coefficient of Nd3+ ions in YAG crystal, Sc3+ ions are used to replace some Al3+ ions in YAG, so that the YAG cell becomes bigger, thereby the segregation coefficient of Nd3+ ion increases. In this paper, the spectra and laser characteristics of Nd:YSAG single crystal are studied. The (1.5 at.%) Nd3+:Y3Sc2Al3O12 (YSAG) laser crystal is grown by Czochralski method, and X-ray rocking curve shows that the crystal quality is good. The concentration of ions in Nd:YSAG is measured by an electronic probe. The segregation coefficient of Nd3+ ion is calculated to be 0.35, which is approximately twice as much as that of Nd3+ in YAG. The absorption and emission spectra are measured, which indicates that it can be pumped by an 808 nm-laser diode (LD). The strongest emission from the transition 4F3/2→4I11/2 of Nd:YSAG peaks at 1059 nm with an emission cross section of 1.03 × 10-19 cm2, and the lifetime of 4F3/2 is about 253 μs, which indicates that Nd:YSAG has roughly an efficiency equal to that of Nd:YAG, but the laser upper level lifetime is longer than that of Nd:YAG, which is more favorable for Q-switched laser operation. The 808 nm-LD is used to pump Nd:YSAG rod of 2 mm × 2 mm × 6 mm, the laser operation with a threshold of 0.85 W and a maximum output power of 1.1 W is realized: the laser slope efficiency is 21.1%, and the optical conversion efficiency is 18.3%. All of the above results show that Nd:YSAG single crystal is a good solid state laser material, which is more favorable for Q-switched laser operation.关键词
Nd:YSAG/吸收/发光/LD抽运固体激光Key words
Nd:YSAG/absorption/fluorescence/laser diode pumped solid-state laser引用本文复制引用
鲁万成,孙敦陆,张庆礼,罗建乔,丁守军,窦仁勤,彭方,张会丽,王小飞,孙贵花..Nd:YSAG单晶的光谱和激光性能[J].物理学报,2017,66(15):152-158,7.基金项目
国家自然科学基金(批准号:51502292, 61405206)、国家重点研发计划(批准号:2016YFB0402101、中国科学院创新基金(批准号:CXJJ-16M251, CXJJ-15M055)和安徽省自然科学基金(批准号:608085ME91资助的课题. Project supported by the National Natural Science Foundation of China(Grant Nos. 51502292, 61405206), the National Key R&D Program of China(Grant No. 2016YFB0402101, the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant Nos. CXJJ-16M251, CXJJ-15M055), and the Anhui Provincial Natural Science Foundation, China(Grant No. 608085ME91. （批准号:51502292, 61405206）
