Optically differential phase detection using cross-talk mode of series Fabry-Perot sensors in PMDI

Yu-Lung Lo; ChunHan Wang Wang

doi:10.1117/12.369353

11 November 1999 Optically differential phase detection using cross-talk mode of series Fabry-Perot sensors in PMDI

Yu-Lung Lo, ChunHan Wang Wang

Proceedings Volume 3897, Advanced Photonic Sensors and Applications; (1999) https://doi.org/10.1117/12.369353
Event: International Symposium on Photonics and Applications, 1999, Singapore, Singapore

Abstract

The signals between cascaded Fabry-Perot sensors have serious cross-talk problems due to complex phase interactions between sensors. However, cross-talk mode in cascaded Fabry-Perot sensors can be employed for demodulating optically differential-phase in a path-matching differential interferometry. This paper present a novel design in two series Fabry-Perot sensors for a differential- phase measurement analyzed by an optical spectrum analysis. The spectrum transfer function in a light source and Fabry- Perot cavities are simulated by a Gaussian distribution spectrum and a low-finesse reflectivity, respectively. It shows that two series Fabry-Perot sensors with the differential-phase measurement can be designed accurately. Experimental data shows that the novel design in measuring a differential-phase between two series Fabry-Perot sensors is achieved. This design in two series Fabry-Perot sensors for a differential-phase measurement can be applied to unbalanced system detection or noise compensations.

Citation Download Citation

Yu-Lung Lo and ChunHan Wang Wang "Optically differential phase detection using cross-talk mode of series Fabry-Perot sensors in PMDI", Proc. SPIE 3897, Advanced Photonic Sensors and Applications, (11 November 1999); https://doi.org/10.1117/12.369353

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