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. 02, 2022
Filed:
Aug. 26, 2019
Yokogawa Electric Corporation, Tokyo, JP;
Satoshi Matsuura, Tokyo, JP;
Yoshihiro Kumagai, Tokyo, JP;
Vokogawa Electric Corporation, Tokyo, JP;
Abstract
An optical fiber characteristic measurement apparatus () includes: a light source () configured to output a laser beam of which frequency is modulated; an incident part (, and) configured to make the laser beam output from the light source be incident from one end and another end of an optical fiber (FUT) as continuous light (L) and pulsed light (L), respectively; a light detector () configured to detect light projected from the optical fiber and output a detection signal (D); and a detector (and) configured to detect, in a first period (T) in which scattering light based on the continuous light and the pulsed light is projected from the optical fiber and a second period (T) shorter than the first period, in which the scattering light is not projected from the optical fiber, the scattering light based on integrated values acquired by integrating the detection signal for a predetermined time.