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Periodic corrugated waveguides with wave confinement in both transverse dimensions are analyzed. The description includes the cases of grating misalignment (tilt) and curvature; for a tilt angle θ, the resonant wavelengths vary as(cos θ)⁻¹. Coefficients for intramode coupling (identical contradirectional modes) and hybrid (intermode) coupling are calculated as functions of θ. Numerical results for a GaAlAs waveguide, of the type employed in distributed Bragg reflector (DBR) lasers, are included.
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Streifer et al. (1978) studied this question.
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