Optical waveguide material as well as method and device for producing it

A technology of optical waveguides and optical materials, applied in the directions of optical waveguides, glass manufacturing equipment, lighting and heating equipment, etc., can solve problems such as harmful optical properties and mechanical properties, and achieve shortened residence time, high combustion temperature, and shortened effective residence time. effect of time

Inactive Publication Date: 2007-06-20
LIEKKI OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is also taught to reduce the so-called void defects, which are detrimental to the optical and mechanical properties of the fabricated waveguides, by reducing the gas velocity

Method used

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  • Optical waveguide material as well as method and device for producing it
  • Optical waveguide material as well as method and device for producing it
  • Optical waveguide material as well as method and device for producing it

Examples

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Embodiment Construction

[0033] Apparatus for producing light-enhanced optical materials includes at least a burner assembly for producing particles of erbium-doped quartz glass.

[0034] Referring to FIGS. 1 a and 1 b , the burner assembly 600 includes four tubes 11 , 21 , 31 , 41 defining four concentric nozzles 12 , 22 , 32 , 42 . The innermost nozzle, referred to herein as the liquid nozzle, is used to deliver the liquid reactant 10 . The outer surface of the tube 11 and the inner surface of the tube 21 together define an annular atomizing gas nozzle 22 from which atomizing gas 20 is discharged. The atomizing gas is accelerated by the pressure differential acting over the nozzle 22 . The velocity of the atomizing gas 20 can be further increased by a constriction 24 of the nozzle 22 . The cross-section can also be reduced by enlarging the outer surface of the liquid reactant tube 11 instead of the constriction 24 of the tube 21 . The combustor assembly 600 may also include, for example, more noz...

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Abstract

The invention relates to the production of light-amplifying optical material. Liquid reactant (10) is atomized into droplets (15) using a high velocity gas (20) . The droplets (15) are subsequently introduced into a flame (100) . Reactants (10, 30) are oxidized in the flame (100) and condensed by forming small particles (50) . At least a fraction of said particles (50) is collected and fused to form optical waveguide material, which is subsequently drawn to form an optical waveguide (750) . According to the invention, the velocity of the atomizing gas (20) stream is in the range of 0.3 to 1.5 times the velocity of sound. The high velocity enhances atomization and increases reaction rates in the flame (100) . The residence times are reduced to such a degree that unwanted phase transformations in the produced particles (50) are substantially minimized. Consequently, very homogeneous material is produced. Especially, in the production of erbium-doped silica, low percentage of clustered erbium ions is achieved.

Description

[0001] The invention relates to a process for the preparation of light-enhanced optical materials, said process comprising atomizing at least one reactant in liquid form into droplets by means of an atomizing gas, introducing said droplets and / or their gaseous products into a flame , oxidizing the at least one reactant to form one or more oxides, condensing the one or more oxides to form particles, collecting at least some of the particles, and fusing the particles together to form the Light-enhancing optical materials. The invention also relates to a device for preparing said light-enhanced optical material and an optical waveguide containing said light-enhanced optical material. Background technique [0002] The formation of small particles is an important step in the preparation of light-enhanced optical waveguides that enhance light by stimulated emission of radiation. The light-enhancing properties of these waveguides are obtained by doping, for example, amorphous silica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/014C03C13/04G02B6/02F23D11/00F23D11/10F23D11/38F23D14/32F23D14/52F23D14/70G02B6/12
CPCC03B2207/34C03B2201/36C03C3/06C03B2207/14C03B37/0142C03B2201/34C03B37/014C03C13/04C23C4/12F23D11/10Y02P40/57
Inventor K·詹卡M·拉贾拉J·蒂卡南
Owner LIEKKI OY
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