| 激光二极管端面抽运Nd∶YVO4固体激光器热致光束畸变非对称的平衡 |
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| 引用本文： | 林强,王宪涛,朱健强.激光二极管端面抽运Nd∶YVO4固体激光器热致光束畸变非对称的平衡[J].中国激光,2007,34(10):1371-1374. |
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| 作者姓名： | 林强 王宪涛 朱健强 |
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| 作者单位： | 中国科学院上海光学精密机械研究所高功率激光物理联合实验室 上海201800 |
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| 摘 要： | 由于a轴切割Nd∶YVO4晶体的非对称性,使得激光二极管(LD)端面抽运Nd∶YVO4固体激光器不同于Nd∶YAG激光器,输出的激光经常产生非对称结果。用有限元法分析激光二极管端面抽运a轴切割Nd∶YVO4固体激光器的晶体热效应,包括温度分布、内部应力和产生的形变。分析结果表明端面抽运a轴切割Nd∶YVO4晶体产生了椭球热透镜效应。从结构方面和抽运方面提出了热透镜非对称性的平衡方法,实验验证了方法的可行性。
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| 关 键 词： | 激光器 固体激光器 Nd∶YVO4晶体 热畸变 椭球热透镜 |
| 文章编号： | 0258-7025（2007）10-1371-04 |
| 收稿时间： | 2007/4/2 |
| 修稿时间： | 2007-04-02 |
Balance of Asymmetry of Thermal Beam Distortion in Laser Diode End-Pumped Nd∶YVO4Solid State Lasers |
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| LIN Qiang, WANG Xian-tao, ZHU Jian-qiang.Balance of Asymmetry of Thermal Beam Distortion in Laser Diode End-Pumped Nd∶YVO4Solid State Lasers[J].Chinese Journal of Lasers,2007,34(10):1371-1374. |
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| Authors: | LIN Qiang WANG Xian-tao ZHU Jian-qiang |
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| Affiliation: | Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai 201800, China |
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| Abstract: | The asymmetry of a-cut Nd∶YVO4 leads to asymmetrical laser output from laser diode (LD) end-pumped Nd∶YVO4 solid state laser, which differs from Nd∶YAG laser. The finite element was applied to analyze the thermal effect of LD end-pumped a-cut Nd∶YVO4 crystal, including temperature distribution, internal stress and its deformation. The results indicate that the thermal lens of end-pumped a-cut Nd∶YVO4 crystal takes the ellipsoidal distribution. The method of balancing the asymmetry of thermal lens was put forward by the way of structure and pumping, and experimentally proved feasible. |
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| Keywords: | lasers solid state lasers Nd∶YVO4 crystal thermal distortion ellipsoidal thermal lens |
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