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Mode interplay via quadratic cascading in a lithium niobate waveguide for all-optical processing

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Abstract

The effects of the nonlinear interplay between modes of a lithium niobate channel waveguide are numerically investigated. Based on the nonlinear phase-shift obtainable via up- and down-conversion of each mode at the input frequency into and from the second-harmonic modes generated through Type I and Type II interactions, the waveguide can operate as an all-optical transistor with large small-signal-gain, and as a mode-mixing device capable of spatial switching and routing. It exhibits good switching contrast at 1.55 μm with low driving powers.

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Authors and Affiliations

  1. Department of Electronic Engineering, Terza University of Rome, Via della Vasca Navale 84, 00146, Rome, Italy

    A. De Rossi

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  1. A. De Rossi
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  2. C. Conti
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  3. G. Assanto
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Rossi, A.D., Conti, C. & Assanto, G. Mode interplay via quadratic cascading in a lithium niobate waveguide for all-optical processing. Optical and Quantum Electronics 29, 53–63 (1997). https://doi.org/10.1023/A:1018525332201

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