Heterointegrated III-V/Si distributed feedback lasers

International audienceWith an ever-growing transmission data rate, electronic components reach a limit silicon photonics may overcome. This technology provides integrated circuits in which light is generated within hybrid III-V/Si lasers and modulated to transmit the desired information through silicon waveguides to input/output active/passive components such as wavelength (de-)multiplexers, fiber couplers and photodetectors. Nevertheless, high aggregate bandwidth through wavelength division multiplexing demands for spectrally narrowband lasers with high side-mode suppression ratio (SMSR). Distributed feedback (DFB) lasers offer such a great selectivity. We report hybrid III-V on Silicon DFB lasers emitting at 1550nm and 1310nm. The III-V material is wafer-bonded to patterned silicon-on-insulator (SOI) wafers. The laser cavity is obtained by etching a grating in the silicon, while silicon adiabatic tapers are used to couple light from/to III-V waveguides to/from the passive silicon circuitry, in order to maximize the laser available gain and output power. Gratings are either etched on the top of the silicon waveguide or on its sides, thus relaxing the taper dimension constraint. At 1550nm, the investigated device operates under continuous wave regime with a room temperature threshold current of 70mA, an SMSR as high as 45dB and an optical power in the waveguide higher than 40mW. At 1310nm, a threshold current of 35mA, an SMSR of 45dB and an optical power coupled into a single-mode fiber higher than 1.5mW are demonstrated

Integration challenges for terabit class mid board photonic transceivers

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A device library for the ultra-low loss Si3N4 platform

International audienceSilicon nitride platforms based on ultra-low loss tightly confining waveguides present a great interest for a wide range of applications. We present our 200mm platform based on 800nm-thick LPCVD Si3N4 with optical losses below 5dB/m. It is completed with a set of photonic components specially developed for this platform: grating and edge fiber couplers, directional couplers, MMI, Y-junction, racetrack resonators and an AWG multiplexer. The Si3N4 platform and its device library are the basic building blocks for more complex circuits targeting advanced applications: LiDAR, microwave optics, quantum photonics, neuromorphic computing and sensors

Packaging of photonic integrated circuit based high-speed coherent transmitter module

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Ultra Low-Loss Silicon Waveguides for 200 mm Photonics Platform

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High-speed coherent silicon modulator module using photonic integrated circuits: from circuit design to packaged module

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