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:
Jun. 29, 2021
Filed:
Oct. 16, 2019
Applicant:
Yokogawa Electric Corporation, Tokyo, JP;
Inventor:
Osamu Furukawa, Tokyo, JP;
Assignee:
YOKOGAWA ELECTRIC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/00 (2006.01); G01M 11/00 (2006.01); G01M 11/02 (2006.01);
U.S. Cl.
CPC ...
G01M 11/319 (2013.01); G01M 11/0207 (2013.01);
Abstract
An optical fiber characteristic measurement device includes: a detector that detects Brillouin scattered light obtained by causing light to be incident on an optical fiber under test; a spectrum analyzer that obtains a Brillouin gain spectrum from the Brillouin scattered light; and a spectrum analyzing controller that: measures a characteristic of the optical fiber under test by analyzing the Brillouin gain spectrum to obtain a peak frequency of the Brillouin gain spectrum, and changes a frequency range used by the spectrum analyzer to obtain the Brillouin gain spectrum according to the peak frequency.