KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Low-frequency fiber optic hydrophone based on weak value amplification | |
Luo, Zhengchun1; Yang, Yue1; Wang, Zhongmin1; Yu, Miao2; Wu, Chongjian2; Chang, Tianying1 ; Wu, Peng3 ; Cui, Hong-Liang1
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| 2020-08-31 | |
| 摘要 | A high-sensitivity low-frequency fiber optic hydrophone based on weak value amplification (WVA) is proposed and demonstrated. A polarization maintaining (PM) fiber with a length of 0.8 m wound around a polycarbonate (PC) tube is used as the sensing element. Theoretical analysis shows that the PM fiber in a WVA measurement scheme responds to underwater acoustic pressure with unprecedented sensitivity. The prototypical hydrophone based on such a scheme can sense underwater acoustic disturbance as weak as 1.3x10(-6) Pa/Hz(1/2) at 10 Hz, with a flat frequency response in the low-frequency band of 0.1-50Hz. The experimental result agrees well with the theoretical prediction to within 0.5 dB. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
| DOI | 10.1364/OE.400373 |
| 发表期刊 | OPTICS EXPRESS
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| ISSN | 1094-4087 |
| 卷号 | 28期号:18页码:25935-25948 |
| 通讯作者 | Chang, Tianying(tchang@jlu.edu.cn) ; Wu, Peng(wupeng@cigit.ac.cn) |
| 收录类别 | SCI |
| WOS记录号 | WOS:000565713200021 |
| 语种 | 英语 |
