[1] [1] T.A.Birks,J.C.Knight,P.St.J.Russel et al..Endlessly single-mode photonic crystal fiber[J].Opt.Lett.,1997,22(13):961-963

[2] [2] J.C.Knight .T.A.Birks,P.St .J.Russell et al..All-silica single-mode optical fiber with photonic crystal cladding [J] .Opt.Lett.,1996,21(19):1547-1549

[3] [3] J.C.Knight .Photonic crystal fibres [J ] .Nature,2003,424(6950):847-851

[4] [4] R.F.Cregan,B.J.Mangan,J.C.Knight et al..Single-mode photonic bandgap guidance of light in air[J].Science,1999,285(5433):1537-1539

[5] [5] S.Kazunori,K.Hirokazu,K.Satoki et al..Optical properties of a low-loss polarization-maintaining photonic crystal fiber [J].Opt.Express,2001,9(13):676-680

[6] [6] Guo Tieying,Lou Shuqin,Li Honglei et al..Low loss arc fusion splice of photonic crystal fibers[J].Acta Optica Sinica,2009,29(2):511-516

[7] [7] Cheng Tonglei,Li Shuguang,Zhou Guiyao et al..Relation between power fraction in the core of hollow-core photonic crystal fibers and their bandgap property fiber[J].Chinese J .Lasers,2007,34(2):249-254

[8] [8] Liu Renqiang,Liu Pinkuang,Fu Zhuang et al..Operation principle of a bend enhanced curvature optical fiber sensor[J].Acta Optica Sinica,2007,27(5):807-812

[9] [9] M.D.Nielsen,N.A.Mortensen,M.Albertsen et al..Predicting macrobending loss for large-mode area photonic crystal fibers[J].Opt.Express,2004,12(8):1775-1779

[10] [10] J.C.Baggett,T.M.Monro,K Furusawa et al..Understanding bending losses in holey optical fibers[J].Opt.Commum.,2003,227(4-6):317-335

[11] [11] T.P.Hansen,J.Broeng,C.Jakobsen et al..Air-guiding photonic bandgap fibers:spectral properties,macrobending loss,and practical handling[J].J.Lightwave Technol.,2004,22(1):11-15

[12] [12] J.Olszewski,M.Szpulak,W Urbanczyk et al..Effect of coupling between fundamental and cladding modes on bending losses in photonic crystal fiber[J].Opt.Express,2005,16(13):6015-6022

[13] [13] Guo Xiarui,Yang Dexing,Zhao Jianlin et al..Experimental investigation on the bending loss properties of photonic crystal fibers[J].Acta Photonica Sinica,2007,36(10):1817-1820

[14] [14] M.Skorobogatiy,K.Saitoh,M.Koshiba.Full-vectorial coupled mode theory for the evaluation of macro-bending loss in multimode fibers.application to the hollow-core photonic bandgap fibers[J].Opt.Express,2008,16(19):14945-14953

[15] [15] K.Saitoh,N.Mortensen,M.Koshiba.Air-core photonic band-gap fibers:the impact of surface modes[J].Opt.Express,2004,12(3):394-400

[16] [16] Cui Li,Zhao Jianlin,Zhang Xiaojuan et al..Analysis of bending loss oscillations in photonic crystal fibers[J].Acta Optica Sinica,2008,28(6):1172-1177

[17] [17] J.West,C.Smith,N.Borrelli.Surface modes in air-core photonic band-gap fibers [J].Opt.Express,2004,12(8):1485-1496