摘要
阐述了平行和楔形衬底复合型输出耦合镜(HOC)的反射率、透射率和损耗的计算方法,特别引入了品质因子进行损耗分析,可正确评价HOC质量的优劣。模拟了楔形衬底中楔角的变化对F-P效应调制的改善程度,楔角增大到0.3°时,HOC的透射率对波长和衬底厚度的微小变化不再敏感。楔形衬底使输出THz光斑在y方向上发生畸变,但0.3°楔角时输出光斑仍可保持较好的高斯形状。
This research presents the calculation method of transmittance,reflectance and loss for hybrid output coupler（HOC）.We introduce Q factor for loss analyses to evaluate the quality of HOC.We simulate the suppression of F-P etalon effect and distortion of output THz beam pattern with a wedged substrate.A 0.3°wedge angle makes transmittance not sensitive to small change of wavelength and substrate thickness.The distortion introduced by the 0.3°wedge angle will not dramatically change the Gaussian beam pattern.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2015年第4期137-140,共4页
High Power Laser and Particle Beams
基金
中国工程物理研究院发展基金项目(TH2012-020508)
