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Journal Article
Liquid crystal based active wavelength filter for phase-sensitive optical time domain reflectometry
- Authors
- Dae-Gil Kim, Aram Lee, Siwoong Park, Chan Il Yeo, Hark Yoo, Cheolho Bae, Hyoung Jun Park
- Issue Date
- 2022-12
- Citation
- Optics Express, v.30, no.26, pp.47017-47025
- ISSN
- 1094-4087
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- 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.
- KSP Keywords
- Amplified spontaneous emission (ASE) noise, Light source, Liquid crystals(LCs), 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)
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
