湍流大气中组合激光传输特性分析

Huan Yang, Guochao Lao, L. Xue, W. Gao, Wantao Deng, H. Xia, Jiu Chen, Tianyu Chen
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引用次数: 0

摘要

阵列激光在大气中传播时,由于大气相干长度、平均风速和激光持续时间等因素的影响,会导致远场光束质量下降。本文建立了阵列激光传播模型和动态大气湍流相屏。用峰值强度和周向强度作为评价远场相干和非相干激光器光束质量退化的标准。结果表明:在较短的激光持续时间内,相干组合的光束质量优于非相干组合;而非相干和相干组合的光束质量随着激光持续时间的增加而逐渐减小和趋近。研究结果可为大功率激光系统在不同环境下选择最佳光束组合方式提供基础支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of propagation characteristics of combined laser in turbulent atmosphere
During the propagation of array laser in the atmosphere, due to the influence of atmospheric coherence length, average wind velocity and laser duration, the beam quality in the far field will be reduced. In this paper, an array laser propagation model and a dynamic atmospheric turbulence phase screen are constructed. The peak intensity and the circumferential intensity are used as the criteria to evaluate the beam quality degradation of coherent and incoherent lasers in the far field. The results show that the beam quality of coherent combining is better than that of incoherent combining in a short laser duration; However, the beam quality of incoherent and coherent combination decreases and approaches gradually with the increase of laser duration. The researches can provide basic support for selecting the best beam combining mode when the high-power laser system is used in different environments.
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