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:
Apr. 09, 2019
Filed:
Nov. 02, 2017
Hitachi Metals, Ltd., Tokyo, JP;
Ntt Communications Corporation, Tokyo, JP;
Kanako Suzuki, Tokyo, JP;
Koki Hirano, Tokyo, JP;
Mikio Ohkoshi, Tokyo, JP;
Wataru Ohnuki, Tokyo, JP;
Yoshihiro Nakatani, Tokyo, JP;
Takao Nishikawa, Tokyo, JP;
Toshiyuki Suzuki, Saitama, JP;
Toshio Sakai, Tokyo, JP;
HITACHI METALS, LTD., Tokyo, JP;
NTT COMMUNICATIONS CORPORATION, Tokyo, JP;
Abstract
An optical fiber monitoring system monitors an inter-building optical fiber connecting a first building and a second building. The optical fiber monitoring system includes a first visualization panel provided in the first building and optically connected to an one end of the inter-building optical fiber, a second visualization panel provided in the second building and optically connected to an other end of the inter-building optical fiber, and a monitoring light source provided in the first building to input a monitoring light into the inter-building optical fiber. The first visualization panel includes a first photosensor that partially leaks the monitoring light inputted into the inter-building optical fiber from the monitoring light source and detects an amount of a leaked light. The second visualization panel includes a second photosensor that partially leaks a light from the inter-building optical fiber and detects amount of a leaked light.