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:
Jun. 26, 2001
Filed:
Jun. 07, 1999
Applicant:
Inventors:
Masahiro Kanda, Tokyo, JP;
Masahiko Namiwaka, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/00 ;
U.S. Cl.
CPC ...
H01S 3/00 ;
Abstract
An optical fiber amplifier includes a signal light source integral with an exciting light source. The optical fiber amplifier has a Fabry-Perot semiconductor laser element having a light emitting element with a wide spectrum. A fiber grating reflects only light having the same wave length as the signal light. The signal light is amplified by an optical fiber, on the broad wave length side of the Fabry-Perot type semiconductor laser element. An inline isolator has a high isolation in the same wave length range as that of the signal light.