中国物理B ›› 2012, Vol. 21 ›› Issue (3): 34217-034217.doi: 10.1088/1674-1056/21/3/034217

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刘硕,李曙光,尹国冰,王晓琰   

  • 收稿日期:2011-04-17 修回日期:2011-08-21 出版日期:2012-02-15 发布日期:2012-02-15
  • 通讯作者: 李曙光,shuguangli@ysu.edu.cn E-mail:shuguangli@ysu.edu.cn

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

Liu Shuo(刘硕), Li Shu-Guang(李曙光), Yin Guo-Bing(尹国冰), and Wang Xiao-Yan(王晓琰)   

  1. Key Laboratory of Metastable Materials Science and Technology, College of Science, Yanshan University, Qinhuangdao 066004, China
  • Received:2011-04-17 Revised:2011-08-21 Online:2012-02-15 Published:2012-02-15
  • Contact: Li Shu-Guang,shuguangli@ysu.edu.cn E-mail:shuguangli@ysu.edu.cn
  • Supported by:
    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).

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.

Key words: photonic crystal fiber, birefringence, coupling length, mid-infrared

中图分类号:  (Fiber optics)

  • 42.81.-i
42.81.Gs (Birefringence, polarization) 42.82.Et (Waveguides, couplers, and arrays)