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Measurement error induced by the power-frequency delay of the light source in optical correlation-domain distributed Brillouin sensors

机译:光源中光源的功率延迟引起的测量误差在光学相关域分布式布里渊传感器中的光源

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摘要

Direct current modulation of a semiconductor laser is a key method adopted in most optical correlation-domain distributed Brillouin sensors such as Brillouin optical correlation-domain analysis (BOCDA) and reflectometry (BOCDR) for localizing the sensing position by synthesis of an optical coherence function. We report that distributed measurement of Brillouin frequency by the BOCDA or BOCDR system can suffer significant distortion caused by phase delay between output power and frequency variations of the modulated light source. We calculate characteristics of the distortion by numerical simulations, and compare the results with experimental data obtained by a BOCDA system for confirmation. Our results show that a maximum error of more than 30 MHz can occur in Brillouin frequency measured under ordinary operating conditions with MHz-order direct current modulation. (c) 2018 Optical Society of America
机译:半导体激光器的直流调制是在大多数光学相关域分布布里渊传感器中采用的关键方法,例如布里渊光学相关域分析(BOCDA)和反射测量法(BOCDR),用于通过合成光学相干函数定位感测位置。 我们报告说,通过Bocda或Bocdr系统的Brillouin频率的分布测量可以遭受由调制光源的输出功率和频率变化之间的相位延迟引起的显着变化。 我们通过数值模拟计算失真的特性,并将结果与由Bocda系统获得的实验数据进行比较以确认。 我们的结果表明,在普通操作条件下,在具有MHz订购直流调制的普通操作条件下,在布里渊频率中可能发生超过30 MHz的最大误差。 (c)2018年光学学会

著录项

  • 来源
    《Optics Letters》 |2018年第20期|共4页
  • 作者

    Song Kwang Yong; Choi Jae Ho;

  • 作者单位

    Chung Ang Univ Dept Phys 84 Heukseok Ro Seoul 06974 South Korea;

    Chung Ang Univ Dept Phys 84 Heukseok Ro Seoul 06974 South Korea;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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