Ultra-compact multimode interference InGaAsP multiple quantum well modulator

    Authors

    D. May-Arrioja; P. Likamwa; R. Selvas-Aguilar;J. Sanchez-Mondragon

    Comments

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    Abbreviated Journal Title

    Opt. Quantum Electron.

    Keywords

    integrated optics; modulator; multimode interference; multiple quantum; wells; semiconductors; SWITCHES; Engineering, Electrical & Electronic; Optics

    Abstract

    We propose a new structure for an ultra-compact multimode interference (MMI) InGaAsP multiple quantum well modulator. The operating principle is based on restricting the coupling of the self-image produced by the MMI region into a single mode output waveguide. The key is to excite only the even modes within the MMI region, and this is achieved by operating the MMI waveguide under the condition of restricted symmetric interference. By asymmetrically inducing a phase change of pi along a selected area within the MMI region, mode conversion of all the even modes to odd modes is achieved. Since only the fundamental mode can be coupled to the output waveguide, neither an individual mode, nor any combination of the modes will be coupled, and therefore the injected light is fully attenuated. The modulation characteristics are analyzed using the finite-difference beam propagation method. Extinction ratios as low as -37 dB are demonstrated without electro-absorption effects. For the case of low electro-absorption, which corresponds to a more realistic situation, this value is only increased to -35 dB.

    Journal Title

    Optical and Quantum Electronics

    Volume

    36

    Issue/Number

    15

    Publication Date

    1-1-2004

    Document Type

    Article

    Language

    English

    First Page

    1275

    Last Page

    1281

    WOS Identifier

    WOS:000228237400003

    ISSN

    0306-8919

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