1.
Liquid crystal based active wavelength filter for phase-sensitive optical time domain reflectometry.
Opt Express
; 30(26): 47017-47025, 2022 Dec 19.
Artigo
em Inglês
| MEDLINE
| ID: mdl-36558639
RESUMO
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 2.21â dB compared with passive filters. Additionally, the proposed system can effectively eliminate ASE noise, resulting in an SNR of 12.99â dB.