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A method for forming a polymer protective layer on the surface of a chalcogenide glass optical fiber preform

A technology of optical fiber preform and chalcogenide glass, which is applied in the field of optical fiber preparation, can solve the problems that chalcogenide glass optical fibers are prone to cracks or breaks, bubbles are introduced, and the coating quality cannot be guaranteed, so as to simplify the optical fiber coating process and improve flexibility. Sexuality, easy to absorb water

Active Publication Date: 2015-10-28
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the glass composition in the infrared chalcogenide glass special optical fiber is relatively special, and the chalcogenide glass is very brittle. During the preparation process of the chalcogenide glass optical fiber, the too fragile chalcogenide glass fiber cannot be drawn into the ordinary optical fiber coating cup (inner contains liquid coating raw materials), and the thermal expansion and contraction coefficients of chalcogenide glass and organic coating layer are difficult to match, which makes the coating of chalcogenide glass optical fiber difficult to achieve, the coating process is difficult to control, and the coating quality cannot be achieved. ensure
In addition, because the chalcogenide glass fiber is relatively brittle, if the traditional wire drawing coating method is used, it is easy to introduce impurity particles during the wire drawing coating process, and the uneven expansion or shrinkage caused by the tiny impurity particles in the coating will be in the coating and glass fiber. Bending stress occurs between them, which makes the brittle chalcogenide glass optical fiber prone to cracks or breakage during use
Another problem encountered during the coating process of chalcogenide glass fiber is that it is easy to introduce air bubbles between the interface between the chalcogenide glass fiber and the polymer coating or inside the polymer coating

Method used

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  • A method for forming a polymer protective layer on the surface of a chalcogenide glass optical fiber preform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method for forming a PSU polymer protective layer on the surface of a chalcogenide glass optical fiber preform, comprising the steps of:

[0023] (1) Cut the entire PSU polymer film into multiple strips of PSU film with a size of 30cm×10cm, and then wash off impurities on the surface with absolute ethanol.

[0024] (2) Put the strip-shaped PSU film in the step (1) into the drying box, turn on the vacuum pump to vacuumize the drying box, and wait for the vacuum degree in the drying box to reach 133 ~ 10 -2 When it is within the range of Pa, set the heating temperature of the drying oven to 100°C, and then keep it at 100°C for 15 hours to ensure that the moisture in the PSU polymer film can be removed after heating and drying. Then the temperature of the drying oven was set to 30° C., and the PSU strip film in the drying oven was gradually cooled to 30° C.

[0025] (3) After being treated in step (2), the strip-shaped polymer film of PSU after drying and de...

Embodiment 2

[0030] A preparation method for forming a PES polymer protective layer on the surface of a chalcogenide glass optical fiber preform, comprising the steps of:

[0031] (1) Cut the whole PES polymer film into strips of PES film with a size of 30cm×10cm, and then wash off impurities on the surface with absolute ethanol.

[0032] (2) Put the strip-shaped PES film in the step (1) into the drying box, turn on the vacuum pump to vacuumize the drying box, and wait until the vacuum degree in the drying box reaches 133 ~ 10 -2 When it is within the range of Pa, set the heating temperature of the drying oven to 110°C, and then keep it at 110°C for 23 hours to ensure that the moisture in the PES polymer film can be removed after heating and drying. Then the temperature of the drying oven was set to 30°C, and the PES strip film in the drying oven was gradually cooled to 30°C.

[0033] (3) After being treated in step (2), the PES strip-shaped polymer film after drying and dehydration is ta...

Embodiment 3

[0038] A preparation method for forming a PPSU polymer protective layer on the surface of a chalcogenide glass optical fiber preform, comprising the steps of:

[0039] (1) Cut the whole PPSU polymer film into strips of 30cm×10cm in size, and then wash off impurities on the surface with absolute ethanol.

[0040] (2) Put the strip-shaped PPSU film in the step (1) into the drying box, turn on the vacuum pump to vacuumize the drying box, and wait for the vacuum degree in the drying box to reach 133 ~ 10 -2 When it is within the range of Pa, set the heating temperature of the drying oven to 120°C, and then keep it at 120°C for 31 hours to ensure that the moisture in the PPSU polymer film can be removed after heating and drying. Then the temperature of the drying oven was set to 30°C, and the PPSU strip film in the drying oven was gradually cooled to 30°C.

[0041] (3) After being treated in step (2), the strip-shaped polymer film of PPSU after drying and water removal is taken ou...

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Abstract

The invention discloses a method for forming a polymer protective layer on the surface of a chalcogenide glass optical fiber preform. The method is easy to operate, has short processing period and high efficiency. A chalcogenide glass optical fiber with a polymer protective coating can be drawn by using the chalcogenide glass optical fiber prefabricated rod with a polymer protective layer processed by the invention. The new chalcogenide glass optical fiber preform processing method proposed by the present invention simplifies the optical fiber coating process in the later stage of chalcogenide glass optical fiber preparation, solves the problem that there is no suitable coating material for chalcogenide glass optical fiber in the past, and effectively removes sulfur The bubbles produced during the coating process of the chalcogenide glass optical fiber improve the coating quality of the chalcogenide glass optical fiber, thereby greatly improving the mechanical strength of the finished chalcogenide glass optical fiber and enhancing the adaptability of the chalcogenide glass optical fiber in different environments.

Description

technical field [0001] The invention belongs to the technical field of optical fiber preparation and relates to a method for coating an optical fiber protective layer, in particular to a method for forming a polymer protective layer on the surface of a chalcogenide glass optical fiber preform. Background technique [0002] In the visible light frequency band, quartz glass optical fibers are widely used in optical fiber communication systems at present, but limited by the infrared cut-off wavelength of quartz materials, the longest operating wavelength of quartz glass optical fibers is at about 2 μm, and the second transmission in the very important relatively transparent atmosphere Window (3~5μm, this wavelength range includes many important molecular characteristic lines) and the third transmission window (8~12μm) of the atmosphere, but the quartz glass fiber cannot effectively transmit the light in these infrared frequency bands. Chalcogenide glass has excellent mid- and f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C23/00
Inventor 王训四姜晨徐会娟朱敏鸣张培全戴世勋沈祥聂秋华徐铁峰
Owner NINGBO UNIV