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:
Jan. 04, 2005
Filed:
Jun. 26, 2003
Frederic Seguineau, Bures Sur-Yvette, FR;
Olivier Leclerc, Sainte Geneviéve des Bois, FR;
Frederic Seguineau, Bures Sur-Yvette, FR;
Olivier Leclerc, Sainte Geneviéve des Bois, FR;
Alcatel, Paris, FR;
Abstract
A demultiplexer for an optical time-division multiplexed digital signal, which has a signal wavelength λand is transmitted with a bit rate B, is described. It comprises a Raman active optical medium, a pump source for generating a periodic optical pump signal having a pump wavelength λand a periodicity of B/n where n is an integer ≧2, and a coupler for coupling the digital signal and the pump signal into the Raman active optical medium. The new demultiplexer exploits the non-linear Raman gain response of the Raman active medium to a high power pump signal and has a narrow time window and a high extinction ratio.