Open AccessIn-fiber Mach-Zehnder interferometer for gas refractive index measurements based on a hollow-core photonic crystal fiber
Author(s) -
Nicholas L. Andrews,
R. Brendan Ross,
Dorit Munzke,
Camiel van Hoorn,
Andrew Brzezinski,
Jack A. Barnes,
Oliver Reich,
HansPeter Loock
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.014086
Subject(s) - photonic crystal fiber , optics , interferometry , materials science , refractive index , mach–zehnder interferometer , graded index fiber , core (optical fiber) , optical fiber , fiber , single mode optical fiber , fiber optic sensor , optoelectronics , physics , composite material
We describe an in-fiber interferometer based on a gas-filled hollow-core photonic crystal fiber. Expressions for the sensitivity, figure of merit and refractive index resolution are derived, and values are experimentally measured and theoretically validated using mode field calculations. The refractive indices of nine monoatomic and molecular gases are measured with a resolution of δn s < 10 -6 .