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:
May. 16, 2006
Filed:
Jan. 29, 2002
Ken Sakuma, Sakura, JP;
Shimon Ishikawa, Sakura, JP;
Tomoko Shikata, Sakura, JP;
Hirokuni Ogawa, Sakura, JP;
Hideyuki Hosoya, Sakura, JP;
Akira Wada, Sakura, JP;
Ken Sakuma, Sakura, JP;
Shimon Ishikawa, Sakura, JP;
Tomoko Shikata, Sakura, JP;
Hirokuni Ogawa, Sakura, JP;
Hideyuki Hosoya, Sakura, JP;
Akira Wada, Sakura, JP;
Fujikura, Ltd., Tokyo, JP;
Abstract
The present invention relates a method for manufacturing an optical coupler/splitter. A Y-shaped waveguide core is formed by focusing a laser beam into a cladding layer that is formed from a glass material. At least one portion of this Y-shaped waveguide core other than the input port and the output ports is treated as a refractive index adjustment area. After the portions of the Y-shaped waveguide core other than the refractive index adjustment area have been formed by focusing a laser beam, signal light is inputted into the input port of the Y-shaped waveguide core and the signal light outputted from the output ports of the Y-shaped waveguide core are monitored. The refractive index of the refractive index adjustment area is determined based on the result of the monitoring and is adjusted by focusing a laser beam repeatedly.