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:
Nov. 17, 2015
Filed:
Oct. 17, 2013
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventor:
Hiroyuki Itoh, Kawasaki, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/067 (2006.01); H01S 3/10 (2006.01); H01S 3/13 (2006.01); H01S 3/00 (2006.01); H04B 10/079 (2013.01); H04B 10/291 (2013.01); H01S 3/0941 (2006.01); H01S 5/0683 (2006.01);
U.S. Cl.
CPC ...
H01S 3/06754 (2013.01); H01S 3/0014 (2013.01); H01S 3/10015 (2013.01); H01S 3/1301 (2013.01); H04B 10/0797 (2013.01); H04B 10/07955 (2013.01); H04B 10/2918 (2013.01); H01S 3/09415 (2013.01); H01S 3/10069 (2013.01); H01S 5/0683 (2013.01);
Abstract
An apparatus and method of failure detection in optical amplifier is disclosed. The optical amplifier includes an optical amplifying fiber configured to receive input light so that the input light travels through the optical amplifying fiber, an excitation light generator configured to supply excitation light to the optical amplifying fiber to optically amplify the input light as the input light travels through the optical amplifying fiber, and a processor configured to determine whether a failure has occurred in the optical amplifier, based on a change in power of the excitation light and a change in power of the input light.