Objective
The objective of this project is to study two types of collective behavior in a laser systems with a large number of globally coupled degrees of freedom, namely antiphased dynamics (AD) in a multimode laser and lasing without inversion (LWI) in a multilevel medium. This project focuses on a new generation of lasers: diode-pumped solid-state (DPSS) lasers with and without intracavity second harmonic generation(SHG) and lasers with and without inversion.
Both theoretical and experimental studies are planned for this project. The theoretical research and experiments will be done to study AD in a DPSS laser with intracavity frequency doubling and in a semiconductor laser. Particular attention will be paid to a study of dynamical independence of AD in a multimode laser with intracavity SHG, when modes oscillating in one polarization of the electric field may be practically insensitive to changes occurring to the modes oscillating in the orthogonal polarization.
The dynamical independence of AD in lasers provides the possibility of switching between different antiphased states in one set through the influence of the other set. This is the basis for a method of sre information transmission for which, both transmitter and receiver are multimode lasers with intracavity SHG, coupled by the injection of the chaotic radiation of an isolated mode of the transmitter into the mode of the receiver with the same polarization.
Switching between antiphased states in the transmitter produces a phase shift in the chaotic isolated mode injected into the receiver that provides the corresponding switching between antiphase states of the receiver. Numerical simulation of the proposed scheme will be done in order to establish the technical and the physical limitations.
The numerical investigation of the breakup of multimode operation resulting from the Auger recombination process will be done to study new challenging instabilities and AD associated with the deformation of the spatial distribution of population inversion which were demonstrated experimentally.
Experimental investigation of the influence of Auger processes in multimode semiconductor lasers will be performed.
Dynamical regimes and their instabilities in an inversionless ring laser will be investigated in the simplest three- and four-level LWI schemes. The bistability domains where stable nonlasing solution coexist with a stable regime with nonzero laser field amplitude will be localized in the parameter space and the conditions for the stable short pulse generation will be determined by numerical simulation and with the help of algorithms based on the bifurcation theory methods.
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Programme(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Coordinator
1050 Bruxelles
Belgium
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.