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:
Oct. 06, 2009
Filed:
Dec. 15, 2005
Sébastien Bigo, Massy, FR;
Eric Barnasson, Massy, FR;
Gabriel Charlet, Villers-le-Bacle, FR;
ALCATEL, Paris, FR;
Abstract
A method for modulating an optical signal includes the following steps: modulating the intensity of the optical signal with a nonreturn-to-zero bit signal, and modulating the phase of the optical signal with a periodic phase-shift signal creating an alternating π-phase shift every second, third or more consecutive bit. An optical transmitter for performing the above method comprises a first modulator () modulating the intensity of the optical signal with a nonreturn-to-zero bit signal, and a second modulator () modulating the phase of the optical signal with a periodic phase-shift signal creating an alternating π-phase shift every second, third or more consecutive bit.