Sudarshanam V S, Desu S B
Appl Opt. 1995 Mar 1;34(7):1177-89. doi: 10.1364/AO.34.001177.
A highly efficient optical polarization and phase modulator formed by the placement of a thin transparent piezofilm with indium tin oxide electrodes directly in the path of the output from an optical fiber is presented. Various configurations that differ in the clamping conditions, utilization of epoxy, and optical arrangement are presented. For a film thickness of 63.9 µm, a linear phase-shifting coefficient of 0.131 rad/voltage peak (Vp) at 2 kHz and of 0.508 rad/Vp at 7.4 kHz is demonstrated. An intrinsic birefringence of 0.0328 between the directions along the stretch and its perpendicular in the plane of the film has been measured. The polarization modulation coefficient was determined to be 0.323 rad/Vp at 8.423 kHz, corresponding to a half-wave voltage of 8.353 Vp. Applications of the device involving concurrent spatiotemporal polarization and phase modulation are indicated.
介绍了一种高效的光学偏振和相位调制器，它是通过将带有氧化铟锡电极的薄透明压电薄膜直接放置在光纤输出路径中形成的。文中给出了在夹持条件、环氧树脂的使用和光学布置方面存在差异的各种配置。对于厚度为63.9 µm的薄膜，在2 kHz时线性相移系数为0.131 rad/电压峰值（Vp），在7.4 kHz时为0.508 rad/Vp。已测量出薄膜平面内沿拉伸方向与其垂直方向之间的固有双折射为0.0328。在8.423 kHz时偏振调制系数确定为0.323 rad/Vp，对应半波电压为8.353 Vp。文中指出了该器件在同时进行时空偏振和相位调制方面的应用。
