Abstract
The spectral transmission profile of systems of radiation-and tunnel-coupled waveguides is studied. It is determined how a smooth variation of the thickness of the buffer layer in a structure consisting of a pair of tunnel-coupled waveguides with strongly varying parameters will affect the spectral properties of the system as a whole. A simple physical treatment of the operation of a number of integrated and fiber-optic devices is given, and the prospects for using the proposed structure of two tunnel-coupled waveguides to realize a microlaser with waveguide output is demonstrated.
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