光开关消光比对光纤检波器阵列串扰的影响

刘飞; 周娴; 张敏

doi:10.11959/j.issn.2096-3750.2022.00297

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光开关消光比对光纤检波器阵列串扰的影响

理论与技术 | 更新时间：2024-08-16

- 光开关消光比对光纤检波器阵列串扰的影响
- Influence of the optical switch’s extinction ratio on the crosstalk in fiber-optic seismometer array
- 物联网学报 2022年6卷第4期页码：65-71
- 作者机构：
  
  1. 北京科技大学计算机与通信工程学院，北京 100083
  2. 北京大学北京天然气水合物国际研究中心，北京 100871
  3. 北京大学东莞光电研究院，广东东莞 523808
- 作者简介：
  
  [ "刘飞（1990- ），男，博士，北京科技大学讲师，主要研究方向为光纤传感器及其解调方法等" ]
  [ "周娴（1982- ），女，北京科技大学教授、博士生导师，主要研究方向为光纤通信、光纤传感等" ]
  [ "张敏（1971- ），男，北京大学副研究员，主要研究方向为光纤传感、痕量气体探测、水合物储层监测等" ]
- 基金信息：
  
  国家自然科学基金资助项目;The National Natural Science Foundation of China(61905004);中央高校基本科研业务费资助项目;The Fundamental Research Funds for the Central Universities(FRF-TP-20-067A1Z)
- DOI：10.11959/j.issn.2096-3750.2022.00297
  中图分类号： TP247；TN249
- 纸质出版日期：2022-12-30，
  
  网络出版日期：2022-12，
- 稿件说明：
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刘飞, 周娴, 张敏. 光开关消光比对光纤检波器阵列串扰的影响[J]. 物联网学报, 2022,6(4):65-71.

FEI LIU, XIAN ZHOU, MIN ZHANG. Influence of the optical switch’s extinction ratio on the crosstalk in fiber-optic seismometer array. [J]. Chinese journal on internet of things, 2022, 6(4): 65-71.
刘飞, 周娴, 张敏. 光开关消光比对光纤检波器阵列串扰的影响[J]. 物联网学报, 2022,6(4):65-71. DOI： 10.11959/j.issn.2096-3750.2022.00297.

FEI LIU, XIAN ZHOU, MIN ZHANG. Influence of the optical switch’s extinction ratio on the crosstalk in fiber-optic seismometer array. [J]. Chinese journal on internet of things, 2022, 6(4): 65-71. DOI： 10.11959/j.issn.2096-3750.2022.00297.

摘要

光开关是时分复用光纤检波器阵列的重要器件，对阵列串扰有着不可忽视的影响。在基于差分延时外差的解调方案下，分析了光纤检波器阵列中串扰的来源，推导了有限消光比下检波器所受串扰的表达式。通过仿真得到了在不同的阵列规模下，光开关消光比与检波器串扰之间的关系，即串扰基本随着光开关消光比增大而线性减小，随着阵列规模增大而线性增大。实验中搭建了8基元的检波器阵列，采用具有不同消光比的光开关（声光调制器和电光调制器）产生脉冲光信号，验证了理论推导以及仿真结果的正确性。

Abstract

Optical switch is one of the key components in the time-division multiplexing fiber-optic seismometer array and has significant influence on the crosstalk of the array.The source of crosstalk in the array was analyzed based on differential delay heterodyne demodulation scheme.The expression of crosstalk appearing in the seismometer’s output was deduced with the limited extinction ratio.Via simulation

the relationship between the extinction ratio of optical switch and the seismometer’s crosstalk was presented under different array scales

i.e.basically the crosstalk decreases linearly with the increase of optical switch’s extinction ratio

and increases linearly with the increase of the array scale.Finally

an 8-element fiber-optic seismometer array was set up in the experiment

on which different optical switches (acousto-optic modulator and electro-optic modulator) owning distinct extinction ratios could be applied to generate pulse light.Experimental results verified the theoretical analysis as well as the simulation results.

关键词

光纤检波器阵列时分复用消光比串扰

Keywords

fiber-optic seismometer arraytime-division multiplexingextinction ratiocrosstalk

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