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A kind of preparation method of chalcogenide glass optical fiber

A chalcogenide glass and optical fiber technology, applied in glass manufacturing equipment, glass production, manufacturing tools, etc., can solve the problems of low thermal stability of chalcogenide glass, high optical fiber devitrification loss, limited capacity of glass material, etc., and achieve concentricity High, low fiber loss, high production efficiency

Active Publication Date: 2017-07-07
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively low thermal stability of chalcogenide glass, the two heating processes in the secondary tube rod drawing can easily cause high loss or devitrification of the optical fiber due to crystallization. At the same time, due to the very large vapor pressure of the chalcogenide glass itself The capacity of the glass frit in the quartz tube is limited, and the chalcogenide glass itself has a very large thermal expansion coefficient. Combining these two points, the vacuum sealing and rotating method can only prepare cladding sleeves with large apertures, and cannot prepare cladding sleeves with small duty ratios. Tube
Other common methods (MCVD, PCVD, OVD, VAD, etc.) suitable for the preparation of silica optical fiber preforms are not suitable for chalcogenide glasses that generally have high refractive index, low melting point, and high expansion coefficient

Method used

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  • A kind of preparation method of chalcogenide glass optical fiber
  • A kind of preparation method of chalcogenide glass optical fiber
  • A kind of preparation method of chalcogenide glass optical fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for preparing a chalcogenide glass optical fiber, specifically comprising the following steps:

[0028] (1) Preparation of core layer and cladding glass

[0029] A. The cladding chalcogenide glass raw material and the core layer chalcogenide glass raw material are accurately weighed and put into quartz tubes respectively, and the two quartz tubes are vacuumed separately, and the vacuum degree reaches 3×10 -4 After pa, the quartz tube was sealed with a hydrogen-oxygen flame; the sealed quartz tube was placed in a swing furnace at 900°C for 8 hours, and the temperature of the swing furnace was lowered to 650°C. Take it out from the swing furnace for quenching and cooling until the surface of the glass melt is separated from the inner wall of the quartz tube; the length of the quartz tube is 400mm, the diameter of the quartz tube for placing the cladding chalcogenide glass raw material is 30mm, and the diameter of the quartz tube for placing the core layer chalco...

Embodiment 2

[0039] With above-mentioned embodiment 1, its difference is:

[0040] Step (1) During the preparation of the core layer and cladding glass: the vacuum degree of the quartz tube is controlled to 6×10 -4 pa; put the sealed quartz tube into a swinging furnace at 950°C for 6 hours, and then take the quartz tube out of the swinging furnace to quench the temperature after the temperature of the swinging furnace drops to 700°C; The melt is immediately placed in a precision annealing furnace at 30°C lower than the cladding glass transition temperature (Tg) for 6 hours, and then cooled down to room temperature at a rate of 5°C / h; Glass transition temperature (Tg) 30 ℃ precision annealing furnace keep warm for 6 hours and then drop to room temperature at a cooling rate of 5 ℃ / h; the length of the quartz tube is 800 mm, and the diameter of the quartz tube for placing the clad chalcogenide glass raw material is 40 mm. The diameter of the quartz tube for placing the core chalcogenide glas...

Embodiment 3

[0046] With above-mentioned embodiment 1, its difference is:

[0047] Step (1) During the preparation of the core layer and cladding glass: the vacuum degree of the quartz tube is controlled to 4.5×10 -4 pa; put the sealed quartz tube into a swing furnace at 925°C for 7 hours, and then take out the quartz tube from the swing furnace to quench the temperature after the temperature of the swing furnace drops to 675°C; The melt is immediately placed in a precision annealing furnace at 20°C lower than the cladding glass transition temperature (Tg) for 5 hours, and then cooled down to room temperature at a rate of 7.5°C / h; Glass transition temperature (Tg) 20 ℃ precision annealing furnace keep warm for 5 hours and then drop to room temperature at a cooling rate of 7.5 ℃ / h; the length of the quartz tube is 600 mm, and the diameter of the quartz tube for placing the clad chalcogenide glass raw material is 50 mm. The diameter of the quartz tube for placing the core layer chalcogenide...

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Abstract

The invention discloses a preparation method of a chalcogenide glass optical fiber, which is characterized in that it comprises the steps of preparing a core layer and a cladding glass by adopting an infrared chalcogenide glass system and using a vacuum swing melting quenching method; Holes are drilled on the two-dimensional precision optical displacement stage, followed by annealing, polishing, cleaning and drying in order to obtain a glass-clad casing with a smooth inner hole; finally, the core glass rod is prepared by a drawing tower to prepare a glass core rod, and the The glass core rod is inserted into the glass-clad sleeve, and the chalcogenide glass optical fiber with a core-clad structure is made by drawing a tower. The advantage is that the core-clad ratio of the prepared optical fiber is controllable, the core-clad interface is tightly contacted, and there are no defects such as bubbles. , High core-cladding concentricity, low optical loss.

Description

technical field [0001] The invention relates to the technical field of preparation of special optical fibers, in particular to a method for preparing chalcogenide glass optical fibers. Background technique [0002] The development of optical fiber preparation technology has had a profound impact on social development and people's lives; among them, the application of passive optical fiber in optical communication has revolutionized communication technology, from high energy consumption and low bandwidth cables to low power consumption Long-distance and large-capacity optical fiber communication; active optical fiber ended the dominance of solid-state lasers in the laser field, and met the requirements of high stability and low power in the fields of communication, medical treatment, and sensing to industrial production cutting, welding, and military fields. high power requirements. With the advent of the big data era, communication systems require higher bandwidth, and lase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/027
CPCY02P40/57
Inventor 刘自军王训四戴世勋卞俊轶张培全徐铁峰沈祥祝清德
Owner NINGBO UNIV
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