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학술지 Liquid crystal based active wavelength filter for phase-sensitive optical time domain reflectometry
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저자
김대길, 이아람, 박시웅, 여찬일, 유학, 배철호, 박형준
발행일
202212
출처
Optics Express, v.30 no.26, pp.47017-47025
ISSN
1094-4087
출판사
Optical Society of America (OSA)
DOI
https://dx.doi.org/10.1364/OE.477138
협약과제
21PK2200, DC±200kV급 전압형 MMC 개발 및 운영/실증, 유학
초록
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.
KSP 제안 키워드
Amplified spontaneous emission (ASE) noise, Light sources, Liquid crystal, Optical filters, Passive Filters, Phase-sensitive optical time domain reflectometry, Signal noise ratio(SNR), Signal-to-Noise, Wavelength filter, optical time-domain reflectometry(OTDR), time-domain reflectometry(TDR)