Time division multiplexing array of fiber laser hydrophone using optical switch

GU Hongcan; CHENG Ling; HUANG Junbin; TANG Bo; LI Rizhong

doi:10.7510/jgjs.issn.1001-3806.2016.04.017

LASER TECHNOLOGY > 2016 > 40(4): 536-540. > DOI: 10.7510/jgjs.issn.1001-3806.2016.04.017

GU Hongcan, CHENG Ling, HUANG Junbin, TANG Bo, LI Rizhong. Time division multiplexing array of fiber laser hydrophone using optical switch[J]. LASER TECHNOLOGY, 2016, 40(4): 536-540. DOI: 10.7510/jgjs.issn.1001-3806.2016.04.017

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Time division multiplexing array of fiber laser hydrophone using optical switch

1.
Department of Weapon Engineering, Naval University of Engineering, Wuhan 430033, China;
2.
Research Centre, China Shipbuilding Industry Corporation, Beijing 100192, China

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Received Date: July 22, 2015
Revised Date: October 12, 2015
Published Date: July 24, 2016

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Abstract

Abstract

In order to reduce the cost and the size of a sensing system, a 4-element fiber laser hydrophone time division multiplexing array was established by using high-speed optical switches based on the characteristics of fiber laser sensing elements. The selective pulse width and the loss of the time division multiplexing array were analyzed after theoretical analysis and experimental verification. Because of time delay of the interferometer and switch speed of the optical switches, sampling frequency was limited. The acoustic detecting experiments show that the multiplexing signal can be acquired and demutiplexed correctly. The crosstalk between adjacent channels of the 4-element fiber laser hydrophone array is -17dB.
- sensor technique,
- hydrophone array,
- time division multiplexing,
- optical switch,
- fiber laser

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