| CO2激光脉冲外差探测一阶统计特性分析 |
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| 引用本文： | 王春晖,王骐. CO2激光脉冲外差探测一阶统计特性分析[J]. 中国激光, 2003, 30(5): 476-480 |
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| 作者姓名： | 王春晖 王骐 |
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| 作者单位： | 哈尔滨工业大学光电子技术研究所可调谐激光技术国家重点实验室,黑龙江,哈尔滨,150001 |
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| 摘 要： | 从分析高斯本振光和爱里信号回波互相干函数 (或外差量子效率 )一阶统计量入手 ,推导出CO2 激光脉冲外差探测振幅、位相和波矢空间夹角匹配条件 ,其外差量子效率的最大理论值为 0 82。在离焦失准状态下 (即球像差 ) ,两束光的位相差主要由高斯本振光波前弯曲决定 ,并因此导致外差量子效率的降低。
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| 关 键 词： | 激光技术 激光成像雷达 外差探测 CO2激光器 |
| 收稿时间： | 2002-02-05 |
Analysis of 1st Order Statistic Specialty of CO2 Laser Pulse Heterodyne Detection |
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| WANG Chun hui,WANG Qi. Analysis of 1st Order Statistic Specialty of CO2 Laser Pulse Heterodyne Detection[J]. Chinese Journal of Lasers, 2003, 30(5): 476-480 |
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| Authors: | WANG Chun hui WANG Qi |
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| Abstract: | By analyzing the 1st order statistic specialty of the co coherence function of Gauss local field and Airy signal field, it gives the matching condition between the amplitudes, phases, and wave vectors of the signal beam and the local beam in CO 2 laser pulse heterodyne detection. In theory, the maximum of the heterodyne quantum efficiency is 0.82. In the condition of off focus, e.g. with spherical aberration, the phase difference between signal beam and local beam is mainly decided by the curvature of the Gauss local field which would lead to the reduction of the heterodyne quantum efficiency. |
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| Keywords: | laser technique laser imaging radar heterodyne detection CO 2 laser |
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