激光与光电子学进展, 2019, 56 (15): 150602, 网络出版: 2019-08-05   

基于斐索干涉的超弱光纤光栅水听器阵列实验研究 下载: 1347次封面文章

Experimental Study on Ultra-Weak Fiber Bragg Grating Hydrophone Arrays Based on Fizeau Interference
作者单位
1 武汉理工大学光纤传感技术国家工程实验室, 湖北 武汉 430070
2 武汉理工大学信息工程学院, 湖北 武汉 430070
3 武汉理工大学机电学院, 湖北 武汉 430070
4 海军工程大学兵器工程系, 湖北 武汉 430033
摘要
研究了一种基于斐索干涉的超弱光纤光栅(uwFBG)水听器阵列系统。通过拉丝塔在线制备光纤光栅技术构建超弱光纤光栅水听器阵列,使用反正切算法解调信号,实现了2~2000 Hz宽频带内水声信号的振幅、频率和相位的同时测量。在频率为2 Hz时,系统水声信号的相位声压灵敏度可达-135.81 dB(re rad/μPa),灵敏度为2755.49(μPa/ Hz),信噪比为43.785 dB。传感器复用实验结果证实该系统可以同时解调不同位置的水声信息,系统的相位声压灵敏度随着传感器腔长的增加而增加,且具有很好的稳定性,表明系统在高灵敏度水声传感、甚低频声学探测、深海监测等方面具有广阔的应用前景。
Abstract
Herein, an ultra-weak fiber Bragg grating hydrophone array system based on Fizeau interference is demonstrated. The ultra-weak fiber Bragg grating hydrophone array is constructed via on-line preparation of a fiber Bragg grating using a drawing tower. The amplitude, frequency, and phase of underwater acoustic signals in a wide frequency range of 2-2000 Hz are simultaneously measured using the signal demodulated by the arc-tangent algorithm. The phase acoustic-pressure sensitivity of the system hydroacoustic signals at 2 Hz reaches -135.81 dB(re rad/μPa). The sensitivity is 2755.49 μPa/ Hz, and the signal-to-noise ratio is 43.785 dB. The experimental results of sensor multiplexing prove that the system can demodulate underwater acoustic information at different locations. Furthermore, the phase acoustic-pressure sensitivity of the system increases with the increasing cavity length of the sensor. The system exhibits very good stability, indicating the possibility of extensive applications in high-sensitivity underwater acoustic sensing, very low frequency acoustic detection, deep-sea monitoring, and other fields.

徐倩楠, 周次明, 范典, 庞彦东, 赵晨光, 陈希, 黄俊斌, 顾宏灿. 基于斐索干涉的超弱光纤光栅水听器阵列实验研究[J]. 激光与光电子学进展, 2019, 56(15): 150602. Qiannan Xu, Ciming Zhou, Dian Fan, Yandong Pang, Chenguang Zhao, Xi Chen, Junbin Huang, Hongcan Gu. Experimental Study on Ultra-Weak Fiber Bragg Grating Hydrophone Arrays Based on Fizeau Interference[J]. Laser & Optoelectronics Progress, 2019, 56(15): 150602.

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