C. Gomez-reino et al., Diffraction-free and diffraction-limited propagation of light in graded-index planar waveguides with hyperbolic secant refractive index profile, J MOD OPT, 47(1), 2000, pp. 91-102
A study of diffraction-free and diffraction-limited propagation of light wi
th transverse amplitude in sech through a planar waveguide with hyperbolic
secant refractive index profile is presented. Analytical solutions by the s
tationary phase method are obtained. A particular case is analysed.