基于FPGA的单频激光干涉仪高速相位检测器设计与实现  

Design and Implementation of FPGA-based High-speed Phase Detector in Single-frequency Laser Interferometer

作　　者：闫冠屹[1] 谌雅琴[1] 孙利群[1] 章恩耀[1] 

机构地区：[1]清华大学精密测试技术及仪器国家重点实验室,北京100084

出　　处：《光电子技术》2012年第1期11-14,共4页Optoelectronic Technology

基　　金：国家科技重大专项资助项目(2009zx04012-61-02)

摘　　要：设计并实现了一种对正交信号进行高速相位检测的FPGA电路,并将其成功应用于自制单频激光干涉测长系统中。该电路主要采用CORDIC算法并使用流水线结构,同时为了矫正实际测量时正交信号存在的畸变,增加了信号修正处理部分。仿真和实验结果表明该电路稳定可靠,满足高速、高精度相位检测的需求。A high-speed quadrature-signal phase detection circuit is designed for single-frequency laser interferometer system.A pipelined CORDIC algorithm is adopted in the implementation.The section of signal correction circuit is added to correct the quadrature-signal distortion in the actual interferometer system. Simulation and experiment results show that the designed circuit is very stable and reliable in high-speed and high-precision phase detection.

关 键 词：激光干涉仪 现场可编程门阵列 相位检测 坐标旋转计算机 

分 类 号：TH744.3[机械工程—光学工程]