一种应用于偏频锁定激光系统的多功能测频电路  

A multi-functional frequency measurement circuit for laser frequency offset locking system

作　　者：白巍凯 刘涛[1,2] 董瑞芳[1,2] 张首刚[1,2] 刘娅[1,4] 邓雪[1,2] 陈玖朋 高静[1,2] 刘杰[1,2] BAI Wei-kai LIU Tao DONG Rui-fang ZHANG Shou-gang LIU Ya DENG Xue CHEN Jiu-peng GAO Jing LIU Jie(National Time Service Center, Chinese Academy of Science, Xi＇an 710600, China Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China University of Chinese Academy of Sciences, Beijing 100049, China Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]中国科学院大学,北京100049 [4]中国科学院精密导航定位与定时技术重点实验室,西安710600

出　　处：《时间频率学报》2017年第1期1-10,共10页Journal of Time and Frequency

基　　金：国家自然科学基金委重大科研仪器设备研制专项(61127901);国家自然科学基金资助项目(11273024;6102502;11403031);中组部"青年拔尖人才支持计划"项目(组厅字〔2013〕33号);中国科学院科技创新"交叉与合作团队"资助项目(中国科学院人教字〔2012〕119号);中国科学院重点部署资助项目(KJZD-EW-W02)

摘　　要：针对偏频锁定激光系统需要精密频率测量以及频率电压转换等需求,设计了一种基于FPGA(field programmable gate array)的多功能测频电路,实现了抗噪数字转方波电路,在8~20 MHz范围内的测频平均误差为0.001 56%,具有频率转电压与整数分频功能。目前本测频电路已应用于偏频锁定激光系统之中,将两台激光器的频差从35 MHz/h稳定在17 kHz/h以内。According to the requirements of precision frequency measurement, conversion from frequency into voltage, and so on, for laser system with frequency offset locking, this paper demonstrates a multi-functionalfrequency measuring circuit based on FPGA. By using the low noise digital square wave switching circuit, the average error for the developed frequency meter in the frequency measurement within 8 MHz to 20 MHz is 0.00156%, and it has the functions of frequency-voltage conversion and integer frequency division. The frequency measuring circuit has been applied to the frequency offset locking laser system, and has reduced the frequency difference between the two lasers from 35 MHz/h to 17 kHz/h.

关 键 词：频率测量 FPGA 频率电压转换 偏频锁定 

分 类 号：TM935.1[电气工程—电力电子与电力传动]