1Birks T A,Knight I C,Russell P.St. J,et al.Endless single-mode photonic crystal fiber[J]. Opt. Lett, 1997,22(13) : 961 -963.
2J. C. Knight, T. A. Birks, P. S. J. Russell, and D.M. Atkin, All-silica single-mode optical fiber with photonic crystal cladding[J]. 1996,21(19): 1547 - 1549.