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:
Dec. 02, 2003
Filed:
Jun. 27, 2000
Ryu Yokoyama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical signal repeater, in which an output level of each optical signal of WDM optical signals does not change even when the number of wavelengths of inputted WDM optical signals changes, amplifies WDM optical signals transmitted from an optical transmitter via an optical fiber transmission line. A pumping light source outputs pumping light used for amplifying the WDM optical signal. A multiplexer transmits the pumping light to an amplifier, and a splits the amplified WDM optical signals into two parts. A wavelength selection type reflector reflects only an optical signal having a specified wavelength in one part of the amplified WDM optical signals. An automatic output level controller controls the pumping light output from the pumping light source so that the power level becomes a designated level. A reflected optical signal transmitter transmits the optical signal having the specified wavelength reflected to the automatic output level controller.