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. 18, 2017
Filed:
Jul. 29, 2013
Applicant:
Nec Corporation, Minato-ku, Tokyo, JP;
Inventors:
Assignee:
NEC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 17/00 (2015.01); H04B 10/516 (2013.01); H04B 10/032 (2013.01); H04B 10/50 (2013.01); H04B 10/079 (2013.01); G02B 6/35 (2006.01);
U.S. Cl.
CPC ...
H04B 10/516 (2013.01); H04B 10/032 (2013.01); H04B 10/0795 (2013.01); H04B 10/50 (2013.01); G02B 6/3546 (2013.01);
Abstract
At least two light-emitting elements emit light to a branching device, and the branching device divides the light that entered into an input port into at least two and emits the light from M number of output ports. An optical modulator individually modulates the M number of light beams that were emitted. When a first light-emitting element driven normally fails, the first light-emitting element is stopped and a second light-emitting element that was stopped is driven, thereby maintaining the emission of the modulated M number of light beams.