Abrupt taper Michelson interferometer using heterodyne for measuring refractive index

Yu Chan Liang, Chia Chi Liao, Yu Lung Lo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A method is proposed for measuring the refractive index (RI) of aqueous solutions using an abrupt taper Michelson interferometer and a synthetic heterodyne detection scheme. In the proposed approach, the abrupt taper Michelson interferometer is implemented with a Fabry-Perot cavity in a path-matching differential interferometer. The RI of the aqueous solution is then extracted from the phase shift of the heterodyne demodulated interferometric signal. The experimental results show that a change in the RI of 0.0001 prompts a phase shift of ~1.35° in the demodulated signal given the use of an abrupt taper Michelson interferometer with a sensing length of 20 cm.

Original languageEnglish
Article number6892998
Pages (from-to)2330-2333
Number of pages4
JournalIEEE Photonics Technology Letters
Volume26
Issue number23
DOIs
Publication statusPublished - 2014 Dec 1

All Science Journal Classification (ASJC) codes

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

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