Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 40, Issue 3, Pages 837-843Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2021.3123725
Keywords
Optical interferometry; Optical fibers; Laser tuning; Fiber nonlinear optics; Optical reflection; Optical fiber sensors; Optical sensors; Nonlinear tuning; optical frequency domain reflectometry; tunable laser source
Funding
- National Natural Science Foundation of China [61975022]
- Fundamental Research Funds for the Central Universities [2019CDQYGD038]
- National Science Fund for Distinguished Young Scholars [61825501]
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This paper proposes a simplified optical frequency domain reflectometry system by integrating an in-fiber auxiliary interferometer to compensate for laser nonlinear tuning effect. The feasibility of the proposed system in compensating the laser nonlinear tuning effect and distributed sensing capability was experimentally verified.
The traditional optical frequency domain reflectometry usually requires a separate auxiliary interferometer to compensate for laser nonlinear tuning effect. In order to break through this limitation, this paper proposes a simplified optical frequency domain reflectometry system by integrating an in-fiber auxiliary interferometer before the sensing fiber. We experimentally characterized the laser nonlinear tuning effect, and then verified the feasibility of the proposed system in compensating the laser nonlinear tuning effect by both simulation and experiment. Finally, the capabilities of the distributed sensing of our proposed system was confirmed by the temperature and strain sensing experiments.
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