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Fully-integrated photonic microwave tracking generators are demonstrated for the first time. By sweeping the wavelength separation among two-locked DFBs and one tunable laser, a two-tone photo-generated RF signal with tunable difference in frequency can be generated. 2017 Optical Society of America
Four ring-based tunable laser structures are firstly demonstrated in the heterogeneous integrated silicon platform. Except for double-sided coupled-ring structure, the other three ones show comparable narrow-linewidth (∼200kHz) and output power (∼10mW) across entire wide-tuning ranges (∼40nm) with high side-mode suppression ratio (>40 dB).
We designed, fabricated and characterized an integrated chip-scale wavemeter based on an unbalanced Mach-Zehnder interferometer with 300 MHz free spectral range using low-loss Si3N4 platform. We also integrated an optical hybrid to provide phase information.
We address microwave signal generation utilizing the heterogeneous photonic integration platform, highlight the benefits of such approach and show preliminary results from a heterogeneously integrated photonic microwave signal generator. We address in detail narrow-linewidth tunable lasers as one of key components.
We demonstrate InP based evanescently-coupled p-i-n photodiodes heterogeneously integrated onto silicon-on-insulator substrate. Using advanced waveguide structures and fabrication processes, it simultaneously achieves 67 GHz O-E bandwidth (RC-free), broad optical window (1520–1600nm) with 0.5 A/W internal responsivity, and high saturation currents (9 mA at 70 GHz).
We review recent breakthroughs in the silicon photonic technology and components, and describe progress in silicon photonic integrated circuits. Heterogeneous silicon photonics has recently demonstrated performance that significantly outperforms native III/V components. The impact active silicon photonic integrated circuits could have on interconnects, telecommunications, sensors, and silicon electronics...
We analyzed and fabricated a novel coupler which possesses wavelength flattened response and splitting ratio tuning capability. The fabricated coupler showed a flattened response to wavelength over 50 nm bandwidth and the coupling power to the cross port can be tuned from 10% to 70%.
We review performance of widely-tunable narrow-linewidth ring based lasers on silicon substrates. We outline two mechanisms that significantly reduce the linewidth of such lasers. The key performance enablers are low loss waveguides and high-Q rings on the hybrid silicon platform.
A novel fully integrated tunable single mode hybrid silicon laser is demonstrated. We report a linewidth of 260kHz, which is the lowest reported for a monolithically integrated laser. The side-mode suppression ratio is >40dB.
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