Self-adaptive and highly-sensitive acoustic emission sensors based on a phase-shifted fiber bragg grating in a fiber-ring laser

Tongqing Liu, Lingling Hu, Ming Han

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose and demonstrate a novel fiber ring laser acoustic emission sensor based on π phaseshift fiber Bragg grating (πFBG) that can be self-adaptive to the static or quasi-static strain applied to the sensor. The sensing element is a 7.6 mm long πFBG with an ultra-narrow bandwidth filter (>4 pm) placed in the loop of a fiber-ring laser. A regular fiber Bragg grating (FBG) with the same center wavelength is bonded parallel and adjacent to the πFBG on an aluminum plate to ensure the lasing at the center wavelength of the πFBG. Acoustic emission signals simulated by ultrasonic pulses generated from a piezoelectric transducer whose frequency is centered at 200 kHz are directly detected by monitoring the laser intensity variations using a photodetector.

Original languageEnglish (US)
Title of host publicationSAMPE Tech 2013 Conference and Exhibition
PublisherSoc. for the Advancement of Material and Process Engineering
ISBN (Print)9781934551158
StatePublished - 2013
EventSAMPE Tech 2013 Conference and Exhibition - Wichita, KS, United States
Duration: Oct 21 2013Oct 24 2013

Publication series

NameInternational SAMPE Technical Conference

Conference

ConferenceSAMPE Tech 2013 Conference and Exhibition
CountryUnited States
CityWichita, KS
Period10/21/1310/24/13

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Self-adaptive and highly-sensitive acoustic emission sensors based on a phase-shifted fiber bragg grating in a fiber-ring laser'. Together they form a unique fingerprint.

Cite this