Title:
光ファイバ
Document Type and Number:
Japanese Patent JP6551137
Kind Code:
B2
Abstract:
An optical fiber having a reduced attenuation includes a silica glass core and a silica glass cladding. The silica glass core has substantially no germanium and includes a first core and a second core. The second core encloses the first core, the refractive index of the second core is larger than the refractive index of the first core, and the average value of halogen concentration of the second core is 5000 ppm or more. The silica glass cladding surrounds the second core and contains substantially no germanium. The refractive index of the cladding is smaller than the refractive index of the first core.
Inventors:
Kinsho Tamura
Tetsuya Haruna
Masaaki Hirano
You Sakuma
Tetsuya Haruna
Masaaki Hirano
You Sakuma
Application Number:
JP2015203490A
Publication Date:
July 31, 2019
Filing Date:
October 15, 2015
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
G02B6/036; G02B6/02
Domestic Patent References:
| JP2012229150A | ||||
| JP2013174867A | ||||
| JP2009541796A | ||||
| JP2013061620A |
Foreign References:
| US20030026566 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
High Kunio Ki
Shotaro Terasawa
Masatoshi Shibata
Yoshiki Kuroki
High Kunio Ki
Shotaro Terasawa
Masatoshi Shibata