Title:
YTTERBIUM-DOPED OPTICAL FIBER, FIBER LASER, AND FIBER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2010/055696
Kind Code:
A1
Abstract:
Disclosed is an ytterbium-doped optical fiber comprising a core and a clad which surrounds the core, wherein the core contains ytterbium, aluminum and phosphorus and does not contain germanium. In the core, ytterbium is contained in an amount of 0.09 to 0.68 mol% in terms of ytterbium oxide content, the molar ratio of the content of phosphorus (in terms of diphosphorus pentaoxide content) to the content of ytterbium (in terms of ytterbium oxide content) is 3 to 30, the molar ratio of the content of aluminum (in terms of aluminum oxide content) to the content of ytterbium (in terms of ytterbium oxide content) is 3 to 32, and the molar ratio of the content of aluminum (in terms of aluminum oxide content) to the content of phosphorus (in terms of diphosphorus pentaoxide content) is 1 to 2.5.
Inventors:
NAKAGUMA TERUNO (JP)
ICHII KENTARO (JP)
TANIGAWA SHOJI (JP)
ICHII KENTARO (JP)
TANIGAWA SHOJI (JP)
Application Number:
PCT/JP2009/006136
Publication Date:
May 20, 2010
Filing Date:
November 16, 2009
Export Citation:
Assignee:
FUJIKURA LTD (JP)
NAKAGUMA TERUNO (JP)
ICHII KENTARO (JP)
TANIGAWA SHOJI (JP)
NAKAGUMA TERUNO (JP)
ICHII KENTARO (JP)
TANIGAWA SHOJI (JP)
International Classes:
G02B6/02; H01S3/06; G02B6/024; G02B6/036
Foreign References:
| JPH11112070A | 1999-04-23 | |||
| JP2002043660A | 2002-02-08 | |||
| JP2006519495A | 2006-08-24 | |||
| JPH09194225A | 1997-07-29 | |||
| JPH01298043A | 1989-12-01 | |||
| JP2003124547A | 2003-04-25 | |||
| JP2007114335A | 2007-05-10 | |||
| JPH11112070A | 1999-04-23 |
Other References:
D.J. DIGIOVANNIA ET AL.: "Structure and properties of silica containing aluminum and phosphorus near the A1P04 join", JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 113, no. ISS.1, 2 November 1989 (1989-11-02), pages 58 - 64, XP024065480
MING-JUN LI: "Effective Area Limit for Large Mode Area Laser Fibers", THE PROCEEDINGS OF OFC 2008, OTUJ2, 2008
S. TAMMELA ET AL.: "The Potential of Direct Nanoparticle Deposition for the Next Generation of Optical Fibers", THE PROCEEDING OF SPIE PHOTONICS WEST 2006, vol. 6116-16, 2006
T. KITABAYASHI: "Population Inversion Factor Dependence of Photodarkening of Yb-doped Fibers and its Suppression by Highly Aluminum Doping", THE PROCEEDINGS OF OFC 2006, OTHC5, 2006
M. ENGHOLM: "Preventing photodarkening in ytterbium-doped high power fiber laser; correlation to the UV-transparency of the core glass", THE PROCEEDING OF OPTICS EXPRESS, vol. 16, 2008, pages 1260 - 1268
MING-JUN LI: "Effective Area Limit for Large Mode Area Laser Fibers", THE PROCEEDINGS OF OFC 2008, OTUJ2, 2008
S. TAMMELA ET AL.: "The Potential of Direct Nanoparticle Deposition for the Next Generation of Optical Fibers", THE PROCEEDING OF SPIE PHOTONICS WEST 2006, vol. 6116-16, 2006
T. KITABAYASHI: "Population Inversion Factor Dependence of Photodarkening of Yb-doped Fibers and its Suppression by Highly Aluminum Doping", THE PROCEEDINGS OF OFC 2006, OTHC5, 2006
M. ENGHOLM: "Preventing photodarkening in ytterbium-doped high power fiber laser; correlation to the UV-transparency of the core glass", THE PROCEEDING OF OPTICS EXPRESS, vol. 16, 2008, pages 1260 - 1268
Attorney, Agent or Firm:
SHIGA, Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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