光学学报, 2014, 34 (3): 0312005, 网络出版: 2014-02-26
基于单法布里珀罗标准具的双频率四边缘鉴频光电探测技术
Dual-Frequency Quad-Edge Frequency Discrimination Photoelectric Detection Technique Based on Single Fabry-Perot Etalon
激光技术 F-P标准具 四边缘技术 双频率 速度 laser technology Fabry-Perot etalon quad-edge technique dual frequency velocity
摘要
提出了一种基于单固体法布里珀罗(F-P)标准具和可调谐半导体激光器的高精度鉴频新技术双频率四边缘技术。导出了F-P标准具反射谱和透射谱函数表达式,分析了双频率四边缘技术的鉴频原理;根据鉴频原理,给出了鉴频系统结构及相应的探测信号分析处理方法;进一步分析了噪声引起的测量误差,导出了具体的误差公式;与传统的基于F-P标准具双边缘鉴频技术的探测性能做了对比分析。结果表明,该技术通过对F-P标准具的透射和反射信号同时探测,鉴频精度将提高2.82~3.03倍,而且由于采用的是单固体F-P标准具,光路简单且系统成本低。
Abstract
A new frequency discrimination technique with high-precision called dual-frequency quad-edge technique which bases on a single solid Fabry-Perot (F-P) etalon and a tunable semiconductor laser is proposed. The function expressions of the reflection spectrum and the transmission spectrum are deduced. The frequency discrimination principle of dual-frequency quad-edge technique is analyzed. According to the frequency discrimination principle, the architecture of the frequency discrimination system and the corresponding analysis and processing methods for detection signals are given. Then, the measurement error caused by noise also is analyzed and the specific error formula is derived. The detection performance of this frequency discrimination technique is analyzed by comparing with that of the conventional double-edge frequency discrimination technique base on F-P etalon. The results show that the frequency discrimination accuracy of this frequency discrimination technique can improve 2.82 to 3.03 times through the simultaneous detection of the transmitted and reflected signals from the F-P etalon, while the optical path of this new technique is simple and the system cost is low due to the use of a single solid F-P etalon.
沈法华, 於爱爱, 董吉辉, 夏益祺, 刘成林. 基于单法布里珀罗标准具的双频率四边缘鉴频光电探测技术[J]. 光学学报, 2014, 34(3): 0312005. Shen Fahua, Yu Aiai, Dong Jihui, Xia Yiqi, Liu Chenglin. Dual-Frequency Quad-Edge Frequency Discrimination Photoelectric Detection Technique Based on Single Fabry-Perot Etalon[J]. Acta Optica Sinica, 2014, 34(3): 0312005.