Search results for " Microwave photonics"

showing 2 items of 2 documents

Continuous Broadband MWP True-Time Delay with PbS-PMMA and -SU8 waveguides

2016

[EN] A new microwave true-time delay (TTD) photonic unit based on the dispersion of PbS colloidal quantum dots (QDs) in a Polymethyl methacrylate (PMMA) and the SU8 photoresist is presented. With this aim, the PbS-PMMA and PbS-SU8 nanocomposites are integrated on a silicon platform in the form of a planar and ridge waveguides, respectively. When PbS QDs on those structures are pumped below their band-gap, a phase shift and a temporal delay in an optically conveyed (at 1550 nm) microwave signal is performed. The results of these devices show potential benefits over current TTD technologies, since the proposed photonic waveguide structures allows real-time adjustment of the temporal delay by …

Materials scienceOptical fiber02 engineering and technologyOptical signal processingIntegrated microwave photonics7. Clean energySignalOptical waveguide componentsÒptica quànticalaw.inventionNanocompositesOptical pumping020210 optoelectronics & photonicsOpticslawDispersion (optics)TEORIA DE LA SEÑAL Y COMUNICACIONES0202 electrical engineering electronic engineering information engineeringColloidal quantum dots (QDs)Electrical and Electronic EngineeringNanotecnologiabusiness.industryTrue time delayAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsOptical delay linesSemiconductorsOptoelectronicsPhotonicsbusinessWaveguideMicrowave
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Bimodal Approach for Noise Figures of Merit Evaluation in Quantum-Limited Josephson Traveling Wave Parametric Amplifiers

2022

The advent of ultra-low noise microwave amplifiers revolutionized several research fields demanding quantum-limited technologies. Exploiting a theoretical bimodal description of a linear phase-preserving amplifier, in this contribution we analyze some of the intrinsic properties of a model architecture (i.e., an rf-SQUID based Josephson Traveling Wave Parametric Amplifier) in terms of amplification and noise generation for key case study input states (Fock and coherents). Furthermore, we present an analysis of the output signals generated by the parametric amplification mechanism when thermal noise fluctuations feed the device.

Superconducting microwave devicesMicrowave photonicMicrowave amplifiersCondensed Matter - SuperconductivityPhysicsFOS: Physical sciencesMicrowave photonics Noise figure Superconducting microwave devices.Condensed Matter PhysicsNoise figureSettore ING-INF/01 - ElettronicaSuperconducting microwave deviceElectronic Optical and Magnetic MaterialsSuperconductivity (cond-mat.supr-con)BandwidthMicrowave amplifierBandwidth; Gain; Microwave amplifiers; Microwave photonics; Noise figure; Physics; Superconducting microwave devicesMicrowave photonicsHardware_INTEGRATEDCIRCUITSPhysicGainElectrical and Electronic EngineeringPhysics Gain Microwave amplifiers Noise figure Superconducting microwave devices Microwave photonics Bandwidth Microwave photonics noise figure superconducting microwave devicesMicrowave photonics; Noise figure; Superconducting microwave devicesIEEE Transactions on Applied Superconductivity
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