激光技术, 2019, 43 (1): 69, 网络出版: 2019-01-22
-OTDR系统中的相位解调方法研究进展
Research progress of phase demodulation in -OTDR system
传感器技术 相位解调 相位生成载波解调法 3×3耦合器解调法 数字相干IQ解调法 sensor technique phase sensitive optical time-domain reflectometer -OTDR phase demodulation phase generation carrier demodulation method 3×3 coupler demodulation method digital coherent in-phase/quadrature(IQ) demodulat
摘要
随着相位敏感光时域反射计（-OTDR）技术的发展与应用, 传统的幅度解调方法已经很难满足人们对高质量传感的需求, 而相位解调方法凭借其对相位信息解调的高灵敏性和高精确度的优势, 近年来引起了国内外的广泛关注。综述了-OTDR系统中相位解调方法的研究进展, 介绍了相位生成载波解调法、基于3×3耦合器的解调法和数字相干IQ解调法3种-OTDR系统中的相位解调方法, 并简单分析了这几种方法的优缺点。对未来基于-OTDR的传感系统中解调方法的优化及新方法的提出具有重要的意义。
Abstract
With the development and application of phase sensitive optical time-domain reflectometer (-OTDR) technology, traditional amplitude demodulation method can not meet the needs of high quality sensing. Phase demodulation method has the advantages of high sensitivity and high accuracy in demodulation of phase information. In recent years, it has attracted wide attention at home and abroad. The research progress of phase demodulation in -OTDR system is reviewed. Demodulation methods based on phase generated carrier (PGC), 3×3 coupler and digital coherent input-quadrature are introduced respectively. The advantages and disadvantages of these methods are simply analyzed.
王磊, 李永倩, 张立欣, 李红. -OTDR系统中的相位解调方法研究进展[J]. 激光技术, 2019, 43(1): 69. WANG Lei, LI Yongqian, ZHANG Lixin, LI Hong. Research progress of phase demodulation in -OTDR system[J]. Laser Technology, 2019, 43(1): 69.
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