Liquid crystal based active wavelength filter for phase-sensitive optical time domain reflectometry

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 compara...

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Bibliographic Details
Published inOptics express Vol. 30; no. 26; pp. 47017 - 47025
Main Authors Kim, Dae-Gil, Lee, Aram, Park, Siwoong, Yeo, Chan Il, Yoo, Hark, Bae, Cheolho, Park, Hyoung Jun
Format Journal Article
LanguageEnglish
Published United States 19.12.2022
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Summary: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.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.477138