Objetivo Research objectives and content Light is confined in 100 pim silica microspheres, by total internal reflection, in a wavelength-sized equatorial ring. Whispering-gallery modes (WGM) yield high-Q resonances (photon lifetime 1 ms). The electric field per photon is high and strong cavity effects are expected. This made it possible to realize low threshold microlaser with Nd-doped microspheres. Nd microlasers are now studied at low temperatures to achieve thresholdless regime with a few active ions. The quantum effects associated to the dynamics of these lasers will be studied in details. These experiments are expected to bring information on neodymium ions in silica. They are a step toward Cavity QED experiments with a few atoms coupled to a WGM. At room temperature, up-conversion in erbium can provide green laser light with a pump diode laser at 800 nm. Laser action has not been demonstrated in silica fibers. Since microspheres are efficient laser cavities, Er-doped microspheres are tested for laser action. Training content (objective, benefit and expected impact) I will improve my knowledge on: - diode lasers, integrated optics, high efficiency detection, high resolution spectroscopy. - cryogenics. I also expect theoretical training in: - Quantum Optics - Cavity-QED in the optical domain Links with industry/industrial relevance - Patents on special microlasers (green microlasers) - Contacts with CNET-France Telecom. Ámbito científico engineering and technologymaterials engineeringfibersnatural sciencesphysical sciencesquantum physicsquantum opticsnatural sciencesphysical sciencesopticslaser physicsnatural sciencesphysical sciencestheoretical physicsparticle physicsphotonsnatural sciencesphysical sciencesopticsspectroscopy Programa(s) FP4-TMR - Specific research and technological development programme in the field of the training and mobility of researchers, 1994-1998 Tema(s) 0301 - Post-graduate research training grants TP04 - Optics Convocatoria de propuestas Data not available Régimen de financiación RGI - Research grants (individual fellowships) Coordinador ECOLE NORMALE SUPERIEURE Aportación de la UE Sin datos Dirección 24,Rue Lhomond 24 75231 PARIS Francia Ver en el mapa Coste total Sin datos Participantes (1) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Not available Alemania Aportación de la UE Sin datos Dirección Ver en el mapa Coste total Sin datos