| 光学组合半导体激光器输出光束特性研究 |
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| 引用本文： | 张靳,黄磊,王东生,殷聪,巩马理. 光学组合半导体激光器输出光束特性研究[J]. 激光技术, 2007, 31(3): 228-231,241 |
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| 作者姓名： | 张靳 黄磊 王东生 殷聪 巩马理 |
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| 作者单位： | 清华大学,精密仪器系,北京,100084;清华大学,精密仪器系,北京,100084;清华大学,精密仪器系,北京,100084;清华大学,精密仪器系,北京,100084;清华大学,精密仪器系,北京,100084 |
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| 摘 要： | 为了评价光学组合半导体激光器的输出光束性能,采用两种方法从理论上分析了光学组合半导体激光器的输出光束的光束传播因子.第1种方法与传统堆栈式半导体激光器的光束质量评价方法类似,通过几何光学得到光束束宽;第2种方法采用管芯光强分布的类高斯模型计算输出光束的二阶矩进而得到光束束宽,最后均得到输出光束的光束传播因子与激光条单元数及激光条包含管芯数的关系.进行了3个激光条组成的光学组合半导体激光器的实验,获得输出功率120W,功率密度209W/cm2,光束平均间距1.1mm,整体光束传播因子M2=197.对比了两种方法及实验结果.结果表明,这两种方法可以用来估算光学组合半导体激光器的输出光束质量.
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| 关 键 词： | 激光光学 光学组合半导体激光器 光束质量 光束传播因子 二阶矩 |
| 文章编号： | 1001-3806（2007）03-0228-04 |
| 收稿时间： | 2006-05-08 |
| 修稿时间： | 2006-05-082006-07-16 |
Study on characteristics of output beam of combined optical diode lasers |
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| ZHANG Jin,HUANG Lei,WANG Dong-sheng,YIN Cong,GONG Ma-li. Study on characteristics of output beam of combined optical diode lasers[J]. Laser Technology, 2007, 31(3): 228-231,241 |
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| Authors: | ZHANG Jin HUANG Lei WANG Dong-sheng YIN Cong GONG Ma-li |
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| Affiliation: | Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China |
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| Abstract: | For the purpose of evaluating the performance of combined optical diode lasers, two approaches estimating beam propagation factor were analyzed. One was similar to the approach used in the traditional diode stack, calculating the beam width based on the geometry optics, the other was based on the similar Gaussian model of the emitter calculating the beam width by the definition of the second order moment of intensity distribution. Finally the dependence of the M^2 factor of the output beam on the number of the diode bars and the number of emitters per bar was deduced. An experiment on a three-bar combined optical diode laser was carried out, with output power of 120W, power density of 209W/cm^2, average pitch of 1. 1mm, and total beam propagation ratio M^2 = 197. The two approaches were compared through the experiment. The analysis results show that both these approaches are available in estimating the output beam quality of the optical combination diode lasers. |
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| Keywords: | laser optics combined optical diode lasers beam quality beam propagation ratio second order moments |
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