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摘要:光纤激光水听器信号解调系统,光纤激光水听器输出的激光从 输入端(1)通过单模光纤(2)传输至光纤3×3耦合器(3)的b端, 激光通过3×3耦合器分成三路输出,其中e端空置,激光由d端和 f端分成两路,两路激光干涉后的激光信号由3×3耦合器的a端和c 端输出,a端和c端的激光信号由光电探测器(8)接收,两个光电 探测器输出的二路V1(t)、V2(t)信号,经信号传输线(9)传输至解调 运算处理系统(10)得出声压的大小。本发明光纤激光水听器信号解 调系统,基于Michelson(迈克尔逊)非平衡光纤干涉仪,高分辨率、 高稳定性地解调出声压信号,并消除普通单模光纤干涉仪中偏振态随 机变化对干涉解调信号的影响。
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Abstract: The invention relates to a fiber laser hydrophone signal demodulating system. The laser output by a fiber laser hydrophone is transmitted to the terminal b of a 3x3 fiber coupler (3) through a single mode fiber (2) from an input terminal (1), the laser is output in three ways through the 3x3 coupler, wherein the terminal e is vacant, the laser is divided into two ways by the terminal d and the terminal f, the laser signal after interference of the two lasers is output by the terminal a and the terminal c of the 3x3 coupler, the laser signals of the terminal a and the terminal c are received by a photoelectric detector (8), and V1(t) signal and V2(t) signal output by two photoelectric detectors are transmitted to a demodulation operation processing system (10) by a signal transmission wire (9) to obtain sound pressure size. The fiber laser hydrophone demodulating system of the invention demodulates a sound pressure signal in high resolution and high stability based on a Michelson nonequilibrium fiber interferometer and eliminates influence of polarization random change on an interference demodulating signal in a common single mode fiber interferometer.
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申请人: 中国人民解放军海军工程大学
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Applicant: NAVAL UNIVERSITY ENG PLA[CN]
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地址: 430022湖北省********(隐藏)
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发明(设计)人: 黄俊斌 顾宏灿 李日忠 谭波
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Inventor: JUNBIN HUANG[CN]; HONGCAN GU[CN]; RIZHONG LI[CN]; BO TAN[CN]
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主分类号: G01H9/00(2006.01)I
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分类号: G01H9/00(2006.01)I G02F2/00(2006.01)I
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