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Nd:GGG晶体生长、光谱性能及激光性能(英文)
作者:吕景霞 张莹 曾繁明 张学建 王成伟 刘景和  
单位:长春理工大学 长春理工大学 长春理工大学 长春理工大学 长春理工大学 长春理工大学 长春130022 长春130022 长春130022 长春130022 吉林建筑工程学院 长春130021 长春130022 中国兵器科学研究院 北京100089 长春130022 
关键词:提拉法  掺钕钆镓石榴石  光谱性能  激光性能 
分类号:O782
出版年,卷(期):页码:2008,36(6):821-824
DOI:
摘要:

采用提拉法生长掺钕钆镓石榴石(neodymium-doped gadolinium gallium garnet,Nd:GGG)激光晶体,选择最佳工艺参数:提拉速率为2~4mm/h;转速为20~40r/min;冷却速率为20℃/h。测试了晶体的吸收和荧光光谱,结果表明:主吸收峰位于808nm,主发射峰位于9430cm–1,对应于Nd3+的4F3/2–4I11/2跃迁。对晶体样品进行了激光性能测试。结果表明:当泵浦功率为900mW时,对泵浦光的吸收效率为85%,激光输出波长约为1μm,激光输出功率为305mW,激光阈值功率为380mW,光–光转换效率达57.8%,斜效率达57.6%。

The optimum processing parameters for growth of neodymium-doped gadolinium gallium garnet (Nd:GGG) laser crystal was studied by the Czochralski method. The absorption and fluorescence spectra as well as the laser performance of Nd:GGG were measured. The research results indicate that: (1) The optimal pulling rate is 2-4 mm/h,the optimal rotation rate is 20-40 r/min and the best cooling rate is 20 ℃/h. (2) The main absorption peak of Nd:GGG is at 808 nm and the fluorescence emission peak is at 9 430 cm-1,corresponding to the 4F3/2-4I11/2 emission band of the Nd3+. (3) The absorption efficiency of the pumping laser is 85%. When the pumping power is 900 mW,the wavelength of the output laser is about 1 μm,while the output power is 305 mW. The laser threshold is 380 mW. The optical to optical efficiency is 57.8%,and the slope efficiency is 57.6%.

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参考文献:

[1] REN Guoguang, HUANG Yunian. Present state and future of the tacti- cal high energy laser weapon [J]. Laser Infrared (in Chinese), 2002, 32(4): 211–212. [2] LIU Jinghe, SUN Jing, ZENG Fanming. Study on spectra properties of Nd:GGG crystal [J]. Rare Metal Mater Eng (in Chinese), 2006, 35(1): 59–61. [3] BRUNO Labranche, WU Qun, PIERRE Galarneau. Diode pumped CW and quasi-CW Nd:GGG (Ca, Mg, Zr) laser [J]. SPIE, 1998, 2 041: 326–331. [4] KLOPP P, GRIEBNER U, PETROV V, et al. Laser operation of the new stoichiometric crystal KYb(WO4)2 [J]. Appl Phys B, 2002, 74: 185–189. [5] ZHANG Qingli, YIN Shaotang, WANG Aihua. Research progress of the laser crystal GGG species [J]. J Quantum Electron (in Chinese), 2002, 19(6): 481–484. [6] ZHU Huanan. Solid state heat capacity strong laser [J]. Ground Anti-Aircraft Weapon (in Chinese), 2003, 1: 49–53. [7] FEDIN A V, RULEV A V, BASIEV T T, et al. Perspective Nd:GGG laser with phase conjugation in active medium [J]. SPIE, 2002, 4 644: 293–296. [8] ZENG Fanming, SUN Jing, LIU Jinghe, et al. Laser properties of Nd:Gd3Ga5O12 crystal [J]. J Chin Ceram Soc (in Chinese), 2005, 33(11):49–53.

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