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. 24, 2004
Filed:
Oct. 24, 2002
Ando Electric Co., Ltd., Tokyo, JP;
Abstract
A wavelength dispersion distribution measuring apparatus of an optical fiber includes light signal generation section for generating two light signals with different wavelengths, section for combining the signals and shaping a light pulse signal, directional coupling section for inputting the light pulse signal to one end or the other end of a measured optical fiber and also branching total back-scattered light from the measured optical fiber, wavelength extraction section for passing only a wavelength component of one of four-wave mixed light generated by interaction of two wavelengths launched, measuring section for measuring wavelength dispersion distribution data, changeover section - to - for switching the input side and the terminal side of the light pulse from one end to the other end of the measured optical fiber, and calculation section for performing superimposition processing of two measured results associated with the switching.