Open AccessRefractive index sensor based on an abrupt taper Michelson interferometer in a single-mode fiber
Author(s) -
Zhaobing Tian,
Scott S.-H. Yam,
HansPeter Loock
Publication year - 2008
Publication title -
optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.33.001105
Subject(s) - optics , materials science , michelson interferometer , fiber optic sensor , single mode optical fiber , optical fiber , interferometry , refractive index , graded index fiber , fiber bragg grating , mode volume , polarization maintaining optical fiber , photonic crystal fiber , optoelectronics , physics
A simple refractive index sensor based on a Michelson interferometer in a single-mode fiber is constructed and demonstrated. The sensor consists of a single symmetrically abrupt taper region in a short piece of single-mode fiber that is terminated by approximately 500 nm thick gold coating. The sensitivity of the new sensor is similar to that of a long-period-grating-type sensor, and its ease of fabrication offers a low-cost alternative to current sensing applications.
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