Centre National De La Recherche Scientifique

Universitë De Bordeaux

Amplitude Systemes

Eolite Systems

Ilasis Laser

Université De Bordeaux I

François Salin

Jens Limpert

Clemens Honninger

Eric Mottay

Antoine Courjaud

Philippe Metivier

Florent Deloison

David Horain

Louis Mcdonagh

Julien Saby

Pierre Deslandes

A composite optic fibre for laser includes a core surrounded with a pump guiding sheath in contact with the core, sheath being a photonic structure formed by a substantially regular matrix assembly of coaxial capillaries, spaced apart and arranged parallel to the core, the core being a material with doping elements which may be brought into at least one excited electronic state by absorbing the energy from a pump optical signal of a first determined wavelength running through the core and capable of giving-back the former by de-energization in the form of an optical signal of a second determined wavelength, the core having a determined diameter and the sheath having a determined diameter. The diameter of the guiding sheath is greater than the core diameter and smaller than or equal to four times the core diameter, the core diameter being greater than or equal to 35 micrometers.

Composite optic fibre for laser with pump and laser wave confinement, applications to lasers

A rare earth ion ultrashort laser source includes a resonant cavity having a first output face partially reflecting and a second reflecting face. The source also includes a first active material, which receives a pump luminous flux transmitted via a first solid laser pump source. The resonant cavity exhibits a length of optical path travelled by the pulses greater than 7.5 m so that the pulsed energy Eis greater than 100 nJ, the optical path including at least one passage in the active material and the ultrashort laser source includes elements for lengthening the resonant cavity thereby enabling to extend the length of the optical path travelled by the luminous pulses in the resonant cavity, the ABCD propagation matrix of the resonant cavity being close to the unit matrix so that the features of the luminous beam going back and forth in the resonant cavity remain unchanged.

Ultra-short laser source with rare earth ions and stable pulse train and device for lengthening a laser cavity

Growing community of inventors

Gradignan, France

François Salin