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

Yu Lung Lo, Chun Han Wang

Research output: Contribution to journalConference article

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 (PMDI). This paper presents 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.

Original languageEnglish
Pages (from-to)552-556
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3897
Publication statusPublished - 1999 Dec 1
EventProceedings of the 1999 Advanced Photonic Sensors and Applications - Singapore, Singapore
Duration: 1999 Nov 301999 Dec 3

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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