Composite structure distributed bragg reflector fiber laser for simultaneous two-parameter sensing

Allan C L Wong, W. H. Chung, Chao Lu, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

We propose and demonstrate using a single composite structure distributed Bragg reflector fiber laser (DBR-FL) for simultaneous sensing of refractive index (RI) and temperature. The FL structure consists of a pair of uniform fiber Bragg gratings (FBGs) forming the laser cavity. A variable cavity attenuator made by a blazed FBG (BFBG) is written inside the cavity, which varies the optical loss upon changes in the surrounding RI. Simultaneous sensing is realized from the fact that the output power only varies with the surrounding RI, whereas the lasing wavelength with the temperature. The sensitivity of RI measurement of the proposed FL improved by several times in comparison with the passive BFBG sensor.
Original languageEnglish
Article number5535123
Pages (from-to)1464-1466
Number of pages3
JournalIEEE Photonics Technology Letters
Volume22
Issue number19
DOIs
Publication statusPublished - 22 Sep 2010

Keywords

  • Composite structure distributed Bragg reflector fiber laser (DBR-FL)
  • fiber laser sensor
  • refractive index (RI)
  • simultaneous two-parameter sensing
  • temperature

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

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