High-SNR integrated Φ-OTDR based on injection locking laser and frequency diversity
An integrated phase-sensitive optical time domain reflectometer (Φ-OTDR) based on injection locking laser and frequency diversity is reported with high signal to noise ratio (SNR). The integrated Φ-OTDR utilizes injection locking laser for frequency shift and semiconductor optical amplifier (SOA) for chopping. By employing 3-order frequency diversity, a high SNR of 57 dB and an excellent strain resolution as high as 0.835 <i>pε</i>/√Hz at a 10 m gauge length can be obtained.
Authors
- Zhaoyong Wang (ORCID: https://orcid.org/0000-0003-0235-5596)
- Kan Gao (ORCID: https://orcid.org/0000-0003-4823-1273)
- Xiangyue Li (ORCID: https://orcid.org/0009-0003-0510-8061)
- Xiuyou Han (ORCID: https://orcid.org/0000-0003-3592-8979)
- Zexi Liu (ORCID: https://orcid.org/0009-0003-8221-4829)
- Qing Ye (ORCID: https://orcid.org/0000-0001-5445-0996)
- Yifan Liu (ORCID: https://orcid.org/0000-0002-2989-6280)
- Wei Fang (ORCID: https://orcid.org/0000-0002-2889-9463)
- Chen Chen (ORCID: https://orcid.org/0009-0006-6739-7171)
- Qingshuai Su (ORCID: https://orcid.org/0000-0003-1684-4171)
- Haiwen Cai (ORCID: https://orcid.org/0000-0003-1122-1063)
- Huimin Wu (ORCID: https://orcid.org/0009-0008-6997-5259)
- Haoyang Pi
Institutions
- Chinese Academy of Sciences (CN)
- Dalian University of Technology (CN)
- Shanghai Zhangjiang Laboratory (CN)
- Shanghai Institute of Optics and Fine Mechanics (CN)
Publication Details
- Published
- 2025-05-22
- DOI
- https://doi.org/10.1117/12.3061051
- Primary Topic
- Advanced Fiber Optic Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.00