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:
Dec. 30, 2014
Filed:
May. 09, 2011
François Bondu, Servon sur Vilaine, FR;
Marc Brunel, Rennes, FR;
Mehdi Alouini, Gosne, FR;
Marc Vallet, Thorigne-Fouillard, FR;
Goulc'hen Loas, Saint Aubin d'Auligne, FR;
Marco Romanelli, Rennes, FR;
François Bondu, Servon sur Vilaine, FR;
Marc Brunel, Rennes, FR;
Mehdi Alouini, Gosne, FR;
Marc Vallet, Thorigne-Fouillard, FR;
Goulc'hen Loas, Saint Aubin d'Auligne, FR;
Marco Romanelli, Rennes, FR;
Centre National de la Recherche Scientifique, Paris, FR;
Abstract
In the field of the production of very high frequencies, for example from 1 gigahertz to several terahertz, by beating the frequencies of two laser beams together, a device includes a resonant optical cavity having very stable dimensions receiving the beams, with for each beam, an interrogation device of the resonant cavity supplying an electrical signal representing the difference in frequency between the light frequency of the beam and a resonance frequency of the resonant cavity. The frequency of each beam is servo controlled to minimize the frequency difference observed. The laser beams are produced by a dual-frequency laser producing two beams of different frequencies and orthogonal polarizations. A polarization separator is used for separate servo control of the beams according to polarization, and a polarizer is placed behind a main output of the resonant cavity producing an electromagnetic beam mixing the two polarizations and amplitude-modulated at the beat frequency.