Affiliation:
1. K-water Research Institute
Abstract
This study proposes a liquid-crystal-based active wavelength filter for phase-sensitive optical time domain reflectometry to mitigate the amplified spontaneous emission (ASE) noise and accurately match the passband with the light source. The validity of the proposed system was verified using comparative experiments with conventional passive optical filters. The experiment showed an increase in signal-to-noise ratio (SNR) of up to 2.21 dB compared with passive filters. Additionally, the proposed system can effectively eliminate ASE noise, resulting in an SNR of 12.99 dB.
Funder
Korea Institute of Energy Technology Evaluation and Planning
Ministry of Trade, Industry and Energy
Korea Water Resources Corporation
Subject
Atomic and Molecular Physics, and Optics