Subject: Lasers of high continuous power have a very wide range of industrial, military and scientific applications,
military and scientific applications. Among the various optical components of a laser system, filters based on optical thin films are
Among the various optical components of a laser system, filters based on optical thin films are key elements to functionalize the surfaces (anti-reflection,
mirrors, dichroics). Despite absorption levels that can go down to the order of
part per million (ppm) in the layers, the heating induced under high laser power is a limitation for the
constitute a limitation for the laser performances, ranging from wavefront deformation to eventual damage of the
damage to the optics. In a context of increasing power of laser sources
sources, the objective of the thesis is the development of components allowing to limit the thermal effects, by
thermal effects, by optimizing manufacturing technologies (choice of materials and deposition parameters), by optimizing
(choice of materials and deposition parameters), by optimizing designs (minimization of electric fields), and by controlling the
local absorption of components (by creating a controlled absorption profile for example in order to
uniform spatial distribution of absorbed energy).
Funding: CIFRE
Duration: 36 months - start as soon as possible
Contact : Laurent Gallais, Catherine Grèzes-Besset, Julien Lumeau
Tel. : +33 6 20 98 69 46 / +33 4 42 36 97 08 / +33 6 72 28 90 71
e-mail : laurent.gallais@fresnel.fr / GREZES-BESSET@cilas.com / julien.lumeau@fresnel.fr
ResearchGate
Flux RSS