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Proceedings Paper

Optically differential phase detection using cross-talk mode of series Fabry-Perot sensors in PMDI
Author(s): Yu-Lung Lo; ChunHan Wang Wang
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Paper 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.

Paper Details

Date Published: 11 November 1999
PDF: 5 pages
Proc. SPIE 3897, Advanced Photonic Sensors and Applications, (11 November 1999); doi: 10.1117/12.369353
Show Author Affiliations
Yu-Lung Lo, National Cheng Kung Univ. (Taiwan)
ChunHan Wang Wang, National Cheng Kung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 3897:
Advanced Photonic Sensors and Applications
Robert A. Lieberman; Anand Krishna Asundi; Hiroshi Asanuma, Editor(s)

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