The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2012
Filed:
Feb. 17, 2010
Gerard Berginc, Thials, FR;
Patrick Feneyrou, Igny, FR;
Pierre-antoine Bouit, Lamastre, FR;
Olivier Maury, Brindas, FR;
Marie-chantal Andraud, Genas, FR;
Gerard Berginc, Thials, FR;
Patrick Feneyrou, Igny, FR;
Pierre-Antoine Bouit, Lamastre, FR;
Olivier Maury, Brindas, FR;
Marie-Chantal Andraud, Genas, FR;
Ecole Normale Superieure de Lyon, Thales, FR;
Abstract
The invention relates to a passive optical limiter having a nonlinear material capable of switching in a predetermined optical band from a transparent state to an opaque state as a function of the power of an incident laser beam. The nonlinear material is an organic dye which comprises molecules derived from 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene into which a nitrogen atom is inserted at the meso position, referred to as aza-bodipy molecules, and which have conjugated π chains functionalized so as to exhibit absorption for two photons around an incident beam wavelength lying between 1.45 μm and 1.6 μm.