Title :
Temperature-Insensitive Torsion Sensor With Enhanced Sensitivity by Use of a Highly Birefringent Photonic Crystal Fiber
Author :
Kim, Hyun-Min ; Kim, Tae-Hun ; Kim, Bongkyun ; Chung, Youngjoo
Author_Institution :
Gwangju Inst. of Sci. & Technol. (GIST), Gwangju, South Korea
Abstract :
We report on enhanced torsion sensitivity by using a highly birefringent photonic crystal fiber (HB-PCF)-based Sagnac interferometer. In order to increase the torsion sensitivity, we introduced an anisotropic microstructure into the cross section of an HB-PCF by enlarging the size of air holes of one row. This can result in a high birefringence of the order of 10-3 and low sensitivities to bending and temperature. The torsion sensitivity was measured to be high with ~0.06 nm/°.
Keywords :
Sagnac interferometers; birefringence; fibre optic sensors; holey fibres; mechanical variables measurement; photonic crystals; torsion; HB-PCF; Sagnac interferometer; anisotropic microstructure; highly birefringent photonic crystal fiber; temperature-insensitive torsion sensor; torsion sensitivity; Optical fiber polarization; Optical fiber sensors; Sensitivity; Silicon; Temperature measurement; Temperature sensors; Highly birefringent photonic crystal fiber (HB-PCF); Sagnac interferometer (SI); torsion sensor with enhanced sensitivity;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2068043
