摘要
氧碘高能激光近场存在较多的杂散光,这些光会严重影响光束传输和光束质量控制。通过对杂散光的产生机理、类型和传输规律的分析和模拟确定了不同类型杂散光的测量方法。利用两个能量计测量了30m通道自由传输时的传输效率,利用测试光阑获得了通道内杂散光角谱曲线和镜面散射光能量。实验表明30m通道自由传输时的能量损失约为5.2%,杂散光的角谱随着传输距离的增加逐渐增大,角谱也会随着光束质量的恶化显著增加。利用角谱曲线可以获得通道内任意位置处光阑上的热负荷,这为高能激光热管理技术奠定了坚实的基础。
A lot of stray light spreads in the near field of chemical oxygen-iodine laser, which has serious effects on beam propagation and beam quality control, Measurement methods for different types of stray light are brought out by analyzing and simulating generation mechanisms, types and propagation rules of the stray light. Efficiency for 30 m free propagation is measured by two energy meters. Angular power spectral curve in the channel and scattering energy reflected by the mirror are got by measurement diaphragms. Experimental results show that the energy loss after 30 m free propagation is 5.2 %, angular power spectrum increases with propagation distance and deterioration of beam quality increasing. The heat burthens on all diaphragms in the tunnel can be calculated with angular power spectral curve, which lays a good foundation of heat control technology for high energy laser.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2014年第2期151-157,共7页
Acta Optica Sinica
基金
国家863计划
关键词
激光光学
化学氧碘激光
杂散光
光阑
角谱
传输
laser optics
chemical oxygen-iodine laser
stray light
diaphragm
angular power spectrum
propagation
