1. A. Kozannet, J. Fleuret, H. Maitre, and M. Rousseau, Optique et Telecommunications (Eyrolles et Cnet-Enst, Paris, 1981; Mir, Moscow, 1984).
2. K. Marishita, Y. Kondoh, and N. Kumagai, IEEE Trans. Microwave Theory Tech. 28, 33 (1980).
3. C. Jeh, L. Casperson, and W. P. Brown, Appl. Phys. Lett. 34, 460 (1979).
4. A. W. Snyder and J. D. Love, Optical Waveguide Theory (Chapman and Hall, London, 1983; Radio i Svyaz’, Moscow, 1987) [in Russian].
5. G. Kogel’nik and T. Li, Proc. IEEE 54, 1312 (1966).