[1] [1] SAITOH K,SATO Y,KOSHIBA M.Coupling characteristics of dual-core photonic crystal fiber couplers［J］.Optics Express,2003,11(24): 3188-3195.

[2] [2] LIMPERT J,SCHMIDT O,ROTHHARDT J,et al.Extended single-mode photonic crystal fiber lasers［J］.Optics Express,2006,14(7): 2715-2720.

[3] [3] JUAN H D J,SHUM P P,LU C,et al.Dispersion-flattened polarization-maintaining photonic crystal fiber for nonlinear applications［J］.Optics Communications,2009,282(20): 4072-4076.

[4] [4] GUAN Shou-hua,YU Qing-xu,ZHENG Jian-zhou.Study on the extreme characteristics of dispersion of photonic crystalfiber［J］.Acta Optica Sinica,2012,32(8): 0806001.

[5] [5] LIU Yong-xing,ZHANG Pei-qing,XU Yin-sheng,et al.Dispersion properties of Ge20Sb15Se65 chalcogenide glass photonic crystal fiber for mid-IR region ［J］.Acta Photonica Sinica,2012,41(5): 516.

[6] [6] LIU Xu-an,WU Gen-zhu,CHEN Da-ru,et al.Novel highly bireferingent photonic crystal fiber based on an elliptical hole fiber cladding and a fiber core of double-micro-hole units ［J］.Acta Photonica Sinica,2012,40(11): 1728-1732.

[7] [7] HE Zhong-jiao.Rectangular-hole photonic crystal fibers［J］.Acta Photonica Sinica,2011,40(4): 583-586.

[8] [8] FU Bo,LI Shu-guang,YAO Yan-yan,et al.Coupling characteristics of dual-core high birefringence photonic crystal fibers［J］.Acta Physica Sinica,2009,58(11): 7708-7715.

[9] [9] WANG Xu-de,ZHOU Zheng,LUO Ai-ping,et al.Design of twin core photonic crystal fiber coupler using WDM［J］.Laser ＆ Infrared,2011,41(8): 975-879.

[10] [10] GENG Kai-sheng,GUAN Jian-fei.Coupling characteristics of dual-core photonic crystal fiber with rectangular lattice［J］.Chinese Journal of Lasers,2013,40(3): 0305007 .

[11] [11] KUMAR V V,GEORGE A,KNIGHT J,et al.Tellurite photonic crystal fiber［J］.Optics Express,2003,11(20): 2641-2645.

[12] [12] FENG X,LOH W H,FLANAGAN J C,et al.Single-mode tellurite glass holey fiber with extremely large mode area for infrared nonlinear applications［J］.Optics Express,2008,16(18): 13651-13656.

[13] [13] LIAO M,CHAUDHARI C,QIN G,et al.Fabrication and characterization of a chalcogenide-tellurite composite microstructure fiber with high nonlinearity［J］.Optics Express,2009,17(24): 21608-21614.

[14] [14] LIU S,LI S G,YIN G B,et al.A novel polarization splitter in ZnTe tellurite glass three-core photonic crystal fiber［J］.Optics Communications,2012,285(6): 1097-1102.

[15] [15] CAO Ye,CUI Dan-ning,TONG Zheng-rong,et al.Dual-core photonic crystal fiber polarization splitter based on tellurite glass［J］.Chinese Journal of Lasers,2013,40(6): 0605007 .

[16] [16] SHUO L,SHU-GUANG L,YING D.Analysis of the characteristics of the polarization splitter based on tellurite glass dual-core photonic crystal fiber［J］.Optics & Laser Technology,2012,44(6): 1813-1817.

[17] [17] WANG Z,TARU T,BIRKS T A,et al.Coupling in dual-core photonic bandgap fibers: theory and experiment［J］.Optics Express,2007,15(8): 4795-4803.

[19] [19] ZHANG Bin,TAN Xiao-ling,XUE Rui-qiu et al.Polarization splitter based on double rectangular-core photonic crystal fibers［J］.Infrared and Laser Engineering,2012,41(3): 745-749.

[20] [20] LI Min-rong,CAO Ye,TONG Zheng-rong.Short length polarization splitter based on dual elliptical-core photonic crystal fiber［J］.Chinese Journal of Lasers,2012,39(10): 1005004.