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Northwestern Engineering researchers have designed a quantum cascade laser (QCL) frequency comb that is dramatically more efficient than previous iterations. Led by Manijeh Razeghi, researchers i...
We demonstrate an extremely compact bend for a photonic crystal waveguide supporting three spatial modes. The bend exhibits nearly 100% transmission over a relative bandwidth of 1% with less than 1% c...
We design an extremely compact photonic crystal waveguide spatial mode converter which converts the fundamental even mode to the higher order odd mode with nearly 100% efficiency. We adapt a pre...
We present an extremely compact wavelength division multiplexer design, as well as a general framework for designing and optimizing frequency selective devices embedded in photonic crystals satisfying...
A novel method to measure refractive index of liquids by using an extrinsic-phase-shift fiber Bragg grating(EPS-FBG) is proposed and experimentally demonstrated. The EPS-FBG is obtained by separating ...
We demonstrate a compact 40-channel, dense wavelength division multiplexing (DWDM)VMUX/DEMUX by monolithic integration of an echelle grating and high-speed p-i-n VOA on the silicon-on-insulator (SOI) ...
We propose and demonstrate a compact tunable optical dispersion compensator(TODC) with 100-GHz FSR. The TODC is based on longitudinal displacement of a WGR resulting in chromatic dispersion compensati...
We developed a compact TO-CAN module with a 1.3-μm InGaAlAs directly-modulated laser. We achieved a record relaxation oscillation frequency slope value of 4.85 GHz/mA 1/2 and a 40-Gbps modulated trans...
flexible and compact hierarchical optical cross-connect (HOXC) node that considers a practical waveband add/drop restriction is proposed. We introduce a prototype HOXC system and verify its technical ...
We describe a compact transponder aggregator comprising a splitter-switch and a tunable filter array based on PLC technology. We realize a colorless, directionless and contentionless multi-degree ROAD...
We describe a novel small multi-fiber connector and its applications to high-density and low-cost interconnection for optical network systems, including an optical backplane combined with an optical f...
We present results from novel compact InGaAsP/InP based flattened micro-ring resonators and lasers. Resonators with circumferences 30-300μm by using etched beam-splitters (EBS) are demonstrated. EBS c...
A 3μm long ultra small surface plasmon polariton effect based TM to TE polarization rotator was designed. Effective polarization rotation was achieved in fabricated devices. 10dB PER and 11dB insertio...
A novel type of optical polarizer based on silicon-on-insulator shallowly-etched ridge waveguide is designed,fabricated and characterized. The present polarizer is compact, broad-band, and easy-fabric...
We present a fully reconfigurable fourth-order SOI RF-photonic filter with a tunable bandwidth of 0.9–5 GHz, FSR > 600 GHz, out-of-band rejection > 38 dB, and compact size (0.15 mm 2 ) using high-Q re...

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