激光／磁光复合功能晶体－Nd：Bi_4Ge_3O_（12）  

Laser/Magneto-Optic Compound Function Crystal-Nd:Bi_4Ge_3O_(12)

作　　者：胡关钦[1] 冯锡淇[1] 殷之文[1] 周复正[1] 杨义[1] 

机构地区：[1]中国科学院上海硅酸盐研究所无机功能材料开放实验室,中国科学院上海光学精密机械研究所

出　　处：《无机材料学报》1994年第3期275-280,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金

摘　　要：随着半导体二极管激光泵浦技术的发展，掺钕锗酸铋（Ｂｉ４Ｇｅ３Ｏ（１２））晶体重新成为一种引人注目的激光材料．本文给出Ｎｄ：ＢＧＱ在８００ｎｍ附近的光吸收和激发谱，以及１０６μｍ波段的受激发射性能．并首次测得它在１．０６μｍ处室温Ｖｅｒｄｅｔ常数为０．０３３’／ｃｍ·Ｇｓ．比ＦＲ－４磁光玻璃高２７％，这意味着，Ｎｄ：ＢＧＯ已成为目前唯一的激光／磁光复合功能材料．本文讨论了Ｎｄ：ＢＧＯ中各类缺陷的形成机制及消除办法，通过改进工艺参数，生长出光学性质优良、Ｎｄ２Ｏ３掺入量达到１．５Ｗｔ％的晶体．利用其自身的磁光效应，研制成二极管激光泵浦、自调ＱＮｄ：ＢＧＯ激光器，获得１００ｎｓ的稳定脉冲输出．The progress in diode laser pumping technology in recent years makes Nd:BGO of most attractive as laser material again. In this paper, the exciation spectrum of Nd:BGO crystal in near infrared at room temperature as well as the optical absorption spectrum and the fluouescence spectrum around 800urn were given. The room temperature Verdet Constant at 1.06μm of BGO crystal (70×20mm)was measured to be 0.033 min·cm(-1)G(-1), which is about 27% larger than that of FR-4 magneto-optic glass. This means that Nd:BGO has been a sole laser/magneto-optic compound function material. The mechanism of formation of different kinds of defects in Nd:BGO crystal were studied and the methods to remove these defects were also discussed. A 1.5wt% Nd2O3-doped BGO crystal with excellent optical properties was grown. A diode laser pumping self Q-Switched Nd:BGO laser has been made for the first time by the large Faraday effect in BGO crystal. Pulsed energy 2μJ with width of 100us has been detected.

关 键 词：掺钕 BGO 锗酸铋 晶体 磁光 激光 

分 类 号：TN244[电子电信—物理电子学]