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Temperature-Insensitive Torsion Sensor With Enhanced Sensitivity by Use of a Highly Birefringent Photonic Crystal Fiber

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4 Author(s)
Kim, Hyun-Min ; Gwangju Inst. of Sci. & Technol. (GIST), Gwangju, South Korea ; Kim, Tae-Hun ; Bongkyun Kim ; Youngjoo Chung

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/°.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 20 )