An arrayed waveguide grating based multiplexer and interrogator for Fabry-Perot sensors

A.J. Willshire, P. Niewczas, J.R. McDonald

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this paper, we propose an interrogation system capable of multiplexing four identical Fabry-Perot (FP) interferometric sensors using two wavelength-division multiplexing devices. One is a 40-channel DWDM channel monitor, the other a four-channel CWDM device. The sensors are connected to the output channels of the CWDM device in order to assign a portion of the spectrum to each sensor. The reflected spectra are then analyzed using the DWDM channel monitor. By monitoring the power incident on each of the DWDM channels, the four sensor reflection spectra can be reconstructed in software and information relating to the measurand obtained. Based on software simulations and previous laboratory experiments with single sensors, it is predicted that this system would be capable of interrogating four EFPI strain sensors simultaneously at frequencies greater than 5 kHz with a resolution of approximately 2 /spl mu//spl epsiv/ and a range of 3000 /spl mu//spl epsiv/.
Original languageEnglish
Pages (from-to)964-969
Number of pages5
JournalIEEE Sensors Journal
Volume5
Issue number5
DOIs
Publication statusPublished - 2005

Keywords

  • Fabry-Perot interferometers
  • arrayed waveguide gratings distributed sensors
  • multiplexing
  • optical sensors
  • electrical systems

Fingerprint Dive into the research topics of 'An arrayed waveguide grating based multiplexer and interrogator for Fabry-Perot sensors'. Together they form a unique fingerprint.

  • Cite this