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. 29, 2008
Filed:
Apr. 21, 2004
Isabelle Riant, Orsay, FR;
Christian Belouet, Sceaux, FR;
Isabelle Riant, Orsay, FR;
Christian Belouet, Sceaux, FR;
ALCATEL, Paris, FR;
Abstract
A tunable optical filter comprising an index grating produced in a waveguide defining a longitudinal direction of propagation of an incident optical signal, said grating being defined by a plurality of optical parameters, is characterized in that the optical guide contains semiconductor nanoparticles and in that the index grating is made up of a refractive index variation in the guide that is at least partly induced by a Kerr effect linked to the 3order dielectric susceptibility (χ) of said nanoparticles, at least one of said parameters of said index grating being modified by application of an optical control signal coupled into the guide and propagating longitudinally in said guide.