Lossless non-interferometric electro-optic III-V index-guided- wave switches and switching arrays

摘要

Lossless guided-wave switches with more than 30 dB of crosstalk- isolation are comprised of branched channel waveguides with laser-like cross-sections. Optical gain, sufficient to overcome power- splitting losses, is provided by carrier-injection currents. Due to its low-noise properties, the single-quantum-well structure is found to be optimum for cascading switches into a multi-stage network. A lossless 1×N network with 1024 switched outputs should be feasible.