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Preparation method of composite optical fiber with optical crystal and ceramic as core materials and quartz as coating layer

An optical crystal and composite optical fiber technology, which is applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of silica diffusion and short reaction time, and achieve the effects of short reaction time, simple operation and wide application range.

Active Publication Date: 2017-03-15
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is also called the online feeding method. The key point of the present invention is that the online feeding operation is simple and convenient, and the reaction time between the core material and the quartz cladding is short during the wire drawing process, which solves the problem of serious silica diffusion in the traditional molten core method.

Method used

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  • Preparation method of composite optical fiber with optical crystal and ceramic as core materials and quartz as coating layer
  • Preparation method of composite optical fiber with optical crystal and ceramic as core materials and quartz as coating layer
  • Preparation method of composite optical fiber with optical crystal and ceramic as core materials and quartz as coating layer

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Cut and grind YAG transparent ceramics into particles with an outer diameter of about 2 mm, preferably with surface polishing, then wash with dilute hydrochloric acid and deionized water, and dry. figure 1 It is a schematic diagram of the drawing state of the optical fiber in Embodiment 1 of the present invention. Select a hollow quartz preform 1 of a quartz tube with a length of 600mm, an outer diameter of 25mm, and an inner diameter of 3.5mm. In the graphite furnace 5 of the machine; the side of the upper end is clamped on the quartz optical fiber drawing tower by the clamping fixture 9, and the upper end surface of the hollow quartz preform is leaked out. Raise the temperature of the graphite furnace until the quartz tube softens, the lower head falls, and start to draw the hollow optical fiber. When the outer diameter of the optical fiber is adjusted to 200 μm, put a YAG particle 2 into the inner hole of the upper end surface every 6 minutes, and the core material p...

Embodiment 2

[0030] Will Yb 2 o 3 Yb:YAG transparent ceramics with a doping amount of 15at.%, cut and polished into strips with a length of 2mm and an outer diameter of 0.5mm, the surface is polished, then cleaned with dilute hydrochloric acid and deionized water, and dried. One end of a thick-walled quartz tube with a length of 10 cm is reamed to form the reaming part 7, and this end is connected to another thin-walled quartz tube to form a figure 2 For the hollow preform shown, after drawing it into a hollow-core optical fiber with an outer diameter of 170 μm, raise the temperature in the furnace to 2000° C., and put a core material from the upper part of the thin-walled quartz tube 6 every 3-5 minutes. Draw Yb-doped yttrium aluminum silicon oxide core / silica cladding composite fiber. Figure 5 It is the optical fiber component distribution diagram of Embodiment 2 of the present invention.

Embodiment 3

[0032] The sapphire was cut and polished into strips with a length of 3 mm and an outer diameter of 0.2 mm, and then cleaned with deionized water and dried. A thick-walled quartz tube with a length of 50 cm is connected to another thin-walled quartz tube, and a funnel 8 is inserted in the middle to form image 3 As shown in the hollow preform, the temperature in the furnace is raised to 2200°C to draw a hollow optical fiber with an outer diameter of 80 μm, and a core material is put in from the thin-walled quartz tube 6 every 3 minutes. Drawn silica clad composite fiber with high alumina core.

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Abstract

The invention provides a preparation method of a composite optical fiber with optical crystals and ceramics as core materials and quartz as a coating layer. The preparation method includes the following steps: (1) using optical crystals and ceramics as core materials, filling the core materials in a hollow quartz perform rod inner bore, and conducting washing and then drying; (2) processing the hollow quartz perform rod, and clamping the hollow quartz perform rod to a drawing tower by a long perform rod side-surface clamping method, a hole-enlarging glass-tube-introducing method or a glass-tube-introducing funnel-adding method; (3) with the temperature in a lifting type fiber-drawing furnace higher than the fiber-drawing temperature of quartz glass and the melting point of the core materials, pouring the core materials in the hollow quartz perform rod on which drawing is being conducted, and at the same time, controlling the composite optical fiber containing the core materials. Online feeding operation is simple to conduct, the reaction time of the core materials and the coating layer is short in the fiber-drawing process, and the problem that silica diffusion is serious for a traditional core melting method is solved. The prepared optical fiber rare earth is high in doping concentration, the core materials is wide in application range, and a novel method is provided for the research and development of the composite fiber.

Description

technical field [0001] The invention relates to a functional optical fiber, in particular to a method for preparing a composite optical fiber with optical crystals and ceramics as the core material and quartz glass as the cladding. Background technique [0002] With the development of science and the needs of society, the application of optical fiber has expanded from communication to laser, sensing and other fields, and various functional optical fibers have emerged as the times require. In recent years, the rise of composite optical fiber is based on the combination of the drawing properties of glass and the functional properties of crystals and ceramic materials, giving full play to the superior performance of various materials, and drawing materials that cannot or are not suitable for drawing into optical fibers, such as crystal materials. Ceramic materials and semiconductor materials have expanded the functional characteristics and application fields of optical fiber ma...

Claims

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Application Information

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IPC IPC(8): C03B37/027C03C13/04
CPCC03B37/027C03B2201/34C03B2201/36C03C13/046
Inventor 郑书培陈丹平
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI