Title:
YTTERBIUM-ADDED OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2010/052940
Kind Code:
A1
Abstract:
Disclosed is a ytterbium-added optical fiber comprising a core containing at least ytterbium, aluminum and phosphorus and a clad surrounding the core. The ratio of the molar concentration of phosphorus, in terms of diphosphorus pentaoxide, in the core to the molar concentration of ytterbium, in terms of ytterbium oxide, in the core is not less than 10 and not more than 30, and the difference in specific refractive index between the core and the clad is not less than 0.05% and not more than 0.30%.
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Inventors:
ICHII KENTARO (JP)
TANIGAWA SHOJI (JP)
ARAI TOMOFUMI (JP)
TANIGAWA SHOJI (JP)
ARAI TOMOFUMI (JP)
Application Number:
PCT/JP2009/052064
Publication Date:
May 14, 2010
Filing Date:
February 06, 2009
Export Citation:
Assignee:
FUJIKURA LTD (JP)
ICHII KENTARO (JP)
TANIGAWA SHOJI (JP)
ARAI TOMOFUMI (JP)
ICHII KENTARO (JP)
TANIGAWA SHOJI (JP)
ARAI TOMOFUMI (JP)
International Classes:
H01S3/06
Foreign References:
| JPH11112070A | 1999-04-23 | |||
| JPH01298043A | 1989-12-01 | |||
| JP2003124547A | 2003-04-25 |
Other References:
D.J. DIGIOVANNIA ET AL.: "Structure and properties of silica containing aluminum and phosphorus near the AlPO4 join", JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 113, no. ISS.1, 2 November 1989 (1989-11-02), pages 58 - 64
Attorney, Agent or Firm:
SHIGA, Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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