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Inventor: Aiso; Keiichi
Address: Tokyo, JP
No. of patents: 6
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 7466479 |
Optical fiber for optical amplifier |
December 16, 2008 |
| By optimizing the refractive index profile, the absorption coefficient of a rare earth element doped optical fiber can be enlarged and nonlinear effect can be suppressed. Thus, according to the present invention, the optical fiber, which is suitable for wide band optical amplification, c |
| 7362939 |
Optical fiber for long period grating, long period grating component and manufacturing method of |
April 22, 2008 |
| This invention relates to an optical fiber for long period grating (LPG), LPG components, and manufacturing method of LPG used as a mode coupler, an optical filter, etc. The optical fiber for LPG comprises a core layer, a first cladding layer that surrounds said core layer and transmits |
| 7206486 |
Optical amplification fiber, optical fiber amplifier, and optical communication system |
April 17, 2007 |
| An optical amplification fiber for an optical fiber amplifier that amplifies a signal light using a pumping light has an absorption coefficient that satisfies conditional relations .alpha.s.gtoreq.2.0 dB/m and .alpha.p/.alpha.s.gtoreq.-0.0697.times..alpha.s+1.30, where .alpha.p is th |
| 7079738 |
Method for manufacturing a glass doped with a rare earth element and fiber for optical amplifica |
July 18, 2006 |
| An optical fiber for optical amplification, characterized in that a full width at half maximum of gain spectrum is 45 nm or more; and a maximum value of power conversion efficiency is 80% or more. A method for producing a rare earth element-doped glass for use in manufacturing the op |
| 6903866 |
Optical fiber for optical amplifier |
June 7, 2005 |
| By optimizing the refractive index profile, the absorption coefficient of a rare earth element doped optical fiber can be enlarged and nonlinear effect can be suppressed. Thus, according to the present invention, the optical fiber, which is suitable for wide band optical amplification, c |
| 6404967 |
Optical fiber and optical transmission line using the same |
June 11, 2002 |
| The present invention provides an optical fiber which has negative dispersion and negative dispersion slope in a wavelength band in use, and can carry out single-mode operation in which distortion due to the non-linear phenomenon can be suppressed so as to be suitable for wavelength |
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