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:
Dec. 03, 2019
Filed:
Jun. 20, 2017
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Youichi Akasaka, Plano, TX (US);
Tadashi Ikeuchi, Plano, TX (US);
Daniel Bihon, Allen, TX (US);
Richard Colter, Dallas, TX (US);
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/10 (2006.01); H01S 3/067 (2006.01); H04B 10/291 (2013.01); H01S 3/131 (2006.01); H04J 14/02 (2006.01); H01S 3/30 (2006.01); H01S 3/00 (2006.01); G02F 1/31 (2006.01);
U.S. Cl.
CPC ...
H01S 3/10007 (2013.01); G02F 1/31 (2013.01); H01S 3/06754 (2013.01); H01S 3/06758 (2013.01); H01S 3/1312 (2013.01); H04B 10/291 (2013.01); H04B 10/2914 (2013.01); H04B 10/2916 (2013.01); H04J 14/02 (2013.01); H01S 3/0064 (2013.01); H01S 3/0092 (2013.01); H01S 3/302 (2013.01); H01S 2301/02 (2013.01); H01S 2301/03 (2013.01);
Abstract
Phase modulation of an output optical signal from a phase-sensitive amplifier may be used to perform phase adjustment for optimal phase-sensitive amplification. Specifically, when the optical pump is phase modulated to suppress SBS, a second phase modulator may be used to counter dither the first phase modulator. Both phase modulators may be controlled by a phase shifter. Intensity modulation of the output optical signal may also be performed to reduce noise. In this manner, the OSNR of the output optical signal may be increased.