Objectif The research covers two major areas: lasers and non-linear optics (LNO); and non-local hydrodynamic transport and fluctuations (NLHF). Concerning LNO, two subjects will be investigated from a fundamental point of view: the amplification and lasing without inversion (ALWI),and the weakly multimode lasers (WML). Concerning ALWI the major goal will be to find a universal form of amplification condition for a multilevel system and to conduct a fully quantum mechanical analysis in order to derive a master equation and to determine the relative role of coherent and incoherent pumping in the process of ALWI. For WML the specific purposes are to determine via dynamical measurements the phase nonreciprocity and to investigate the nature of new types of nonstationary regimes which this nonreciprocity implies in ring lasers and to develop multimode phase-sensitive models of semiconductor lasers. The investigation will clarify the mechanism of inversionless gain and will provide a way to the solution of some controversies of laser dynamics to define some laser parameters from the dynamic behavior. Concerning NLHF, two connected problems will be treated: nonlocal hydrodynamic transport and non linear fluctuations in a plasma. The first problem will allow the study of the domain of validity of the Onsager's reciprocity relations in constrained systems. A generalized Balescu-Lenard collision integral will be derived and will be used for the study of fluctuations, excitation spectrum and dynamic form factor of a non ideal plasma. For the second problem, a general exact integral equation for plasma fluctuations will be obtained. This equation includes generalized miscroscopic dielectric function (GMDF). It will be used to describe plasma wave trapping in plasma inhomageneities. Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Thème(s) 12 - Atomic Structure, Lasers and Optics Appel à propositions Data not available Régime de financement Data not available Coordinateur Université Libre de Bruxelles Contribution de l’UE Aucune donnée Adresse Campus Plaine - Boulevard du Triomphe 1050 Bruxelles Belgique Voir sur la carte Coût total Aucune donnée Participants (3) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire Russian Academy of Sciences Russie Contribution de l’UE Aucune donnée Adresse 142092 Troitzk, Moscow Region Voir sur la carte Coût total Aucune donnée Russian Academy of Sciences Russie Contribution de l’UE Aucune donnée Adresse 603600 Nizhny Novgorod Voir sur la carte Coût total Aucune donnée Université Libre de Bruxelles Belgique Contribution de l’UE Aucune donnée Adresse 1050 Bruxelles Voir sur la carte Coût total Aucune donnée