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. 05, 2012
Filed:
Oct. 26, 2006
Takashi Shimizu, Kawasaki, JP;
Shinya Inagaki, Kawasaki, JP;
Tomoaki Takeyama, Kawasaki, JP;
Keiko Sasaki, Kawasaki, JP;
Takashi Shimizu, Kawasaki, JP;
Shinya Inagaki, Kawasaki, JP;
Tomoaki Takeyama, Kawasaki, JP;
Keiko Sasaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention has an object to provide an optical amplifier capable of realizing a good response characteristic in a wide frequency band, even when a population inversion state is formed by a pumping light supplied to an optical amplification medium and an ASE light generated in the optical amplification medium. To this end, in the optical amplifier according to the present invention, a delayed phase matching fiber in which a first fiber whose response speed is relatively low is arranged on the input side and a second fiber whose response speed is relatively high is arranged on the output side, is used as the optical amplification medium doped with a rare-earth element.