Open AccessTwin core photonic crystal fiber for in-line Mach-Zehnder interferometric sensing applications
Author(s) -
Bongkyun Kim,
Tae-Hoon Kim,
Long Cui,
Youngjoo Chung
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.015502
Subject(s) - optics , photonic crystal fiber , materials science , mach–zehnder interferometer , interferometry , cladding (metalworking) , birefringence , astronomical interferometer , optical fiber , optoelectronics , physics , metallurgy
We will discuss fabrication of twin core photonic crystal fiber (TC-PCF) using the stack-and-draw method and its application for in-line Mach-Zehnder interferometers. The small difference in the effective indexes of the two core modes leads to interference fringes and the birefringence of the twin cores results in polarization-dependent fringe spacing. The strain sensitivity was negative and wavelength-dependent. A novel intensity-based bend sensor is also demonstrated with bend-induced spatial fringe shift. High air filling fraction of fabricated TC-PCF cladding provides immunity to bend-induced intensity fluctuation.