Reflection, transmission, and scattering at an integrated diode laser-waveguide interface

Gary L. Peterson

doi:10.1117/12.18282

1 May 1990 Reflection, transmission, and scattering at an integrated diode laser-waveguide interface

Gary L. Peterson

Proceedings Volume 1219, Laser Diode Technology and Applications II; (1990) https://doi.org/10.1117/12.18282
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

A first-principle method for calculating reflection, transmission, and scattering of light at a boundary between a diode laser and an adjoining waveguide is presented. The electric field on each side of the boundary is expanded in terms of the trapped modes and radiation modes of the laser and waveguide. A matrix equation for the coefficients of each mode is then obtained by matching the fields and their longitudinal derivatives at the boundary. This equation is solved numerically to obtain a reflection and scattering matrix for the fraction of the incident light reflected into each trapped mode of the diode laser, scattered into radiation modes, and transmitted into an adjoining waveguide. Results obtained from this method are compared with calculations using the effective index of refraction technique and an overlap integral analysis to determine when these simpler approaches are valid.

Citation Download Citation

Gary L. Peterson "Reflection, transmission, and scattering at an integrated diode laser-waveguide interface", Proc. SPIE 1219, Laser Diode Technology and Applications II, (1 May 1990); https://doi.org/10.1117/12.18282

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