Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21391
Title: Fabrication, characterization, and sensing applications of a high-birefringence suspended-core fiber
Authors: Liu, Z
Wu, C
Tse, MLV
Tam, HY 
Keywords: Birefringence
Microstructured optical fiber
Optical fiber sensors
Sagnac interferometer
Suspended-core fiber (SCF)
Issue Date: 2014
Publisher: Institute of Electrical and Electronics Engineers
Source: Journal of lightwave technology, 2014, v. 32, no. 11, 6807654, p. 2113-2122 How to cite?
Journal: Journal of lightwave technology 
Abstract: In this paper, we report on the fabrication, characterization, and sensing applications of a high-birefringence suspended-core fiber (HB-SCF) using the stack-and-draw technique. Capillaries in two sizes were used for stacking, forming an elliptical core, giving rise to geometric modal birefringence of the HB-SCF. Through a finite-element method, the theoretical values of the phase and group modal birefringence of the HB-SCF were found to be 2.59 \times 10 -4 and 4.75 \times 10-4, respectively. Based on a Sagnac interferometer (SI), the group modal birefringence of the HB-SCF was measured to be 4.84 \times 10-4 , which agrees well with the theoretical result. The sensing characteristics of the HB-SCF SI for pressure, strain, and torsion measurements were analyzed theoretically and investigated experimentally. It exhibits sensitivities of 2.82 nm/MPa for hydrostatic pressure, 0.43 pm/με for strain, and 0.0157/° for torsion measurements. The HB-SCF is made entirely of pure silica without stress-applying parts, thus its modal birefringence is thermally insensitive, resulting in a low temperature sensitivity of ∼1 pm/°C.
URI: http://hdl.handle.net/10397/21391
ISSN: 0733-8724
EISSN: 1558-2213
DOI: 10.1109/JLT.2014.2319818
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