Fiber-taper seeded long-period grating pair as a highly sensitive refractive-index sensor

Jin Fei Ding, Aping Zhang, Li Yang Shao, Jin Hua Yan, Sailing He

Research output: Journal article publicationJournal articleAcademic researchpeer-review

231 Citations (Scopus)


We report the fabrication and characterization of a highly sensitive refractive-index sensor based on a long-period grating (LPG) pair with a fiber-taper section in between. Two LPGs with ∼3-dB transmissivity form an in-fiber Mach-Zehnder interferometer. A fiber taper is made between the two LPGs to improve and tailor the sensitivity of the sensor. Enhanced sensitivity, which is about five times higher than that of a normal LPG pair, is achieved in the experiment.
Original languageEnglish
Pages (from-to)1247-1249
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number6
Publication statusPublished - 1 Jun 2005
Externally publishedYes


  • Fiber taper
  • Long-period fiber gratings
  • Optical fiber sensor
  • Refractive-index (RI) measurement

ASJC Scopus subject areas

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

Cite this