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. 21, 2022
Filed:
Oct. 09, 2018
Applicant:
Fujikura Ltd., Tokyo, JP;
Inventor:
Shinichi Sakamoto, Chiba, JP;
Assignee:
FUJIKURA LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 1/42 (2006.01); G01J 1/04 (2006.01); H01S 3/067 (2006.01); G02B 6/02 (2006.01);
U.S. Cl.
CPC ...
G01J 1/4257 (2013.01); G01J 1/0425 (2013.01); H01S 3/06708 (2013.01); G02B 6/02042 (2013.01);
Abstract
A light detection device includes: a first optical fiber including a first core surrounded by a first cladding; a second optical fiber including a second core surrounded by a second cladding; a first cladding mode stripper provided outside the first cladding; a first light detector; and a second light detector. The second core has a diameter larger than a diameter of the first core and is connected to the first core. In a longitudinal direction of the first optical fiber, the first light detector is disposed on one side of the first cladding mode stripper and the second light detector is disposed on another side of the first cladding mode stripper.