Method for manufacturing rare earth extended fibre-optical prefabricated bar

A fiber preform and rare earth-doped technology, which is applied in manufacturing tools, glass manufacturing equipment, optics, etc., can solve the problem of low gain flatness, limited uniformity, limited control of doping uniformity and doping concentration To achieve the effect of improving the utilization rate of raw materials, improving the uniformity of doping, and improving the indicators of optical devices
CN1289421CInactive Publication Date: 2006-12-13FENGHUO COMM SCI & TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FENGHUO COMM SCI & TECH CO LTD
Publication Date
2006-12-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process for preparing the prefabricated RE-doped optical-fibre rod features that the chemical gas-phase deposition of plasma is used to deposit the doped SiO2 layer on the inner surface of liner quartz tube and the evaporator is used to directly deliver the RE compound and other codoping agent into reaction tube for direct deposition without pollution.
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Description

technical field

[0001] The invention relates to a method for manufacturing an optical fiber preform, in particular to a method for directly depositing rare earth dopants by using a plasma chemical vapor deposition (PCVD) process to manufacture rare earth doped optical fibers. technical background

[0002] In the early 1960s, at the same time as the semiconductor light amplification phenomenon was studied, the spectral characteristics of optical fibers doped with rare earth elements were also studied. At that time, these studies were carried out in anticipation of the development of rare earth fiber laser sources. From 1985 to 1986, Payne and others at the University of Southampton in the United Kingdom effectively solved the problem of thermal quenching of erbium-doped optical fibers, developed a core-doped erbium-doped optical fiber by MCVD for the first time, and achieved a low loss window of 1.55 μm In 1987, they used a 650 dye laser as a pumping light source and obtained...

Claims

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