High-sensitivity multipoint refractive index measurement system composed of multimode interference sensors and arrayed waveguide wavelength filters

Hideki Fukano, Takahito Mukai

Research output: Contribution to journalArticlepeer-review

Abstract

A multipoint sensing measurement system with high sensitivity was developed by combining multimode interference (MMI) sensors and a wavelength selection configuration. MMI optical fibers and an arrayed waveguide (AWG) wavelength filter work as refractive index sensors and wavelength selector, respectively. They were operated with a fine calibration technique using dual AWG wavelength filters and defined wavelength light from a tunable laser source. By employing narrow-core single-mode fibers for the input and output ports of the MMI, the optical fiber improved the average sensitivity up to 820 dB/RIU under multipoint sensing conditions.

Original languageEnglish
Article numberSK1004
JournalJapanese journal of applied physics
Volume61
Issue numberSK
DOIs
Publication statusPublished - Aug 1 2022

Keywords

  • fiber sensor
  • multimode interference
  • multipoint
  • multipoint measurement system
  • refractive index measurement

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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