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:
Apr. 11, 2017
Filed:
Jun. 21, 2013
Applicant:
Alcatel Lucent, Boulogne Billancourt, FR;
Inventors:
Assignee:
Alcatel Lucent, Boulogne-Billancourt, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/00 (2013.01); H04B 10/12 (2006.01); H04B 10/54 (2013.01); H04B 10/50 (2013.01); H04B 10/564 (2013.01);
U.S. Cl.
CPC ...
H04B 10/54 (2013.01); H04B 10/504 (2013.01); H04B 10/564 (2013.01);
Abstract
An optical transmitter for transmitting a multilevel amplitude-shift-keying modulated signal includes an optical modulator for modulating an optical signal with a multilevel amplitude-shift-keying modulation, and a spectral filter adapted to increase a high-frequency component of the modulated optical signal relatively to a central frequency component. The multilevel ASK modulation is quaternary ASK and the symbol rate of the optical modulator is above 40 Gbaud. An optical link connects the optical transmitter to a quadratic direct detection optical receiver.