Coupled mode analysis for graded index multi-waveguide systems

Krishna Chandra Patra; Sangeeta Srivastava; Enakshi Khular Sharma

doi:10.1117/12.2005691

11 March 2013 Coupled mode analysis for graded index multi-waveguide systems

Krishna Chandra Patra, Sangeeta Srivastava, Enakshi Khular Sharma

Proceedings Volume 8621, Optical Components and Materials X; 86211Q (2013) https://doi.org/10.1117/12.2005691
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

We present the modified scalar coupled mode analysis for an array of N diffused channel waveguides. The study simulates the lateral evanescent field coupling in the Graded Index Multi-Waveguide System. In a two-step procedure, the propagation characteristics of individual waveguides are obtained first by the completely analytical, closed form expressions obtained from the variational method. Consequent upon obtaining the individual waveguide characteristics, the complete scalar coupled mode theory has been developed that includes the non-orthogonality of the individual waveguide modes for strongly coupled waveguides. The coupled mode equations are solved to obtain the supermodes corresponding to the coupled waveguides configuration. Further to this, power exchange in the graded index Multi- Waveguide systems has been studied. Complete power transfer between the outside guides of the symmetric three waveguide graded index coupler is reported when the condition of equispaced effective indices is met.

Citation Download Citation

Krishna Chandra Patra, Sangeeta Srivastava, and Enakshi Khular Sharma "Coupled mode analysis for graded index multi-waveguide systems", Proc. SPIE 8621, Optical Components and Materials X, 86211Q (11 March 2013); https://doi.org/10.1117/12.2005691

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