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Asymmetric first-order Bragg interactions in an active dielectric waveguide

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Abstract

The asymmetric first-order Bragg interactions in an active planar dielectric waveguide are investigated for the case of even TE modes. Either the index or the gain is assumed to have a sinusoidal variation in the propagation direction. By a singular perturbation procedure using multiple space scales, the coupled-mode equations governing the nature of the Bragg interactions are systematically deduced and the characteristics of this instability are examined. For the gain-modulated waveguide having an average loss, there are two threshold values for the modulation index of the gain, one for absolute instability and the other for traveling wave amplification, and these threshold values are deduced. Representative numerical results are presented to illustrate the characteristics of the Bragg interactions.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, The University of Wisconsin, 53706, Madison, WI, USA

    S. R. Seshadri

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  1. S. R. Seshadri
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Seshadri, S.R. Asymmetric first-order Bragg interactions in an active dielectric waveguide. Appl. Phys. 17, 141–149 (1978). https://doi.org/10.1007/BF00885246

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  • DOI: https://doi.org/10.1007/BF00885246

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