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:
Sep. 21, 1999
Filed:
Feb. 14, 1997
Hiroyuki Iwata, Yokohama, JP;
Haruo Fujiwara, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The invention provides a light branching and insertion apparatus wherein branching and insertion of signal light can be effected accurately with a low loss and with a high degree of accuracy by optical transmission lines of a simple construction. The apparatus includes a first branching element for outputting signal light of a first wavelength from within signal light inputted from a first optical fiber to a third optical fiber and outputting signal light of the other wavelengths to a fourth optical fiber, a first insertion element for outputting signal light inputted from a fifth optical fiber to a second optical fiber, a second branching element for outputting signal light of a second wavelength from within signal light inputted from a sixth optical fiber to an eighth optical fiber and outputting signal light of the other wavelengths to a ninth optical fiber, a second insertion element for outputting signal light inputted from a tenth optical fiber to a seventh optical fiber, a third branching element for outputting signal light of a third wavelength from within signal light inputted from an eleventh optical fiber to the fifth optical fiber and outputting signal light of the other wavelengths to the tenth optical fiber, and a third insertion element for outputting signal light inputted from the ninth optical fiber to a twelfth optical fiber.