摘要
提出一种基于相位产生载波技术的光纤解调器,它可以给光纤检波器阵列提供光能并实现对光纤检波器阵列中光波相位携带震动信息的接收和解调.光纤解调器由光发射机、光接收机、供电电路及通信电路组成.光发射机发出携带调制载波的光脉冲,经过光学复用后注入光纤检波器阵列.通过光接收机对光纤检波器阵列敏感到携带地震信息的光波进行接收,经过光波的解复用后,对干涉信号进行光电转换、数据采集及信号解调,最终得到原始的地震数据.通信电路与GPS授时器、主缆的通信光纤以及光接收机的输出连接,给解调后的数据打时标,并实现与相邻解调器或地震记录仪的通信.
In this paper,the optical fiber demodulator based on phase generated carrier technology is proposed.It can provide optical energy to the fiber geophone array and realize the reception and demodulation of the vibration information carried by the light wave.The optical fiber demodulator is composed of the optical transmitter,the optical receiver,the power supply circuit and the communication circuit.The optical transmitter sends out the optical pulse carrying the modulation carrier,which is multiplexed and injected into the optical fiber geophone array.The optical receiver receives the light wave carried the seismic information of the optical fiber geophone array.After the optical wave is demultiplexed,the interference signal is subjected to photoelectric conversion,data acquisition and signal demodulation,and finally the raw seismic data is obtained.The communication circuit is connected with the GPS timing device,the main cable and the optical receiver to mark the demodulated data and realize the communication with the adjacent demodulator or the seismic recorder.
作者
李勤
李文韬
王志峰
LI Qin;LI Wentao;WANG Zhifeng(No.3 Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China)
出处
《电声技术》
2021年第9期59-63,共5页
Audio Engineering
基金
国家重点研发计划项目(No.2018YFF01013500)。
关键词
光学干涉
数据采集
相位产生载波
光纤解调器
optical interference
data acquisition
phase generated carrier
optical fiber demodulator
作者简介
李勤(1983-),男,博士,高级工程师,研究方向为光纤传感、光电子技术、震动传感技术、光电信号处理等。
