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:
Nov. 28, 2000
Filed:
Mar. 17, 1999
Yasuo Suzuki, Kanagawa, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A signal light from a variable wavelength light source and an excitation light from a variable wavelength light source are input to a fiber to be measured. At least either of the signal and the excitation lights is assigned a high power level such that a 4-wave mixing phenomenon is caused within the fiber to be measured. In this way, an FWM light occurs within the fiber to be measured. On a receiving side, the power levels of the FWM and the signal lights are measured, and the generation efficiency of the FWM light is calculated. Since the generation efficiency of the FWM light depends on the dispersion value of the fiber to be measured, the dispersion value is obtained from the generation efficiency of the FWM light by using this dependency. The measurement may be manually made by an operator, or be automatically made.