Share Email Print
cover

Proceedings Paper • new

An interferometric fiber optic hydrophone with large upper limit of dynamic range
Author(s): Lei Zhang; Baoxi Kan; Baichao Zheng; Xuefeng Wang; Haiyan Zhang; Liangbin Hao; Hailiang Wang; Zhenxing Hou; Wenpeng Yu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Interferometric fiber optic hydrophone based on heterodyne detection is used to measure the missile dropping point in the sea. The signal caused by the missile dropping in the water will be too large to be detected, so it is necessary to boost the upper limit of dynamic range (ULODR) of fiber optic hydrophone. In this article we analysis the factors which influence the ULODR of fiber optic hydrophone based on heterodyne detection, the ULODR is decided by the sampling frequency fsam and the heterodyne frequency Δf. The sampling frequency and the heterodyne frequency should be satisfied with the Nyquist sampling theorem which fsam will be two times larger than Δf, in this condition the ULODR is depended on the heterodyne frequency. In order to enlarge the ULODR, the Nyquist sampling theorem was broken, and we proposed a fiber optic hydrophone which the heterodyne frequency is larger than the sampling frequency. Both the simulation and experiment were done in this paper, the consequences are similar: When the sampling frequency is 100kHz, the ULODR of large heterodyne frequency fiber optic hydrophone is 2.6 times larger than that of the small heterodyne frequency fiber optic hydrophone. As the heterodyne frequency is larger than the sampling frequency, the ULODR is depended on the sampling frequency. If the sampling frequency was set at 2MHz, the ULODR of fiber optic hydrophone based on heterodyne detection will be boosted to 1000rad at 1kHz, and this large heterodyne fiber optic hydrophone can be applied to locate the drop position of the missile in the sea.

Paper Details

Date Published: 25 October 2017
PDF: 11 pages
Proc. SPIE 10464, AOPC 2017: Optical Information and Network (Optical Fiber Sensors), 104641H (25 October 2017); doi: 10.1117/12.2285277
Show Author Affiliations
Lei Zhang, Beijing Institute of Aerospace Control Devices (China)
Baoxi Kan, Beijing Institute of Aerospace Control Devices (China)
Baichao Zheng, Beijing Institute of Aerospace Control Devices (China)
Xuefeng Wang, Beijing Institute of Aerospace Control Devices (China)
Haiyan Zhang, Beijing Institute of Aerospace Control Devices (China)
Liangbin Hao, Beijing Institute of Aerospace Control Devices (China)
Hailiang Wang, Beijing Institute of Aerospace Control Devices (China)
Zhenxing Hou, Beijing Institute of Aerospace Control Devices (China)
Wenpeng Yu, Beijing Institute of Aerospace Control Devices (China)


Published in SPIE Proceedings Vol. 10464:
AOPC 2017: Optical Information and Network (Optical Fiber Sensors)
Zi-Sen Zhao; Leping Wei; Yanbiao Liao; Weixu Zhang; Desheng Jiang; Wei Wang; Kenneth T. V. Grattan, Editor(s)

© SPIE. Terms of Use
Back to Top