Modal cutoffs in symmetric buried channel waveguide (BCW) couplers

James A. Besley; John D. Love; Francois J. Ladouceur; Graeme D. Maxwell

doi:10.1117/12.316721

7 July 1998 Modal cutoffs in symmetric buried channel waveguide (BCW) couplers

James A. Besley, John D. Love, Francois J. Ladouceur, Graeme D. Maxwell

Proceedings Volume 3283, Physics and Simulation of Optoelectronic Devices VI; (1998) https://doi.org/10.1117/12.316721
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

The cutoff wavelengths of the higher-order supermodes of symmetric square-core and rectangular-core step-profile couplers are determined in order to interpret the spectral response of a practical single-mode buried-channel waveguide coupler. Our results suggest the possibility of simple diagnostic tests for such devices and highlight the design constraints imposed by second order supermodes. We also compare the behavior of these couplers with that of circular-core couplers to illustrate how the geometry of each core affects the coupler cutoff characteristics.

Citation Download Citation

James A. Besley, John D. Love, Francois J. Ladouceur, and Graeme D. Maxwell "Modal cutoffs in symmetric buried channel waveguide (BCW) couplers", Proc. SPIE 3283, Physics and Simulation of Optoelectronic Devices VI, (7 July 1998); https://doi.org/10.1117/12.316721

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