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:
May. 24, 2005
Filed:
Nov. 28, 2001
Gentaro Ishihara, Tokyo, JP;
Tohru Mori, Tokyo, JP;
Gentaro Ishihara, Tokyo, JP;
Tohru Mori, Tokyo, JP;
Ando Electric Co., Ltd., Tokyo, JP;
Abstract
Output light spectrum P(λ) data from an optical amplifier and input light spectrum P(λ) data of signal light are prepared, the difference between the P(λ) and a value obtained by multiplying the P(λ) by a provisional gain GT is determined (Steps S), for the obtained spectrum data, a noise removing process such as a moving average process and the like is performed and then, a spline interpolation process is also performed, whereby ASE light spectrum P(λ) data is prepared and an ASE light level P ASE is determined (Steps Sthrough S). In addition, a noise figure-measuring devicecalculates the number of channels of WDM light and signal light wavelengths of the respective channels based on the P(λ) or P(λ), and performs analysis to calculate a noise figure NF and the like of an appointed wavelength range around the center of each wavelength thus calculated.