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:
Jun. 25, 2019
Filed:
Aug. 18, 2016
Centre National DE LA Recherche Scientifique, Paris, FR;
Universite DE Lille, Lille, FR;
Jean-François Lampin, Templeuve, FR;
Antoine Pagies, Lille, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
UNIVERSITE DE LILLE, Lille, FR;
Abstract
A terahertz laser suitable for emitting at least one first electromagnetic radiation, a first emission frequency of which is between 700 and 1200 GHz. The laser comprises an infrared laser source and a resonant cavity arranged to be optically pumped by the infrared laser source, the resonant cavity containing ammonia gas as an amplifier medium and having at least one configuration in which the resonant cavity is a resonant cavity at the first emission frequency. The infrared laser source is a continuous semiconductor laser source capable of exciting molecules of the amplifier medium from an initial energy level to at least one first excited energy level, the molecules of the amplifier medium placed in the first energy level being able to relax through a pure inversion transition for which the relaxation energy corresponds to the first emission frequency.