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Proceedings Paper

Design Considerations For Mode Extinction Modulators In LiNb0[sub]3[/sub] Waveguides
Author(s): Paul R. Ashley; William S. C. Chang
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Paper Abstract

Many types of electro-optic modulators have been considered for IOC applications. The mode extinction modulator is particularly interesting in that its operation is based on the composition of several physical mechanisms. These include coupling between guided modes, radiation to substrate modes, and voltage dependent propagation losses. Therefore, in addition to possessing the desired properties of high frequency response, low operating voltage, high efficiency, large packing density, and simplicity in fabrication, the modulator's transfer curve can be altered to optimize a particular curve shape. This is accomplished by adjusting certain physical parameters in the waveguide structure or modulator electrodes. For example, a large linear dynamic range can be achieved by the proper choice of physical parameters. Optimization for high efficiency, linearity, and modulation depth will be reported along with design parameters and trade-offs. In addition, a technique for creating an optical bias will be discussed which allows operating point selection.

Paper Details

Date Published: 11 September 1985
PDF: 7 pages
Proc. SPIE 0578, Integrated Optical Circuit Engineering II, (11 September 1985); doi: 10.1117/12.950750
Show Author Affiliations
Paul R. Ashley, U.S. Army Missile Command (United States)
William S. C. Chang, University of California (United States)


Published in SPIE Proceedings Vol. 0578:
Integrated Optical Circuit Engineering II
Sriram Sriram, Editor(s)

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