Distributed fiber-optic laser-ultrasound generation based on ghost-mode of tilted fiber Bragg gratings

Jiajun Tian, Qi Zhang, Ming Han

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

Active ultrasonic testing is widely used for medical diagnosis, material characterization and structural health monitoring. Ultrasonic transducer is a key component in active ultrasonic testing. Due to their many advantages such as small size, light weight, and immunity to electromagnetic interference, fiber-optic ultrasonic transducers are particularly attractive for permanent, embedded applications in active ultrasonic testing for structural health monitoring. However, current fiberoptic transducers only allow effective ultrasound generation at a single location of the fiber end. Here we demonstrate a fiber-optic device that can effectively generate ultrasound at multiple, selected locations along a fiber in a controllable manner based on a smart light tapping scheme that only taps out the light of a particular wavelength for laser-ultrasound generation and allow light of longer wavelengths pass by without loss. Such a scheme may also find applications in remote fiber-optic device tuning and quasidistributed biochemical fiber-optic sensing.

Original languageEnglish (US)
Pages (from-to)6109-6114
Number of pages6
JournalOptics Express
Volume21
Issue number5
DOIs
StatePublished - Mar 11 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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