激光技术Issue(3)：295-299,5.DOI:10.7510/jgjs.issn.1001-3806.2015.03.002
基于锁相放大器和 LabVIEW 的激光功率测量系统
Laser power measurement systems based on lock-in amplifiers and LabVIEW
曾贤贵 1夏晶 1胡同欢 1杨青林1
作者信息
- 1. 湖南大学物理与微电子科学学院，长沙410082
- 折叠
摘要
Abstract
In order to reduce the impact of noise on laser optical experiments , a lock-in amplifier and an optical chopper were used .The laser was modulated at a specific frequency by the chopper and the frequency was sent to the lock -in amplifier as a reference signal .The useful signal was extracted with the lock-in amplifier based on the coherent detection method.In order to relieve the operator’s labor during experiments, an automatic software system under LabVIEW software platform was developed to operate the experiments and record data automatically , which greatly simplified the operation process.The results show that measurement noise of this method reduced from 9.1% to 4.7% compared with laser intensity measurement with a power meter directly .The automatic software system saves more than 50% of time compared with manual recording of data .关键词
光电子学/降噪/锁相放大器/LabVIEW软件/激光功率Key words
optoelectronics/noise reduction/lock-in amplifier/LabVIEW software/laser power分类
信息技术与安全科学引用本文复制引用
曾贤贵,夏晶,胡同欢,杨青林..基于锁相放大器和 LabVIEW 的激光功率测量系统[J].激光技术,2015,(3):295-299,5.
