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Effects of Rayleigh backscattering on the stability of distributed feedback fiber laser sensors

机译：瑞利反向散射对分布式反馈光纤激光传感器稳定性的影响

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摘要

Rayleigh backscattering induces mode hopping of distributed feedback (DFB) fiber lasers in the sensor array, and the critical length related to Rayleigh backscattering limits the size of DFB fiber laser sensor networking. Based on a three-mirror cavity model, the critical length for a DFB fiber laser is derived. It increases nearly exponentially with the coupling coefficient for the ideal π-shifted DFB fiber lasers. The reflectivity of the sub-fiber Bragg grating at the lasing wavelength is the main factor to resist Rayleigh backscattering for a nonideal DFB fiber laser. The corresponding experiments have been carried out, and the critical length of larger than 150 m was achieved for 42-mm-long DFB fiber lasers.
机译：瑞利反向散射在传感器阵列中引起分布反馈（DFB）光纤激光器的模式跳变，与瑞利反向散射相关的临界长度限制了DFB光纤激光传感器网络的大小。基于三镜腔模型，得出了DFB光纤激光器的临界长度。对于理想的π位移DFB光纤激光器，其耦合系数几乎成倍增加。对于非理想DFB光纤激光器，子光纤布拉格光栅在激光波长处的反射率是抵抗瑞利背向散射的主要因素。已经进行了相应的实验，对于42毫米长的DFB光纤激光器，其临界长度大于150 m。

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  • 来源
    《Optical engineering》 |2014年第6期|066102.1-066102.5|共5页
  • 作者

    Tuanwei Xu; Meizhen Ren; Jun He; Gaosheng Fang; Fang Li; Yuliang Liu;

  • 作者单位

    Chinese Academy of Sciences, Institute of Semiconductors, Optoelectronic System Laboratory, P.O. Box 912, Beijing 100083, China;

    Chinese Academy of Sciences, Institute of Semiconductors, Optoelectronic System Laboratory, P.O. Box 912, Beijing 100083, China;

    Chinese Academy of Sciences, Institute of Semiconductors, Optoelectronic System Laboratory, P.O. Box 912, Beijing 100083, China;

    Chinese Academy of Sciences, Institute of Semiconductors, Optoelectronic System Laboratory, P.O. Box 912, Beijing 100083, China;

    Chinese Academy of Sciences, Institute of Semiconductors, Optoelectronic System Laboratory, P.O. Box 912, Beijing 100083, China;

    Chinese Academy of Sciences, Institute of Semiconductors, Optoelectronic System Laboratory, P.O. Box 912, Beijing 100083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    distributed feedback fiber laser; optical fiber sensor; mode hopping; Rayleigh backscattering;

    机译：分布式反馈光纤激光器光纤传感器模式跳变瑞利反向散射;

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