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基于正交相干接收的布里渊斯托克斯与反斯托克斯散射光分离技术

Separation of Brillouin Stokes Scattering and Anti-Stokes Scattering Based on Orthogonal Coherent Receiving

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摘要

提出并设计了一种基于正交光相干接收的光载波上下边带信号分离技术, 可用在布里渊散射分布式光纤传感系统中, 实现对斯托克斯光和反斯托克斯光的无损分离。该技术利用正交光相干接收技术, 保留了光场的相位信息, 使光载波的上下边带在不同的输出端口处于相干叠加或相干抵消状态, 从而实现上下边带的分离。结果表明, 该技术可使光载波的上下边带分别从两个端口输出, 且输出与输入信号功率线性相关, 具有很好的线性度。分离之后的上边带光信号和下边带光信号之间的串扰小于-20 dB。与常用的光学滤波器方法相比, 该技术无温度敏感器件, 具有很好的稳定性和可靠性。

Abstract

We propose a technique to separate the upper and the lower sidebands of an optical carrier based on orthogonal optical coherent receiving, which can be used in Brillouin scattering distributed fiber-optic sensing systems to separate Stokes and anti-Stokes scattering without loss. In the orthogonal optical coherent receiving technology, phase information of the optical field is preserved. So the upper and the lower sidebands can be arranged in coherent addition or cancellation states in different outputs, and the separation of the upper and the lower sidebands is realized. The results show that the technique can output the upper and lower sidebands from different ports, with a good linear relationship between input power and output power. The crosstalk between the separated upper and lower sidebands can be less than -20 dB. Compared with frequently employed optical filtering, this technique has no temperature sensitive component and shows good stability and robustness.

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中图分类号:TN247

DOI:10.3788/cjl201845.0706003

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金(11474133)、广州市科技计划(201707010338)

收稿日期:2017-12-21

修改稿日期:2018-03-06

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李威:暨南大学光子技术研究院, 广东 广州 510632
刘伟民:暨南大学光子技术研究院, 广东 广州 510632
周黎明:暨南大学光子技术研究院, 广东 广州 510632
程凌浩:暨南大学光子技术研究院, 广东 广州 510632
关柏鸥:暨南大学光子技术研究院, 广东 广州 510632

联系人作者:程凌浩(chenglh@ieee.org)

备注:李威(1993-), 男, 硕士研究生, 主要从事分布式光纤传感方面的研究。E-mail: levis0513@163.com

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引用该论文

Li Wei,Liu Weimin,Zhou Liming,Cheng Linghao,Guan Baiou. Separation of Brillouin Stokes Scattering and Anti-Stokes Scattering Based on Orthogonal Coherent Receiving[J]. Chinese Journal of Lasers, 2018, 45(7): 0706003

李威,刘伟民,周黎明,程凌浩,关柏鸥. 基于正交相干接收的布里渊斯托克斯与反斯托克斯散射光分离技术[J]. 中国激光, 2018, 45(7): 0706003

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