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A 45nm SOI monolithic photonics chip-to-chip link with bit-statistics-based resonant microring thermal tuning
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2015
Year
Unknown Venue
Optical MaterialsEngineeringDevice IntegrationIntegrated PhotonicsOptoelectronic DevicesIntegrated CircuitsOptical Ring ModulatorsPhotonic Integrated CircuitNanophotonicsPhotonicsElectrical EngineeringOptical Chip-to-chip LinkWavelength ConversionComputer EngineeringThermal PhysicsThermal TuningMicroelectronicsPhotonic DeviceMicrowave PhotonicsLaser Self-heating TransientsMicrofabricationWavelength TuningApplied PhysicsIntensity ModulationBit-statistics-based ResonantOptoelectronics
A new thermal tuning circuit for optical ring modulators enables demonstration of an optical chip-to-chip link for the first time with monolithically integrated photonic devices in a commercial 45nm SOI process, without any process changes. The tuning circuit uses independent 1/0 level-tracking and 1/0 bit counting to remain resilient against laser self-heating transients caused by non-DC-balanced transmit data. A 30fJ/bit transmitter and 374fJ/bit receiver with 6μA <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">pk-pk</inf> photocurrent sensitivity complete the 5Gb/s link. The thermal tuner consumes 275fJ/bit and achieves a 600 GHz tuning range with a heater tuning efficiency of 3.8μW/GHz.