激光陀螺光电探测器光窗的设计  

Design of optical window for photo-detector in ring laser gyro

作　　者：胡志强[1] 姚合宝[1] 蒋军彪 王松伟[1] 朱冠芳[1] 

机构地区：[1]西北大学物理学系,陕西西安710069 [2]西安北方捷瑞光电科技有限公司,陕西西安710000

出　　处：《应用光学》2008年第4期576-579,共4页Journal of Applied Optics

摘　　要：用平面波计算拍频条纹间距时,因激光器中存在衍射效应,且实际光强分布为高斯型,故给光电探测器光窗尺寸计算带来很大误差(40%),导致系统不能正常工作。为此,以高斯光束为基础,利用光电探测器测得2路信号的相位差,通过数值计算得到2束光拍频条纹间距,由此计算得到理想相位差光电探测器的尺寸。最后,用实验验证了该设计方法的可行性,为RLG光电探测器光窗尺寸的设计提供了一种简单准确的方法。Because there is diffraction effect in laser and the laser intensity distribution is in Gauss form, a big error is introduced in the calculation of optical window size for the photo-detector （PD） when the spacing between the beat frequency fringes is computed with plane wave. Two steps are applied to the design. First, the phase difference of the two signals is detected by a PD. Then, based on Gauss beam, the spacing between the beat frequency fringes of the two beams is calculated to get the ideal size of the optical window. The method was verified with an experiment.

关 键 词：激光陀螺 光电探测器 光敏面 光窗设计 

分 类 号：TN249[电子电信—物理电子学]