Title:
光ファイバおよび光伝送システム
Document Type and Number:
Japanese Patent JP5831189
Kind Code:
B2
Abstract:
Provided is an inexpensive low-loss optical fiber suitably used in an optical transmission network. An optical fiber includes a core, an optical cladding, and a jacket. The core has a relative refractive index difference between 0.2% and 0.32% and has a refractive index volume between 9%·µm 2 and 18%·µm 2 . The jacket has a relative refractive index difference between 0.03% and 0.20%. Glass constituting the core has a fictive temperature between 1400 °C and 1560 °C. Stress remaining in the core is compressive stress. A cutoff wavelength measured on a fiber having a length of 2 m is 1300 nm or more and a cutoff wavelength measured on a fiber having a length of 100 m is 1500 nm or less. An effective area at a wavelength of 1550 nm is 110 µm 2 or more. An attenuation at a wavelength of 1550 nm is 0.19 dB/km or less.
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Inventors:
Tetsuya Nakanishi
Tatsuya Konishi
Kazuya Kuwahara
Tatsuya Konishi
Kazuya Kuwahara
Application Number:
JP2011270269A
Publication Date:
December 09, 2015
Filing Date:
December 09, 2011
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
G02B6/036; C03B37/027; C03C25/10; G02B6/44; G02F1/35
Domestic Patent References:
| JP2002267868A | ||||
| JP2006058494A | ||||
| JP2007052458A | ||||
| JP2008094633A |
Foreign References:
| WO2009066429A1 | ||||
| WO2009096557A1 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Ichira Kondo
Masatoshi Shibata
Yoshiki Kuroki
Ichira Kondo
Masatoshi Shibata