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:
Aug. 01, 2000
Filed:
Dec. 04, 1997
Yukio Michishita, Tokyo, JP;
Satoshi Ishii, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical amplifier system includes a branching filter for branching into respective wavelengths a wavelength-multiplexed incident light having wavelengths .lambda..sub.1 to .lambda..sub.n, which is inputted from an input port. N optical amplifier sections respectively amplify the branched lights of respective wavelengths. An optical multiplexer multiplexes the amplified lights having the wavelengths .lambda..sub.1 to .lambda..sub.n before outputting the light to an output port. An output control circuit sets the output level of the optical amplifier section to an arbitrary value. With this composition, the present invention is capable of increasing the optical output level per wavelength, independently of the wavelength multiplex number n, when a light signal having n wavelengths is to be amplified.