A comparative study of higher order Bragg waveguide gratings using coupled-mode theory and mode expansion modeling
H. Wenzel, R. Güther
Published in:
Int. Conf. on Numerical Simulation of Optoelectronic Devices (NUSOD), Berlin, Germany, Sep. 19-22, ISBN 0-7803-9149-73, pp. 63-64 (2005).
Abstract:
Lamellar diffraction gratings integrated into slab waveguides (so-called Bragg waveguide gratings) found widespread applications in distributed-feedback (DFB) and distributed Bragg-reflector (DBR) lasers, either as edge or as surface emitters. For the numerical simulation of these structures, a large variety of different models exists. In this paper, the modal reflectivity and transmittivity of Bragg waveguide gratings are calculated using models based on the CMT and the bi-directional mode expansion model. Thereby, an approximate solution for the partial waves exploiting the free-space Green's function is corrected and generalized.
Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
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