Distributed optical fiber sensing system based on a semiconductor laser with optical injection

Nian Fang; Zuyi Wu

doi:10.1117/12.3008233

24 November 2023 Distributed optical fiber sensing system based on a semiconductor laser with optical injection

Nian Fang, Zuyi Wu

Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 1293554 (2023) https://doi.org/10.1117/12.3008233
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China

Abstract

This paper proposes a distributed optical fiber sensing system based on a semiconductor laser with optical injection. Due to the reflection of the mirror at the end of sensing fiber, an external disturbance causes the simultaneous changes in phase of the light bidirectionally propagating in the fiber. The phase modulation induced by the external disturbance is converted into intensity modulation by the nonlinear effect of optical injection. Two waveform-changes induced by the same disturbance appear at the output signal. There is a time difference between the two changes, which is equal to the round trip time of the light from the disturbance position to the mirror. The disturbance location can be realized according to the time difference. The location performance of the system is studied through experiments, and the location errors at different positions on the 4.0859 km sensing fiber are less than 15 m. The experimental results indicate that the system is timely in detection on external disturbances and simple in location method.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Nian Fang and Zuyi Wu "Distributed optical fiber sensing system based on a semiconductor laser with optical injection", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 1293554 (24 November 2023); https://doi.org/10.1117/12.3008233

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