Laser & Optoelectronics Progress, Volume. 59, Issue 23, 2300002(2022)
Research Progress of φ-OTDR Noise Reduction Processing
The phase-sensitive optical time domain reflectometer (φ-OTDR) is characterized by distributed sensing, fast response, simple structure, long detection distance, and anti-electromagnetic interference. However, due to the use of a light source with a long coherence length, the backward Rayleigh scattering of the pulsed light interferes inside the optical pulse, thereby affecting the φ-OTDR by factors, such as coherent fading, polarization fading, and common mode noise, which sharply reduce the signal-to-noise ratio. Therefore, this article discusses the working principle of φ-OTDR, summarizes and analyzes recent methods for reducing various types of noise in φ-OTDR system, and proposes future development directions for noise reduction in φ-OTDR systems.
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Ke Li, Yandong Gong, Zhuo Zhang. Research Progress of φ-OTDR Noise Reduction Processing[J]. Laser & Optoelectronics Progress, 2022, 59(23): 2300002
Category: Reviews
Received: Oct. 9, 2021
Accepted: Nov. 10, 2021
Published Online: Oct. 11, 2022
The Author Email: Gong Yandong (eydgong@bistu.edu.cn)