Abstract
The problem of the electromagnetic wave propagation in a plane three-layer dielectric waveguide with complex values of the dielectric constant has been solved accurately. The solution of the problem, as applied to InGaAsP injection heterolasers makes it possible to explain the anomalously high temperature sensitivity of threshold current as the result of decreasing the waveguiding. It is evident that such imperfect features of the heterostructure, as the asymmetry or roughness of layers boundaries, worsen the temperature dependence of threshold current, and increase the coefficient of amplitude-phase coupling.
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