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:
May. 19, 2009
Filed:
Apr. 20, 2005
Emmanuel Dotaro, Bures-sur-Yvette, FR;
Nicolas Le Sauze, Bures-sur Yvette, FR;
Emmanuel Dotaro, Bures-sur-Yvette, FR;
Nicolas Le Sauze, Bures-sur Yvette, FR;
Alcatel, Paris, FR;
Abstract
The network comprises an optical interconnection tree linking sending points of stations to a receiving point of a concentrator via access links (F-F), a coupling system (C) and a common optical link (OL). The stations can send optical signals (λu, λu, λu) each carried by the same 'uplink' wavelength (λu). Each station includes a carrier detection system able to detect the presence at its sending point (Ki) of an optical wave at said uplink wavelength (λu) that was not sent by the same station. The detection system cooperates with sending control means to inactivate sending if such presence is detected. The network further includes: an emulator (LDa, Ca, G-G) adapted to send auxiliary waves (λa, λa, λa) at said uplink wavelength (λu) and to couple them into the access links (F-F) so that they propagate in the downlink propagation direction; and a control system () of the emulator for selectively activating the sending of the auxiliary waves. The invention is particularly applicable to optical access or metropolitan networks.