双平行平板分光特性的数值模拟与分析  

Numerical Simulation and Analysis on Beam Spliting Performance of Two Parallel Plates

作　　者：杨静蕊[1,2,3] 侯霞[1,2] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]上海市全固态激光器与应用技术重点实验室,上海201800 [3]中国科学院研究生院,北京100049

出　　处：《中国激光》2010年第4期923-928,共6页Chinese Journal of Lasers

摘　　要：分析了双平行平板的分光特性,并提出了优化其分光特性的方法。平行放置的平行平板可将入射光束同时分为多个峰值功率密度不同的光束出射,应用电荷耦合器件(CCD)相机接收出射光斑,出射光斑的峰值功率密度差异(DMPF)要保证小。分析了平行平板板间距和光束入射角对出射光斑的峰值功率密度差异的影响,结果表明,合理选取板间距和入射角可使光斑的峰值功率密度差异减小。当平板膜特性和入射激光中心波长确定时,最优板间距与光束的瑞利长度呈递增关系,最优入射角保持稳定,相应条件下的光斑峰值功率密度差异随瑞利长度的变化有轻微浮动。Spliting performance of two parallel plates is analyzed and a design method is presented to optimize their spliting performance.Two parallel plates parallel to each other split one incident laser beam into multiple beams which are detected by a CCD camera.Because of the use of CCD camera,difference of maximum power density between received laser faculae（DMPF） should be made as little as possible.Effect of distance between plates and incident angle on difference of laser faculae is analyzed.And the calculation results show that reasonable selection of distance between plates and incident angle can minimize DMPF.The optimum distance between plates increases as Rayleigh length of laser beam increases while the optimum incident angle keeps stable under the condition of fixed coated film and fixed central wavelength of laser beam.And DMPF under corresponding optimum conditions fluctuates as Rayleigh length increases.

关 键 词：测量 光束质量 实时测量 分光 双平行平板 数值模拟 

分 类 号：TN247[电子电信—物理电子学]