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A rigorous and computationally efficient analysis of microstrip for use as an electro-optic modulator

Research output: Contribution to journalArticle

  • CJ Railton
  • JP McGeehan
Original languageEnglish
Pages (from-to)1099 - 1104
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Journal issue7
StatePublished - Jul 1989


Much interest has been shown in the literature concerning the direct modulation of an optical signal by a microwave signal using a microstriplike structure with a diffused optical waveguide. Due to the particular geometry of the modulator, the usual rigorous methods of analysis, such as the spectral-domain method (SDM), encounter problems, and less efficient methods have had to be used. It is shown that by using an asymptotic form of the Green's function in the standard SDM, an accurate, efficient, and rigorous full-wave analysis can readily be undertaken. A closed-form first-order solution to the field patterns is also derived.

Additional information

Publisher: Institute of Electrical and Electronics Engineers, Inc. (IEEE) Rose publication type: Journal article Terms of use: Copyright © 1989 IEEE. Reprinted from IEEE Transactions on Microwave Theory and Techniques. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • electro-optical effects, optical modulation

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