传输缆扰动对光纤水听器输出相位干扰研究  

Study on the Interference of Transmission Cable Disturbance to the Output Phase of Fiber-Optic Hydrophone

作　　者：柯尊灵 吴昺炎[1] 黄赟[1] 陈震 刘后 孙凯敏 KE Zunling;WU Bingyan;HUANG Yun;CHEN Zhen;LIU Hou;SUN Kaimin(The 23rd Research Institute,CETC,Shanghai 201900,China;Shanghai University,Shanghai 200444,China)

机构地区：[1]中国电子科技集团公司第二十三研究所,上海201900 [2]上海大学,上海200444

出　　处：《光纤与电缆及其应用技术》2023年第5期1-5,共5页Optical Fiber & Electric Cable and Their Applications

摘　　要：传输缆受到应力、振动、温度变化等扰动作用,导致激光相位延迟发生变化,进一步可能对光纤水听器输出相位产生干扰。针对传感光信号单脉冲传输与双脉冲传输的不同情况,分析了传输缆扰动对光纤水听器输出相位产生干扰的机理,推导得到了相位干扰的表达式,证明了相位干扰信号的振幅与传输缆扰动信号的振幅与频率、光纤水听器的臂长差等参数均成正比,设计实验通过实测验证了理论分析的正确性。指出在可接受范围内应尽量减小光纤水听器的臂长差,以最大限度地抑制传输缆扰动造成的相位干扰。The transmission cable is disturbed by stress,vibration and temperature variation,resulting in the change of laser phase delay,which may further interfere with the output phase of fiber-optic hydrophone.In view of the different conditions of single-pulse transmission and double-pulse transmission of sensitive optical signal,the mechanism of interference of transmission cable disturbance to the output phase of fiber-optic hydrophone is analyzed,and the expression of phase interference is derived,which indicates that the amplitude of phase interference signal is proportional to the amplitude and frequency of transmission cable disturbance signal and the arm length difference of fiber-optic hydrophone.Experiments are designed and the correctness of the theoretical analysis is verified through actual measurement.It is pointed out that the arm length difference of fiber-optic hydrophone should be minimized in an acceptable range to minimize the phase interference caused by transmission cable disturbance.

关 键 词：传输缆扰动 光纤水听器 相位干扰 

分 类 号：TN247[电子电信—物理电子学] TN763