[1] H. Kogelnik, Τ. Li; Proc. IEEE, 1966, 54,1312.

[2] A. Maitland, Μ. H. Dunn; Laser Physics, North-Holland, Amsterdam 1969, pl40, 156.

[3] Jahnke-Emde-Lòsch;Tables of Higher Functions, McGraw-Hill, New York, 1960, p101～104.

[5] Е. N. Bracewell; The Fourier Transform and its Applications, McGraw-Hill, New York, 1978, p160.

[6] W. Kleen, R. Muller; Laser, Springer-Verlag, Berlin 1969, p60～63.