Optical refractive-index sensor based on dual fiber-Bragg gratings interposed with a multimode-fiber taper

Li Yang Shao, Aping Zhang, Wei Sheng Liu, Hong Yan Fu, Sailing He

Research output: Journal article publicationJournal articleAcademic researchpeer-review

62 Citations (Scopus)


A new type of optical refractive-index (RI) sensor is proposed and experimentally demonstrated by using a structure of two single-mode fiber (SMF) Bragg gratings with a multimode fiber (MMF) taper in-between. The loss induced by a mismatch of waveguide structure between SMFs and MMFs is amplified by a tapering process, and is utilized for RI sensing through evanescent field. Experimental results show that the sensor possesses a tailorable sensitivity to the change of external RI and has a good linear response in the simultaneous measurement of external RI and temperature.
Original languageEnglish
Pages (from-to)30-32
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number1
Publication statusPublished - 1 Jan 2007
Externally publishedYes


  • Fiber Bragg grating (FBG)
  • Fiber-optic sensor
  • Multimode fiber taper (MFT)
  • Refractive-index (RI) measurement

ASJC Scopus subject areas

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

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