[2] Omar Manzardo, Hans Peter Herzig, Cornel R Marxer, et al. Optics Letters, 1999, 24(23): 1705.
[3] Erik R Deutsch, David Reyes. Proc. of SPIE, 2009, 7319: 1.
[5] Mertz L. Infrared Physica, 1967, 7: 17.
[9] Forman M L, Steel W H, Vanasse G A. J. Opt. Soc. Am., 1966, 56: 59.