Coupling characteristics of high birefringence dual-core As2S3 rectangular lattice photonic crystal fiber

doi:10.1088/1674-1056/21/3/034217

Abstract A type of As₂S₃ chalcogenide glass mid-infrared dual-core photonic crystal fiber has been proposed. The dual-core photonic crystal fiber (PCF) consists of two asymmetric cores. The high polarization property and the coupling characteristics have been studied by using the finite element method and mode coupling theory. Numerical results show that the birefringence at wavelength $\lambda$ = 10 μm is up to 0.01386 and the coupling length can reach wavelength $\lambda$ = 5 μm, 261 μm and 271.44 μm for x-polarized mode and y-polarized mode, respectively. It demonstrates that a 6.786-mm-long fiber can exhibit an extinction ratio of better than -10 dB and a bandwidth of 180 nm.

Keywords: photonic crystal fiber birefringence coupling length mid-infrared

Received: 17 April 2011
Revised: 21 August 2011
Accepted manuscript online:

PACS:	42.81.-i	(Fiber optics)
	42.81.Gs	(Birefringence, polarization)
	42.82.Et	(Waveguides, couplers, and arrays)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10874145), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20091333110010), the Natural Science Foundation of Hebei Province, China (Grant No. F2009000481), and the China Postdoctoral Science Foundation (Grant Nos. 20080440014 and 200902046).

Corresponding Authors: Li Shu-Guang,shuguangli@ysu.edu.cn
E-mail: shuguangli@ysu.edu.cn

Cite this article:

Liu Shuo(刘硕), Li Shu-Guang(李曙光), Yin Guo-Bing(尹国冰), and Wang Xiao-Yan(王晓琰) Coupling characteristics of high birefringence dual-core As₂S₃ rectangular lattice photonic crystal fiber 2012 Chin. Phys. B 21 034217

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Coupling characteristics of high birefringence dual-core As2S3 rectangular lattice photonic crystal fiber

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Coupling characteristics of high birefringence dual-core As₂S₃ rectangular lattice photonic crystal fiber