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弹光效应双反射膜是一种各向异性的高反射膜。在预加了应力的基片上镀制高反射膜 ,然后撤去基片上的预加应力 ,则基片上因弹性变形而产生的应变便转移到了膜系上。由于弹光效应使膜系成为各向异性的 ,从而使垂直入射光束的两个正交偏振反射分量有了一定的相对相位延迟。理论分析和实验证明 ,选择好膜系结构 ,确定好中心波长 ,并经优化 ,在工作波长处可以得到较大的相位色散 ,施加 10 0 N的力就能在正交方向获得 1.8°的相位差而反射率保持不变 ;此膜系用于氦氖激光器 ,可制出频差为 5 MHz量级的双频激光器。文中给出了一个弹光效应的双反射膜的结构参数和数值计算结果。
Elastic effect Double reflection film is an anisotropic high reflection film. Placing a highly reflective film on the pre-stressed substrate and then removing the pre-stress on the substrate transfers the strain due to the elastic deformation of the substrate to the film system. Due to the catadioptric effect, the film system becomes anisotropic, giving a certain relative phase delay to the two orthogonally polarized reflection components of a vertically incident beam. Theoretical analysis and experimental results show that the choice of a good film structure, to determine a good center wavelength, and optimized to obtain larger phase dispersion at the operating wavelength, the application of 10 0 N force can be obtained in the orthogonal direction of 1.8 ° Poor and reflectivity remains unchanged; this film is used for helium-neon lasers to produce dual-frequency lasers with a frequency offset of 5 MHz. In this paper, the structural parameters and numerical results of a double-reflection film with a light-emitting effect are given.