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Method for preparing multihole infrared chalcogenide glass photonic crystal optical fiber preform

A photonic crystal fiber, chalcogenide glass technology, applied in glass manufacturing equipment, glass fiber products, manufacturing tools, etc., can solve problems such as interface defects, difficult to accurately arrange capillaries, and interface bubbles.

Active Publication Date: 2013-04-03
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the stacking method for preparing photonic crystal fiber preforms are: (1) During the stacking process, it is difficult to arrange the capillaries precisely as required; (2) Due to the air gap between the capillaries, the air remains between the capillary and the capillary interface during the shrinking process, resulting in There are bubble defects, and there are obvious interface defects between the capillary and capillary interfaces
The disadvantages of preparing photonic crystal fiber preforms by casting method are: (1) The air hole arrangement accuracy of photonic crystal fiber preforms prepared by casting method is affected by the arrangement accuracy of quartz capillary hollow rods, and it is difficult for quartz capillary hollow rods to meet the accuracy requirements; (2 ) Production of chalcogenide glass photonic crystal fiber preforms by casting

Method used

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  • Method for preparing multihole infrared chalcogenide glass photonic crystal optical fiber preform

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1: A method for preparing a porous infrared chalcogenide glass photonic crystal optical fiber preform, comprising the following steps:

[0015] 1) Accurately weigh chalcogenide glass raw materials with a purity level of 5N and put them into a quartz tube. The length of the quartz tube is 400 mm, and the diameter of the quartz tube is 20 mm. Vacuumize the quartz tube containing the chalcogenide glass raw materials processing, the vacuum degree reaches 3′10 -4 After pa, the quartz tube was sealed with a hydrogen-oxygen flame; the sealed quartz tube containing the chalcogenide glass raw material was put into a swing furnace at 900°C for 6 hours, and the temperature of the swing furnace dropped to After 650°C, the quartz tube was taken out from the swing furnace, and the temperature of the quartz tube was quenched with compressed air until the surface of the glass melt was separated from the inner wall of the quartz tube, and the quartz tube was immediately place...

Embodiment 2

[0019] Embodiment 2: A method for preparing a porous infrared chalcogenide glass photonic crystal optical fiber preform, which is characterized in that it includes the following steps:

[0020] 1) Accurately weigh chalcogenide glass raw materials with a purity level of 5N and put them into a quartz tube. The length of the quartz tube is 800mm, and the diameter of the quartz tube is 50mm. Vacuumize the quartz tube containing the chalcogenide glass raw materials processing, vacuum up to 6′10 -4 After pa, the quartz tube was sealed with a hydrogen-oxygen flame; the sealed quartz tube containing the chalcogenide glass raw material was put into a swing furnace at 950°C for 8 hours, and the temperature of the swing furnace dropped to After 700°C, the quartz tube was taken out of the swing furnace, and the temperature of the quartz tube was quenched with compressed air until the surface of the glass melt was separated from the inner wall of the quartz tube, and the quartz tube was i...

Embodiment 3

[0025] Embodiment 3: A method for preparing a porous infrared chalcogenide glass photonic crystal optical fiber preform, comprising the following steps:

[0026] 1) Accurately weigh chalcogenide glass raw materials with a purity level of 5N and put them into a quartz tube. The length of the quartz tube is 600mm, and the diameter of the quartz tube is 35mm. Vacuumize the quartz tube containing the chalcogenide glass raw materials processing, vacuum up to 5′10 -4 After pa, the quartz tube was sealed with a hydrogen-oxygen flame; the sealed quartz tube containing the chalcogenide glass raw material was put into a swing melting furnace at 925°C for 7 hours, and the temperature of the swing furnace dropped to After 680°C, take the quartz tube out of the swing furnace, and use compressed air to quench the temperature of the quartz tube until the surface of the glass melt separates from the inner wall of the quartz tube. Keep warm in the furnace for 5 hours, the temperature of the p...

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Abstract

The invention discloses a method for preparing a multihole infrared chalcogenide glass photonic crystal optical fiber preform. According to the method, a high-precision optical two-dimensional positioning platform is adopted for fixing a glass bar for mechanical drilling, various series of air holes can be accurately drilled, and the defect of inaccurate arrangement of the air holes by a stacking and drawing method and a casting method is solved. By utilizing the method, a diamond twist drill is adopted in the drilling process, a glass material is cut by a sharp spiral knife-edge in the high-speed revolution process, an efficient cooling system is adopted in the drilling process, heat generated in the drilling process is efficiently taken away by constantly flowing cooling liquid, and heat of the photonic crystal optical fiber preform in the drilling process is conveniently dissipated. Based on the reasons, the method is suitable for preparing the chalcogenide glass photonic crystal optical fiber preform with high expansion factors. By utilizing the method, the problem of embrittlement due to too large expansion coefficient difference between chalcogenide glass and a quartz tube in the casting method is solved.

Description

technical field [0001] The invention relates to a method for preparing a photonic crystal optical fiber preform, in particular to a method for preparing a porous infrared chalcogenide glass photonic crystal optical fiber preform. Background technique [0002] Photonic crystal fiber (PCF, also known as microstructured fiber or holey fiber) is a new type of optical fiber composed of different arrangements of air holes running through the entire fiber in the fiber cladding. This special structure of the cladding makes it compatible with Compared with the traditional structural fiber, it has some unique optical characteristics, such as unlimited single mode, controllable dispersion, high birefringence, high nonlinearity, large mode field, etc. Compared with quartz glass, chalcogenide glass has higher refractive index (2.0-3.5), extremely low phonon energy (less than 350cm -1 ), excellent mid-to-far infrared transmission performance, and a wide range of adjustable components. I...

Claims

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Application Information

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IPC IPC(8): C03B37/014
CPCC03B2201/86C03B2203/14C03B37/01208C03B37/01231C03B2203/42
Inventor 戴世勋易昌申刘永兴张培晴张培全徐铁峰聂秋华张巍
Owner NINGBO UNIV
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