Search results for "Hollow-core fibers"

showing 2 items of 2 documents

Sources optiques infrarouges impulsionnelles ultra-courtes et spectralement ultra-larges générées par effet Raman dans les fibres creuses

2019

Gas-filled Hollow-Core Photonic Crystal Fibers (HC-PCF) are efficient tools regarding ultra-wide and coherent optical frequency combs by Stimulated Raman Scattering (SRS). Coherence is reached thanks to highly transient regime as it allows amplification, from quantum to macroscopic level, of a unique spatial and temporal mode (TSM). This results in the generation of Stokes waves with a well-determined phase. The present work details on which time scale coherence can subsist, between two consecutive pulses. The possibility of making a new kind of mode-lock is studied. Then the extreme versatility of gas-filled HC-PCF is illustrated by presenting different kind of new laser sources, exploitin…

Wave synthesisPeignes de fréquencesHollow-core fibers[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicStimulated Raman scatteringFrequency combsSynthèse d’ondesInfraredInfrarougeFibres creusesDiffusion Raman stimulée
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Optoelectronic devices based on caesium lead halide perovskite nanocrystals

2020

Tradicionalmente, la implementación de materiales activos en circuitos fotónicos integrados se ha basado en la utilización de semiconductores III-V y vidrios y materiales ferroeléctricos dopados con iones de tierras raras. Sin embargo, en la actualidad existe una alternativa basada en (nano) materiales sintetizados por técnicas de química coloidal. La posibilidad de procesar nanomateriales en solución permite fabricar semiconductores con propiedades ópticas (emisión, absorción, dispersión de luz) que pueden diseñarse durante la síntesis. Además, su naturaleza coloidal permite integrarlas en cualquier arquitectura óptica mediante sencillas técnicas de impresión en tinta. En este contexto, lo…

nanotechnologyperovskite nanocrystalsoptoelectronicsHollow-core fibersUNESCO::FÍSICAIntegrated opticsperovskite materialscharge transportamplified spontaneous emissionlead halide perovskitesphoton recycling:FÍSICA [UNESCO]optical gain
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