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Treatment method of reducing hydrogen loss of optical fiber and devices in use for the method

A technology of processing equipment and processing method, which is applied in the field of reducing optical fiber hydrogen loss and the equipment used in the institute, can solve the problems of reducing wire tension, exceeding, and increasing additional loss, etc., and achieves low manufacturing cost, compact structure, and land occupation. little effect

Active Publication Date: 2005-01-12
FENGHUO COMM SCI & TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0009] This causes an increase in the additional loss after the hydrogen loss
Although the defects in the optical fiber can be reduced by optimizing the drawing process, such as lowering the drawing temperature, lowering the drawing tension, etc., the additional attenuation after hydrogen loss still exceeds the level allowed by the low water peak optical fiber standard

Method used

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  • Treatment method of reducing hydrogen loss of optical fiber and devices in use for the method
  • Treatment method of reducing hydrogen loss of optical fiber and devices in use for the method

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Embodiment Construction

[0035] Put the drawn optical fiber into the figure 1 In the shown optical fiber deuterium processing chamber 8, the pure inert gas purging equipment is passed through the inert gas inlet 3 for 15 minutes, and then the temperature in the optical fiber deuterium processing chamber is heated to 25 to 50°C, and the optimum temperature is 40°C. Subsequently, the processing chamber is evacuated, and a mixed gas of deuterium and nitrogen is introduced into the deuterium processing chamber from the deuterium gas inlet 1, wherein the concentration of deuterium is 0.5% to 3%, and the optimum deuterium concentration is 2%. Optical fiber deuterium processing The pressure of the mixed gas in the chamber is 1.01×10 5 Pa to 2.02×10 5 Pa, the optimum pressure is 1.15×10 5 Pa, maintain this state for 10 to 30 hours, and the optimal time is 20 hours, then feed the inert gas by the inert gas inlet 3 and cool the temperature in the deuterium treatment chamber to room temperature, then the gas i...

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Abstract

The main characteristic of method and device in this invention is to do deuterate process for fibre-optical formed by drawing in normal temp to reduce and remove the fault in fibre-optical thus to reduce fibre-optical hydrogen loss. The fibre-optical processed by this invention has additional less than or equal to 0.01 dB / km when hydrogen loss is 1383 nm.

Description

technical field [0001] The invention relates to a treatment method for reducing hydrogen loss of optical fibers and equipment used in the method, in particular to a deuterium treatment process for optical fibers and deuterium treatment equipment used in the process. Background technique [0002] At present, optical fiber communication technology continues to develop in the direction of high speed and large capacity. The specific technological development approaches mainly include increasing the transmission rate of a single channel and increasing the number of channels of wavelength division multiplexing (WDM). In order to increase the number of channels multiplexed by WDM, there are two ways, one is to reduce the channel spacing; the other is to expand the available frequency band of the optical fiber. Optical fiber manufacturing technology has been working hard to expand the usable frequency band of optical fiber. [0003] Since Corning Corporation of the United States m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/00C03C25/66
Inventor 雷道玉陆大方李诗愈王冬香李海清陈伟成煜严勇虎
Owner FENGHUO COMM SCI & TECH CO LTD
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