Study of cross-talk of parallel Fabry-Perot sensors in the coherence multiplexing

Yu-Lung Lo

doi:10.1117/12.2302032

1 September 1999 Study of cross-talk of parallel Fabry-Perot sensors in the coherence multiplexing

Yu-Lung Lo

Proceedings Volume 3746, 13th International Conference on Optical Fiber Sensors; 374616 (1999) https://doi.org/10.1117/12.2302032
Event: 13th International Conference on Optical Fiber Sensors, 1999, Kyongju, Korea, Republic of

Abstract

Cross-talks in parallel Fabry-Perot sensors for demodulation in a path-matching differential interferometry (PMDI) can be limited by corresponding path-matching read-out systems. However, improper design in cavity lengths of Fabry-Perots can cause a serious cross-talk. In this paper, using a spectrum analysis to design the parallel Fabry-Perot sensors without cross-talk is presented. It is concluded that the length difference in each two Fabry-Perot cavities needs to be longer than the coherence length in a broadband light source. Experimental data shows that the cross-talk between two parallel Fabry-Perot sensors in PMDI is in a good agreement with the analytical predication.

Citation Download Citation

Yu-Lung Lo "Study of cross-talk of parallel Fabry-Perot sensors in the coherence multiplexing", Proc. SPIE 3746, 13th International Conference on Optical Fiber Sensors, 374616 (1 September 1999); https://doi.org/10.1117/12.2302032

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