CN107607297A - The method for predicting optical fiber attenuation - Google Patents
The method for predicting optical fiber attenuation Download PDFInfo
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- CN107607297A CN107607297A CN201711050833.9A CN201711050833A CN107607297A CN 107607297 A CN107607297 A CN 107607297A CN 201711050833 A CN201711050833 A CN 201711050833A CN 107607297 A CN107607297 A CN 107607297A
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- optical fiber
- attenuation coefficient
- attenuation
- actual measurement
- wavelength
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Abstract
The present invention relates to a kind of method for predicting optical fiber attenuation, it is sampled from the plug for being envisaged for preparing preform carries out wire drawing, prepare the detection optical fiber comprising sandwich layer and at least part covering, it is 1310 to wavelength that detection, which obtains detection optical fiber, the actual measurement attenuation coefficient of 1383 and 1550nm light, calculate these three the actual measurement attenuation coefficient differences of actual measurement attenuation coefficient between any two, by these actual measurement attenuation coefficient differences compared with corresponding standard attenuation coefficient difference, if at least one actual measurement attenuation coefficient difference and corresponding standard attenuation coefficient difference are inconsistent, the optical fiber attenuation that then judgement is prepared using the plug is unqualified.The present invention can look-ahead go out some plugs and will prepare the underproof optical fiber of decay, so as to which unqualified plug is rejected, avoid because producing unqualified optical fiber using these plugs, and then avoid human and material resources, financial resources and the time being wasted in follow-up substandard product production, production cost is reduced, improves production efficiency.
Description
Technical field
The present invention relates to one kind before optical fiber prepares, can the whether qualified method of look-ahead optical fiber attenuation,
Belong to technical field of optical fiber detection.
Background technology
Optical fiber attenuation greatly limit the transmission range of optical fiber, be an important indicator for evaluating optical fiber property, and optical fiber is
Formed by preform drawing, the production process of wherein preform is mainly two-step method：It is the manufacture of plug first,
In the preparation process of plug, depositing operation can determine plug index distribution, relative index of refraction (△), prefabricated rods inner cladding and
The diameter ratio (b/a) of sandwich layer, sintering process are then glass densification and dehydration, are eliminated in this process as caused by water peak
1383 decay.Therefore, plug manufacturing process is the core stage of prefabricated rods manufacture, and is the crucial control process of optical fiber attenuation,
Optical fiber 1383 it will decay and be had an impact with 1310 decay made of prefabricated stick drawn wire, and or cause substandard product.
With the continuous development of optical fiber technology, increasingly by people's in terms of improving production efficiency and reducing production cost
Pay attention to, largely material and waste of time as caused by plug to optical fiber process can be caused because decay is unqualified, therefore, in light
Before fibre prepares, it is predicted that whether the decay of optical fiber qualified, for reduce material and time waste, reduce production cost,
Improving production efficiency has obvious positive role.
The content of the invention
The purpose of the present invention is the drawbacks described above for prior art, proposes a kind of method for predicting optical fiber attenuation, uses
This method can look-ahead go out some plugs and will prepare the underproof optical fiber of decay, so as to which unqualified plug is rejected,
Avoid because producing unqualified optical fiber using these plugs, and then avoid manpower, the thing being wasted in follow-up substandard product production
Power, financial resources and time, production cost is reduced, improve production efficiency.
The present invention realizes that the technical scheme of above-mentioned purpose is：A kind of method for predicting optical fiber attenuation, it is from being envisaged for preparing
The plug of preform（Including extending plug）Upper sampling carries out wire drawing, prepares the inspection comprising sandwich layer and at least part covering
Survey optical fiber, detection obtain actual measurement attenuation coefficient of the detection optical fiber to wavelength for 1310,1383 and 1550nm light, calculate this
The actual measurement attenuation coefficient difference of three kinds of actual measurement attenuation coefficients between any two, by these actual measurement attenuation coefficient differences and corresponding standard
Attenuation coefficient difference is compared, if at least one actual measurement attenuation coefficient difference differs with corresponding standard attenuation coefficient difference
Cause, then the optical fiber attenuation that judgement is prepared using the plug is unqualified.
The beneficial effects of the invention are as follows：The unqualified risk of optical fiber attenuation caused by plug reason can be estimated in advance, will
These unqualified plugs are rejected, and are not used in subsequent production, thus avoid unqualified optical fiber of decaying caused by plug factor
Follow-up each production technology, avoids and wastes these technologic human and material resources, financial resources and times, simultaneously as can be earlier
Know the related unqualified situation of plug, analyze reason in advance, take corrective measure, it also avoid continuing producing it is same not
Qualified plug.
Because the influence of additional cladding process and other factors to these three attenuation coefficients is seldom in practice, optical fiber is caused to decline
Subtract underproof factor to be concentrated mainly on plug, therefore, declined using method of the invention, it is possible to predict most optical fiber
Subtract underproof situation.
Brief description of the drawings
Fig. 1 is the flow chart of related process of the present invention.
Embodiment
Referring to Fig. 1, under prior art, being related to the production process of plug mainly includes plug deposition and plug sintering, sintering
The plug foundation of completion is actually needed progress or without extension, and the plug after extension can be described as extending plug, to extending core
Rod and the plug progress conventional detection without extension, detect preparation and prefabricated rods of the qualified plug into follow-up preform
The techniques such as wire drawing, produce fiber products.
The present invention adds the process of prediction optical fiber attenuation after existing conventional plug detection, is detected from by conventional plug
The plug for being envisaged for preparing preform（Plug including extension plug and without extension）Upper sampling carries out wire drawing, prepares
Go out the detection optical fiber comprising sandwich layer and at least part covering, it is 1310,1383 and to wavelength that detection, which obtains detection optical fiber,
The actual measurement attenuation coefficient of 1550nm light, these three the actual measurement attenuation coefficient differences of actual measurement attenuation coefficient between any two are calculated, will
These actual measurement attenuation coefficient differences are compared with corresponding standard attenuation coefficient difference, if at least one actual measurement attenuation coefficient
Difference and corresponding standard attenuation coefficient difference are inconsistent, then the optical fiber attenuation that judgement is prepared using the plug is unqualified.
The standard attenuation coefficient difference can be respectively the three of 1310,1383 and 1550nm to wavelength according to corresponding optical fiber
The attenuation coefficient characteristic value of kind light calculates, and the attenuation coefficient characteristic value is the attenuation coefficient after the extrinsic decay of elimination.For
Adulterate GeO2Single-mode fiber for, the attenuation coefficient characteristic value under 1310,1383 and 1550nm, tri- kinds of wavelength is respectively
0.33dB/Km, 0.27dB/Km and 0.185dB/Km are thus, poor corresponding to the standard attenuation coefficient of 1310nm and 1383nm wavelength
It is worth for 0.06 dB/Km, the standard attenuation coefficient difference corresponding to 1310nm and 1550nm wavelength is 0.145 dB/Km, is corresponded to
The standard attenuation coefficient difference of 1383nm and 1550nm wavelength is 0.085 dB/Km.
Empirical data can be can be combined with according to detection error and the deviation allowed, it is determined that actual measurement attenuation coefficient difference
The error range allowed between corresponding standard attenuation coefficient difference, in the difference range of permission, it is believed that both are consistent.
Beyond the error range of permission, then it is assumed that both are inconsistent.
Tool can be found out according to existing achievement in research to causing the underproof plug preparation process of optical fiber attenuation to be analyzed
Body reason simultaneously takes effective corrective measure, avoids continuing to produce same unqualified plug.
Generally, if the actual measurement attenuation coefficient difference between a certain wavelength and two other wavelength decays with respective standard
Coefficient differentials are inconsistent, and the actual measurement attenuation coefficient difference between two other wavelength and respective standard attenuation coefficient difference one
Cause, then can further speculate that decay of the optical fiber prepared to the wavelength is unqualified.In this case, can be accordingly to specific
The underproof deduction of decay of wavelength, analyze causes the underproof reason of optical fiber attenuation in plug preparation process.
Here is using the inventive method decay several specific embodiments of unqualified prediction：
Embodiment 1：
For the qualified extension plug A of conventional detection, take wherein one section directly to carry out wire drawing, detect its 1310 decay（To wavelength
For the attenuation coefficient of 1310nm light）, 1383 decay（Attenuation coefficient to wavelength for 1383nm light）And 1550 decay（It is right
Wavelength is the attenuation coefficient of 1550nm light）Respectively 0.385 dB/Km, 0.385 dB/Km and 0.3 dB/Km.It is calculated
The differences of 1310 decay and 1383 decay be that the differences of 0,1383 decay and 1550 decay be 0.085 dB/Km, 1310 decay and
The difference of 1550 decay is 0.085 dB/Km, thus speculates optical fiber of the prefabricated rods after the additional covering of the plug after wire drawing
Decay unqualified, and further speculate that its 1310 decay is unqualified.
Embodiment 2：
For the qualified extension plug B of conventional detection, take wherein one section directly to carry out wire drawing, detect its 1310 decay, 1383 decline
Subtract and 1550 decay are respectively 0.45 dB/Km, 0.45 dB/Km and 0.305 dB/Km.1310 decay and 1383 are calculated
Decay difference is 0,1383 decay and 1550 decay differences are 0.145 dB/Km, and 1310 decay are with 1550 decay differences
0.145 dB/Km, thus speculate that the decay of optical fiber of the prefabricated rods after the additional covering of the plug after wire drawing is unqualified, go forward side by side one
Step speculates that its 1383 decay is unqualified.
Embodiment 3：
For the qualified extension plug C of conventional detection, take wherein one section directly to carry out wire drawing, detect its 1310 decay, 1383 decline
Subtract and 1550 decay are respectively 0.47 dB/Km, 0.41 dB/Km and 0.275 dB/Km, 310 decay and 1383 are calculated
Decay difference is 0.06 dB/Km, and 1383 decay are 0.135 dB/Km, 1310 decay and 1550 decay with 1550 decay differences
Difference is 0.195 dB/Km, thus speculates that the decay of optical fiber of the prefabricated rods after the additional covering of the plug after wire drawing is unqualified,
And further speculate that its 1550 decay is unqualified.
It is disclosed by the invention it is each preferably with optional technological means, unless otherwise indicated and one preferably or can selecting technology hand
Section is outside the further restriction of another technological means, can form some different technical schemes in any combination.
Claims (5)
1. a kind of method for predicting optical fiber attenuation, it is sampled from the plug for being envisaged for preparing preform carries out wire drawing, system
For the detection optical fiber comprising sandwich layer and at least part covering is gone out, it is 1310,1383 and to wavelength that detection, which obtains detection optical fiber,
The actual measurement attenuation coefficient of 1550nm light, these three the actual measurement attenuation coefficient differences of actual measurement attenuation coefficient between any two are calculated, will
These actual measurement attenuation coefficient differences are compared with corresponding standard attenuation coefficient difference, if at least one actual measurement attenuation coefficient
Difference and corresponding standard attenuation coefficient difference are inconsistent, then the optical fiber attenuation that judgement is prepared using the plug is unqualified.
2. the method for prediction optical fiber attenuation as claimed in claim 1, it is characterised in that when a certain wavelength and two other wavelength
Between actual measurement attenuation coefficient difference it is inconsistent with respective standard attenuation coefficient difference, and the actual measurement between two other wavelength
Attenuation coefficient difference is consistent with respective standard attenuation coefficient difference, then further speculates decay of the optical fiber prepared to the wavelength
It is unqualified.
3. the method for prediction optical fiber attenuation as claimed in claim 2, the underproof deduction of the decay to specific wavelength accordingly, point
Analysis causes the underproof reason of optical fiber attenuation in plug preparation process.
4. the method for the prediction optical fiber attenuation as described in claim 1,2 or 3, it is characterised in that the standard attenuation coefficient difference
It is respectively the attenuation coefficient characteristic value calculating of 1310,1383 and 1550nm three kinds of light to wavelength according to corresponding optical fiber, it is described to decline
Subtract coefficient characteristics value to eliminate the attenuation coefficient after extrinsic decay.
5. as claimed in claim 4 prediction optical fiber attenuation method, it is characterised in that for adulterate GeO2 single-mode fiber and
Speech, the standard attenuation coefficient difference corresponding to 1310nm and 1383nm wavelength be 0.06 dB/Km, corresponding to 1310nm with
The standard attenuation coefficient difference of 1550nm wavelength is 0.145 dB/Km, is decayed corresponding to the standard of 1383nm and 1550nm wavelength
Coefficient differentials are 0.085 dB/Km.
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| CN201711050833.9A CN107607297B (en) | 2017-10-31 | 2017-10-31 | The method for predicting optical fiber attenuation |
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| CN201711050833.9A CN107607297B (en) | 2017-10-31 | 2017-10-31 | The method for predicting optical fiber attenuation |
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| CN107607297B CN107607297B (en) | 2019-07-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101066834A (en) * | 2007-05-28 | 2007-11-07 | 江苏法尔胜光子有限公司 | Process of preparing fiber preformrod |
| CN101213149A (en) * | 2006-03-06 | 2008-07-02 | 斯德莱特光学技术有限公司 | Apparatus and method for fabricating optical fiber preform |
| CN103175708A (en) * | 2013-04-11 | 2013-06-26 | 中国特种设备检测研究院 | Elevator descending testing system |
| US20170129800A1 (en) * | 2014-07-09 | 2017-05-11 | Cornng Incorporated | Method of making optical fibers in a reducing atmosphere |
-
2017
- 2017-10-31 CN CN201711050833.9A patent/CN107607297B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101213149A (en) * | 2006-03-06 | 2008-07-02 | 斯德莱特光学技术有限公司 | Apparatus and method for fabricating optical fiber preform |
| CN101066834A (en) * | 2007-05-28 | 2007-11-07 | 江苏法尔胜光子有限公司 | Process of preparing fiber preformrod |
| CN103175708A (en) * | 2013-04-11 | 2013-06-26 | 中国特种设备检测研究院 | Elevator descending testing system |
| US20170129800A1 (en) * | 2014-07-09 | 2017-05-11 | Cornng Incorporated | Method of making optical fibers in a reducing atmosphere |
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| CN107607297B (en) | 2019-07-19 |
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