Passive interrogation of an extrinsic Fabry-Pérot interferometer using a three-wavelength method

Yi Jiang*, Caijie Tang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A three-wavelength method is developed to interrogate an extrinsic Fabry-Pérot interferometer (EFPI) for the measurement of a dynamic measurand. Three signals 120 deg out of phase are created by using three fiber Bragg gratings (FBGs A phase demodulator, which is the same as that used for demodulating a 3x3 coupler-based interferometer, is used to measure the phase change. A minimum detectable phase Of 0.43 μrad/Hz1/2 is achieved.

Original languageEnglish
Article number064401
JournalOptical Engineering
Volume48
Issue number6
DOIs
Publication statusPublished - 2009

Keywords

  • Extrinsic fabry-pérot interferometer (efpi)
  • Fiber bragg grating fbg
  • Fiber-optic sensors

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