Sintering process for manufacturing prefabricated fiber rod
A technology of optical fiber preform and sintering method, which is applied in manufacturing tools, glass manufacturing equipment, optics, etc., and can solve problems such as uncontrollable fiber core-to-clad ratio, inability to draw optical fibers, and inability to produce qualified optical fiber master rods, etc.
Inactive Publication Date: 2005-04-20
JIANGSU FASTEN PHOTONICS
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This disordered change makes the diameter of the actual sintered finished rod exceed the pre-designed change, resulting in an uncontrollable core-to-clad ratio of the optical fiber.
Therefore, if this change is not controlled, it will not be possible to produce a qualified optical fiber parent rod, and it will not be possible to draw a qualified optical fiber.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] The design of the sintering process and the K coefficient is based on the shrinkage of the outer diameter of the loose body calculated in theory and the shrinkage of the outer diameter of the loose body after actual sintering. The K value is the shrinkage ratio coefficient and is designed. K value can be 1.2, 1.3, 1.5. Verify the design value, if there is a deviation, correct the K value, and control by changing the process conditions, that is, sintering temperature, pulling speed, atmosphere and other parameters.
[0038] The actual test results are used to verify the K value. Through multiple experiments, use the method of gradual approximation to make the test value and design value equal.
[0039] From the obtained set of K values, select an appropriate K value to complete the sintering process.
[0040] Sintering is completed in a closed container at high temperature, through the sintering temperature, furnace temperature distribution curve, traction speed, etc. ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Login to View More
Abstract
In the technological process of sintering to manufacture prefabricated fiber rod, contraction ratio coefficient K is set and controlled, so as to control the outer diameter of rod product and obtain certain core-to-coating ratio of fiber mother rod and fiber. One K value is first designed and the sintered fiber mother rod is measured in fiber rod instrument to obtain outer diameter of the fiber mother rod. After verification, the K value is corrected and the sintering process is controlled based on the improved technological conditions, including sintering temperature, drawing speed, atmosphere, etc. Through several times of experiment and by means of successive approximation method the measured value is equal to the designed value.
Description
1. Technical field [0001] The invention relates to a sintering process method for manufacturing optical fiber prefabricated rods, which is used for sintering loose bodies deposited outside the core rods of optical fiber prefabricated rods. 2. Background technology [0002] For the manufacture of optical fiber preforms, due to various factors such as cost and parameter control, the two-step method is currently more popular. That is to use long deposition time, low deposition efficiency, complex control but can accurately control the refractive index profile to produce core rods, such as MCVD, PCVD, VAD, etc., outside the core rod, the deposition efficiency is relatively high and the deposition time is short , Control the relatively simple OVD or VAD to make the outer cladding of the loose body, and through the sintering process of dehydration and vitrification, to manufacture a large optical fiber parent rod that can draw optical fibers with a long kilometer. [0003] Using ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/012G02B6/00
CPCC03B37/01446Y02P40/57
Inventor 严薇梁乐天卞进良查健江吴江孙建军
Owner JIANGSU FASTEN PHOTONICS