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. 28, 2015
Filed:
Mar. 12, 2008
Yoshinari Awaji, Koganei, JP;
Hideaki Furukawa, Koganei, JP;
Naoya Wada, Koganei, JP;
Ray Man, Kowloon, HK;
Peter Chan, Kowloon, HK;
Eddie Kong, Kowloon, HK;
Yoshinari Awaji, Koganei, JP;
Hideaki Furukawa, Koganei, JP;
Naoya Wada, Koganei, JP;
Ray Man, Kowloon, HK;
Peter Chan, Kowloon, HK;
Eddie Kong, Kowloon, HK;
National Institute of Information and communications Technology, Tokyo, JP;
Amonics Limited, Kowloon, HK;
Abstract
It is an object of the present invention to provide a rare earth doped fiber whose transient response is suppressed and an optical amplifier for optical packet communication having a good characteristic even if there is little traffic. The above-mentioned problem is solved by an optical amplifier for optical packet communication comprising a first rare earth doped fiber (EDFA) having an active region whose diameter is between 3.4 μm and 10 μm, inclusive, an intermediate gain equalizing filter, and a second EDF, wherein the first EDFA is shorter than the second EDFA, and wherein the intermediate gain equalizing filter adjusts the intensity of each wavelength channel so as to equalize the light intensity of each wavelength channel having transmitted through the second EDF.