상세정보
학술지
Liquid crystal based active wavelength filter for phase-sensitive optical time domain reflectometry
- 발행일
- 202212
- 출처
- Optics Express, v.30 no.26, pp.47017-47025
- ISSN
- 1094-4087
- 출판사
- Optical Society of America (OSA)
- 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, Optical time domain reflectometer(OTDR), Passive Filters, Phase-sensitive optical time domain reflectometry, Signal noise ratio(SNR), Signal-to-Noise, Wavelength filter, time-domain reflectometry(TDR)