M. J. Robertson, S. Ritchie-and-p, and . Dayan, Semiconductor waveguides : analysis of optical propagation in single rib structures and directional couplers, IEE PROCEEDINGS, vol.132, issue.6, 1985.

D. Marcuse, Theory of dielectric optical waveguides, 1974.

A. S. Bamberger-and-a and . Bonnet, Mathematical analysis of the guided modes of an optical fiber, SIAM J. MATH. ANAL, vol.21, issue.6, pp.1487-1510, 1990.

M. Lenoir-and-a and . Tounsi, The localised finite element method and its applications to the twodimensional sea-keeping problem, SIAM J. NUMER. ANAL, vol.25, issue.4, pp.729-752, 1988.