Torsion sensing characteristics of a highly birefringent photonic crystal fiber with two asymmetric cores in the Sagnac loop

Khurram Naeem; Bok Hyeon Kim; Youngjoo Chung

doi:10.1117/12.2194678

28 September 2015 Torsion sensing characteristics of a highly birefringent photonic crystal fiber with two asymmetric cores in the Sagnac loop

Khurram Naeem, Bok Hyeon Kim, Youngjoo Chung

Author Affiliations +

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96347K (2015) https://doi.org/10.1117/12.2194678
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

We experimentally demonstrated torsion sensing characteristics of a highly-birefringent asymmetric two-core photonic crystal fiber (HB-ATCPCF) in the Sagnac loop configuration. Two cores in the HB-ATCPCF exhibit distinct birefringence properties and light launched into them propagate with negligible coupling. The transmission interference spectrum of the device shows six frequency peaks in the spatial domain, which corresponds to the two Sagnac and four Mach-Zehnder interference spectra characterized by the four-beam interference model. Torsion response of the device was investigated by measuring the shift of the peak wavelength and the fringe visibility of the fiber interferences using fast Fourier transform-based spectrum-demodulation method.

Citation Download Citation

Khurram Naeem, Bok Hyeon Kim, and Youngjoo Chung "Torsion sensing characteristics of a highly birefringent photonic crystal fiber with two asymmetric cores in the Sagnac loop", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96347K (28 September 2015); https://doi.org/10.1117/12.2194678

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