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We demonstrate a waveguide-based polarization controller that monolithically incorporates an active InGaAlAs/ InAlAs multiple-quantum-well phase shifter and a passive half-ridge polarization converter on InP. The butt-joint active/passive integration technique and self-aligned waveguide fabrication steps are employed. Using the fabricated device, efficient rotation of the Stokes vector over $\pi$ ...
Monolithically integrated InP 1×16 switch with broadband and low-noise operation is developed by using optical phased-array scheme. Potential applications to 160-Gbps packet switching and large-capacity variable optical buffering are demonstrated successfully.
Novel type of wavelength-insensitive monolithically integrated InP 1??N switch is developed using optical phased-array architecture. Low-polarization-dependent 1??8 switch, 1??16 switch, and application to 320-Gbps WDM optical packet switching are demonstrated.
Using newly developed PLZT-based OBS core node, low-loss Ether-frame transmission with application-layer connectivity is demonstrated over 92-km 2-hop field testbed. Recent progresses in developing OPS/OCS hybrid router are also reviewed.
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