Dispersion characteristics of diffused channel waveguides

A variational method is used to calculate dispersion curves for channel waveguides fabricated by masked diffusion. Composition profiles for the waveguides are obtained by numerical solution of the diffusion equation, assuming that the diffusant concentration in the unmasked region of the substrate surface is constant during the diffusion process. A linear dependence of refractive index change on diffusant concentration is assumed. The dependence of the number of guided modes on mask gap width and diffusion depth is determined as an aid to the design of modulators and switches for integrated optics.

[1]  J. Gillis,et al.  Numerical Solution of Ordinary and Partial Differential Equations , 1963 .

[2]  M. Matsuhara,et al.  Analysis of TEM modes in dielectric waveguides, by a variational method , 1973 .

[3]  V. Ramaswamy,et al.  Strip-loaded film waveguide , 1974 .

[4]  E. Conwell.  Modes in anisotropic optical waveguides formed by diffusion , 1974 .

[5]  A. A. Maradudin,et al.  Tables of Higher Functions , 1960 .

[6]  H Kogelnik,et al.  Scaling rules for thin-film optical waveguides. , 1974, Applied optics.

[7]  J. Goell.  A circular-harmonic computer analysis of rectangular dielectric waveguides , 1969 .

[8]  William Martin,et al.  A new waveguide switch/modulator for integrated optics , 1975 .

[9]  S. B. Dong,et al.  Arbitrarily shaped inhomogeneous optical fiber or integrated optical waveguides , 1975 .

[10]  E. A. J. Marcatili,et al.  Slab-coupled waveguides , 1974 .

[11]  E. A. J. Marcatili,et al.  Dielectric rectangular waveguide and directional coupler for integrated optics , 1969 .

[12]  E. Conwell.  Optical waveguiding in graded‐index layers , 1974 .

[13]  Esther M. Conwell,et al.  Modes in optical waveguides formed by diffusion , 1973 .

[14]  I. Kaminow,et al.  Metal‐diffused optical waveguides in LiNbO3 , 1974 .

[15]  W. Burns,et al.  Modes in diffused optical waveguides of arbitrary index profile , 1975 .

[16]  M. Werner,et al.  Electrically switched optical directional coupler: Cobra , 1975 .

[17]  P. K. Tien,et al.  Optical waveguide modes in single‐crystalline LiNbO3–LiTaO3 solid‐solution films , 1974 .

[18]  W. Martin,et al.  Refractive index profile measurements of diffused optical waveguides. , 1974, Applied optics.

[19]  Paul Shewmon,et al.  Diffusion in Solids , 2016 .

[20]  Ivan P. Kaminow,et al.  Efficient strip-waveguide modulator , 1975 .

[21]  Juichi Noda,et al.  Electro-optic light modulator with branched ridge waveguide , 1975 .