Analysis of π -phase-shifted fiber bragg gratings for ultrasonic detection

Tongqing Liu, Ming Han

Research output: Contribution to journalArticlepeer-review

112 Scopus citations


Using numerical simulations, we investigated the responses of the π-phase-shifted fiber Bragg gratings (πFBGs) impinged by pressure ultrasonic waves. The effect of the grating length, grating refractive index modification depth, and ultrasonic frequency on the wavelength sensitivity and intensity sensitivity of the πFBG ultrasonic sensor for ultrasonic waves of different wavelengths was analyzed. The directivity of a πFBG sensor was also studied. Our analysis revealed several unique πFBG response characteristics and will be useful in the design and optimization of fiber-optic ultrasonic sensors that use a πFBG as the sensing element.

Original languageEnglish (US)
Article number6165325
Pages (from-to)2368-2373
Number of pages6
JournalIEEE Sensors Journal
Issue number7
StatePublished - 2012


  • Fiber Bragg grating (FBG)
  • fiber-optic sensors
  • pressure wave
  • ultrasonic detection

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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