高能激光室内传输热晕效应的数值分析
Numerical model for high energy laser indoor transmission
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摘要: 讨论了高能激光在室内传输通道内的数值模型及其算法。由于室内没有强迫对流（即静风，没有光束扫描），必须考虑热传导和浮力对流的作用。通过比较不考虑室内影响及同时考虑室内室外影响的两种结果发现：室内的热效应会使发射光束产生附加相位畸变，使焦平面光斑质量下降，如发射功率为10kW时，考虑室内影响时的环围能量半径是不考虑室内影响的3.1倍，Strehl比是其40%。
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关键词:
- 热晕.数值模拟.浮力对流
Abstract: The model for simulating the laser beam propagation through the beam path indoor was described. Because no heat removal occurs by forced convection in the beam path, thermal conduction and natural convection dominate. The results show that the thermal effect produced by the high energy laser in the beam path can distort the beam and affect the beam quality. Because of the thermal effect in the beam path, with 10kW laser power, the radius of encircled energy is 3.1 times that of no the thermal effect, and the Strehl ratio falls 60%.-
Key words:
- thermal blooming
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