Search results for "delay lines."

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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Advanced Optical Processing of Microwave Signals

2005

The authors present a review on the recent approaches proposed to implement transversal RF filters. Different tunable transversal filters consisting of wavelength tunable optical taps and those employing the tunability of dispersive devices are presented showing their high-performance characteristics. A comprehensive review of the fundamentals and a discussion on the main limitation of these structures are also included.

Optical fiberMaterials sciencemicrowave photonicsoptical fibersdelay lines.Microwave signalslcsh:TK7800-8360Physics::Opticslaw.inventionlcsh:TelecommunicationRf filterslawlcsh:TK5101-6720Electrical and Electronic EngineeringMicrowave photonicsSignal processingbusiness.industrytransversal filterslcsh:ElectronicsOptical processingÒpticaWavelengthHardware and ArchitectureTransversal (combinatorics)Signal ProcessingOptoelectronicsbusinessTelecommunicationsAmplificadors de microonesEURASIP Journal on Advances in Signal Processing
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