Title:
増幅用光ファイバ、及び、それを用いた光ファイバ増幅器及び共振器
Document Type and Number:
Japanese Patent JP4667535
Kind Code:
B1
Abstract:
The invention provides an amplification optical fiber, which can output light with a good beam quality even when a higher-order mode is excited, and an optical fiber amplifier using the amplification optical fiber. An amplification optical fiber 50 has a core 51 and a clad 52 covering the core 51. The core 51 propagates light with a predetermined wavelength in at least an LP01 mode, and an LP02 mode, and an LP03 mode. When the LP01 mode, the LP02 mode, and the LP03 mode are standardized by power, in at least a part of a region where the intensity of the LP01 mode is larger than at least one of the intensities of the LP02 mode and the LP03 mode, the active element is added to the core 51 at a higher concentration than the central portion of the core.
Inventors:
Kashiwagi Masahiro
Kuniharu Himeno
Kuniharu Himeno
Application Number:
JP2010246360A
Publication Date:
April 13, 2011
Filing Date:
November 02, 2010
Export Citation:
Assignee:
Fujikura Ltd.
International Classes:
H01S3/06; H01S3/10
Domestic Patent References:
| JP2006128384A | 2006-05-18 | |||
| JP2003008114A | 2003-01-10 | |||
| JP2006516811A | 2006-07-06 |
Foreign References:
| WO2003067723A1 | 2003-08-14 |
Attorney, Agent or Firm:
Yasuo Morimura
Hiroaki Aoki
Hiroaki Aoki