High-frequency ultrasonic hydrophone based on a cladding-etched DBR fiber laser

Li Yang Shao, Sien Ting Lau, Xinyong Dong, Aping Zhang, H. L W Chan, Hwa Yaw Tam, Sailing He

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)


Distributed-Bragg-reflector (DBR) fiber-laser-based ultrasonic hydrophone has been found to possess increased detectable frequency range due to the improved sensitivity in the high-frequency region when the fiber cladding thickness was reduced. A wet etching technique is utilized to reduce the fiber diameter of the DBR laser. The peak response frequency moves from 21 to 40 MHz when the fiber diameter was reduced from 125 to 68 μm.
Original languageEnglish
Pages (from-to)548-550
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number8
Publication statusPublished - 15 Apr 2008


  • Fiber Bragg grating
  • Fiber laser
  • Fiber-optic sensor
  • Ultrasonic hydrophone

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)


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