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Boron-doped stress bar for manufacturing polarization-preserving fiber and manufacturing method for boron-doped stress bar

A polarization-maintaining optical fiber and stress rod technology, applied in the field of boron-doped stress rods, can solve the problems of uneven stress distribution of optical fibers, easy occurrence of panda eyes, low doping concentration, etc., so as to improve fusion splicing efficiency, improve raw material utilization, and improve Effect of Doping Concentration

Active Publication Date: 2012-07-04
RUIGUANG TELECOMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The technical problem to be solved by the present invention is to solve the problems of low doping concentration in the stress region of the panda polarization maintaining fiber, or uneven stress distribution in the fiber, panda eyes and cladding fragmentation that are prone to occur when the fiber is cut

Method used

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  • Boron-doped stress bar for manufacturing polarization-preserving fiber and manufacturing method for boron-doped stress bar
  • Boron-doped stress bar for manufacturing polarization-preserving fiber and manufacturing method for boron-doped stress bar
  • Boron-doped stress bar for manufacturing polarization-preserving fiber and manufacturing method for boron-doped stress bar

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Experimental program
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Effect test

Embodiment 1

[0045] Put the cleaned pure quartz liner in the microwave resonant cavity holding furnace, set the high frequency power of the microwave resonant cavity holding furnace to 4.5KW, the temperature in the furnace is 1030-1200°C, and put the pure quartz liner in the microwave resonant cavity Inside, it rotates periodically at a speed of 30 revolutions per minute, and the microwave cavity reciprocates axially relative to the pure quartz liner.

[0046] The mixed gas of silicon tetrachloride, high-purity oxygen and boron trichloride is introduced from one end of the pure quartz liner, wherein the flow of silicon tetraoxide vapor is 700 sccm, the flow of high-purity oxygen is 1750 sccm, and the flow of boron trichloride gas The flow rate is 70sccm ~ 1100sccm, the other end of the pure quartz liner is the discharge end of the mixed gas, and the discharge end is connected to a vacuum pump.

[0047] The pressure inside the pure quartz liner is controlled to be 15mBar, the deposition rat...

Embodiment 2

[0053] The difference between embodiment 2 and embodiment 1 is:

[0054] (1) The temperature inside the microwave resonant cavity holding furnace is 1200°C, and the high-frequency power of the microwave resonant cavity is 18.5KW;

[0055] (2) In the mixed gas, the silicon tetraoxide vapor flow rate is 1900 sccm, the high-purity oxygen flow rate is 3800 sccm, and the boron trichloride flow rate is 900 sccm-1100 sccm;

[0056] (3) The pressure inside the liner is controlled at 15mBar, the deposition rate in the liner is 6.5g / min, the molar ratio of high-purity oxygen to silicon tetroxide is controlled at 2.0, and the ratio of boron trichloride to silicon tetrachloride during the PCVD process deposition The molar ratio is adjusted as the thickness of the deposited layer increases, and the adjustment ratio is controlled at 0.47-0.58;

[0057] (4) When melting and shrinking, the pressure inside the tube is 101375Pa, and the melting temperature is 1900°C. The key indicators of the ...

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Abstract

The invention discloses a boron-doped stress bar for manufacturing a polarization-preserving fiber and a manufacturing method for the boron-doped stress bar. The manufacturing method comprises the following steps of: A10, depositing a boron doping area on the inner wall of a quartz liner tube by using a plasma chemistry vapor deposition (PCVD) process to obtain a prefabricated member, namely introducing mixed gas into one end of the quartz liner tube, and discharging the mixed gas through the other end of the quartz liner tube, wherein the mixed gas comprises silicon tetrachloride vapor with the flow of 700-1,900sccm, high-purity oxygen with the flow of 1,600-5,000sccm and boron chloride with the flow of 70-1,100sccm; and A20, performing high temperature collapsar on the deposited prefabricated member into a solid boron-doped stress bar. BCl3 and SiCl4 are used as raw materials, the boron doping area is deposited at high speed and high efficiency by the PCVD process, and the utilization rate of the raw materials and the doping concentration are improved; and moreover, gradient doping is adopted, so that the problem that the boron stress bar is easily broken and twisted in the processing can be solved, the geometric symmetry of the doping area is improved, the probability of panda eye and cladding breakage in the cutting is reduced, and the welding efficiency of the fiber is improved.

Description

technical field [0001] The invention relates to a boron-doped stress rod, in particular to a boron-doped stress rod for manufacturing polarization-maintaining optical fibers and a manufacturing method thereof. Background technique [0002] Optical fiber gyroscope is a new type of sensor that uses optical fiber sensing technology to measure the rate of inertial rotation in space. It has developed into a new mainstream instrument with epoch-making characteristics in the field of inertial technology. , with higher precision, and low cost, small size and light weight. It is not only used for the navigation of aircraft and ships, missile guidance, and high-precision position control of spacecraft, but also can be used in the guidance of high-end cars for civilian use, as well as robots and automatic control systems. The polarization-maintaining fiber is the sensing core of the fiber optic gyroscope, and the most commonly used one is the Panda stress-type polarization-maintaining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/018
CPCC03B2203/31C03B2201/10C03B37/01823
Inventor 莫琦李诗愈陈伟柯一礼但融顾学武
Owner RUIGUANG TELECOMM TECH CO LTD
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