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Optical amplifier fiber

A technology of optical amplification and optical fiber, which is applied in the direction of cladding optical fiber, optical waveguide light guide, microlithography exposure equipment, etc., and can solve the problem of not being able to fully suppress nonlinear optical phenomena

Inactive Publication Date: 2006-11-22
SUMITOMO ELECTRIC IND LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the optical amplifying optical fibers disclosed in Japanese Patent Application Laid-Open No. 2004-146681 and Japanese Patent Application Laid-Open No. 2002-043660, when an attempt is made to increase the output light intensity, the occurrence of nonlinear optical phenomena cannot be sufficiently suppressed

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Embodiment Construction

[0026] Embodiments of optical amplifier and optical fiber for optical amplification

[0027] figure 1 is a schematic diagram of an optical amplifier according to an embodiment of the present invention. The optical amplifier 1 includes an optical amplifying optical fiber 10, connecting optical fibers 20 and 30, an optical coupler 40, and a pumping light source 50, and the optical amplifier 1 amplifies the light input to the input port 1a, and outputs the amplified light from the output port 1b. Light.

[0028] Figure 2A and 2B is a schematic diagram of an optical fiber for optical amplification according to an embodiment of the present invention, wherein, Figure 2A is a cross-sectional view of a plane perpendicular to the optical axis, Figure 2B A graph of the refractive index profile is shown. Optical amplifying optical fiber 10 is mainly composed of silica glass, and has a core region 11 doped with erbium, aluminum and fluorine elements, and a cladding region 12 surr...

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Abstract

Provided is an optical amplifier fiber in which both increasing output light power and sufficiently inhibiting the occurrence of nonlinear optical phenomenon can be compatibly achieved. In addition, an optical amplifier and light source equipment, in which such optical amplifier fiber is used, are provided. The optical amplifier fiber comprises (1) a core region doped with an aluminum element in the range of 1 wt % to 10 wt %, an erbium element in the range of 1000 wt. ppm to 5000 wt. ppm, and a fluorine element, the core region having an outer diameter in the range of 10 mum to 30 mum, and (2) a cladding region surrounding the core region and having a refractive index that is lower than the core region, wherein the relative refractive index difference of the core region relative to the cladding region is 0.3% or more and 2.0% or less.

Description

technical field [0001] The present invention relates to an optical amplifying optical fiber whose core region is doped with rare earth elements, and also relates to an optical amplifier in which the optical amplifying optical fiber is used as an optical amplifying medium. Background technique [0002] Generally, an optical amplifier can amplify signal light by using an optical amplifying fiber as an optical amplifying medium and supplying pump light to the optical amplifying optical fiber. For example, an erbium-doped fiber amplifier (EDFA) can amplify signal light in a 1.55 μm band generally used in an optical communication system, and the erbium-doped fiber amplifier is installed in an optical repeater in the optical communication system. [0003] The required characteristics of an optical amplifier are that its output light intensity is relatively large, and that nonlinear optical phenomena in the optical fiber for optical amplification do not occur significantly. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02A61F9/008G02F1/35G02F1/37G03F7/20H01S3/067H01S5/00
CPCH01S3/06716
Inventor 春名彻也樽稔树大西正志角井素贵石川真二
Owner SUMITOMO ELECTRIC IND LTD
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