光学学报, 2019, 39 (7): 0712001, 网络出版: 2019-07-16   

基于3×3耦合器干涉仪的正负反馈判断及高频振动探测研究 下载: 899次

Positive and Negative Feedback Judgment and High-Frequency Vibration Detection by Interferometer Based on 3×3 Coupler
作者单位
电子科技大学物理学院, 四川 成都 611731
摘要
研究了基于3×3耦合器的光纤马赫-曾德尔干涉仪的三路输出干涉信号的特点,针对相位衰落问题,提出了一种根据所得的正交信号来判断反馈正负性的方案。实验通过LabVIEW软件来实现正交信号的获得及反馈输出信号的处理。测量和分析得到了直接输出反馈信号时会出现干涉信号短暂偏离稳定点的情况,整个过程的时间约为35 ms,而采用所提反馈正负判断方案后,相位稳定所需时间约为18 ms。通过一个光纤准直聚焦系统把光入射到被测物体表面并接收反射光,探测到了与输入信号频率一致的1.5 MHz的高频振动信号。验证了正负反馈判断方案及设计干涉系统的可行性和有效性。
Abstract
This study investigates the characteristics of the three-channel output interference signals from a fiber Mach-Zehnder interferometer based on a 3×3 coupler. The phase-fading problem is solved using a scheme that judges the positive and negative feedback based on the orthogonal signals. The LabVIEW software is used to realize the acquisition of orthogonal signals and the processing of feedback output signals. Measurement and analysis reveal that when the feedback signal is directly output, the interference signal briefly deviates from the stable point. The whole process requires approximately 35 ms. However, the proposed feedback-judgment scheme reduces the phase-stabilization time to approximately 18 ms. An optical-fiber collimation focusing system directs the light to the surface of the test object and receives the reflected light. A high-frequency (1.5 MHz) vibrational signal consistent with the input signal frequency is detected. The feasibility and effectiveness of the proposed feedback-judgment scheme and designed interference system are verified.

井帅奇, 黄磊, 董文辉, 荣健. 基于3×3耦合器干涉仪的正负反馈判断及高频振动探测研究[J]. 光学学报, 2019, 39(7): 0712001. Shuaiqi Jing, Lei Huang, Wenhui Dong, Jian Rong. Positive and Negative Feedback Judgment and High-Frequency Vibration Detection by Interferometer Based on 3×3 Coupler[J]. Acta Optica Sinica, 2019, 39(7): 0712001.

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