Sagi Mathai

David Horsley2
Ming-Chang M Lee2
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—A novel velocity-matched distributed balanced pho-todetector with a 50-coplanar waveguide output transmission line has been experimentally demonstrated in the InP–InGaAs material system. Distributed absorption and velocity matching are employed to achieve high-saturation photocurrent. A common mode rejection ratio of 27 dB has been achieved. The RF link(More)
Buses have historically provided a flexible communications structure in computer systems. However, signal integrity constraints of high-speed electronics have made multi-drop electrical busses infeasible. Instead, we propose an optical data bus for computer interconnections. It has two sets of optical waveguides, one as a fan-out and the other as a fan-in,(More)
—A novel balanced electroabsorption modulated pho-tonic link for simultaneous suppression of even-order distortions, third-order distortions, laser relative intensity noise (RIN), and common amplified spontaneous emission noise at the same modu-lator bias point was experimentally demonstrated for the first time. By biasing the balanced electroabsorption(More)
We present an electrothermally actuated, rotating microlens array for the application of aligning free-space optical interconnects. A bistable mechanical brake holds the rotating stage after alignment so it does not consume any power in steady state. A 4×4 double-sided microlens array is fabricated via micro-inkjet printing and is precisely mounted on the(More)
We present a free-space optical interconnect system capable of dynamic closed-loop optical alignment using a microlens scanner with a proportional integral and derivative controller. Electrostatic microlens scanners based on combdrive actuators are designed and characterized with vertical cavity surface emitting lasers (VCSELs) for adap-tive optical beam(More)
A monolithic 4u4 wavelength-selective cross-connect (chip area = 3.2u4.6 cm 2) is realized by integrating four 4u1 MEMS wavelength-selective switches and four 1u4 passive splitters, together with a 4u4 waveguide shuffle network on a silicon-on-insulator. Wavelength-selective routing has been successfully demonstrated.
Phone:+l-ll0-8257338. Fax+l-310-7945513. Abstract: A novel dynamic dispersion compensator has been realized using MEMS microdisks with variable power-coupling ratio. The coupling is controlled by varying waveguide-disk spacing. A gmup velociw dispersion tuning range of 4OOps/mn has been achieved experimentally.' Introduction Dynamic dispersion compensation(More)
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