CN202836923U - Non-destructive testing device for transmission loss of plastic optical fibre - Google Patents
Non-destructive testing device for transmission loss of plastic optical fibre Download PDFInfo
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- CN202836923U CN202836923U CN 201220153761 CN201220153761U CN202836923U CN 202836923 U CN202836923 U CN 202836923U CN 201220153761 CN201220153761 CN 201220153761 CN 201220153761 U CN201220153761 U CN 201220153761U CN 202836923 U CN202836923 U CN 202836923U
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Abstract
The utility model provides a non-destructive testing device for transmission loss of a plastic optical fibre, mainly solving the problems that a conventional testing device can only detect by cutting off the plastic optical fibre, and the transmission loss of the plastic optical fibre cannot be subjected to online detection. The non-destructive testing device for transmission loss of the plastic optical fibre comprises a light source for emitting a light signal into the tested plastic optical fibre, and a light injection module, a light extraction module and a data collecting device which are sequentially arranged along the light transmission direction of the emergent light of the light source, wherein the data collecting device is used for recording optical power of the radiated plastic optical fibre. The device does not generate any damage or injury to the optical fibre in the processes of injecting light and extracting light without cutting off the optical fibre, thereby achieving non-destructive measurement.
Description
Technical field
The present invention relates to a kind of plastic optical fiber loss the cannot-harm-detection device, can realize the Non-Destructive Testing of plastic optical fiber loss, simultaneously, also can directly be applied on the material OpticaI Fibre Pred uction Line, realize the online Non-Destructive Testing to the plastic optical fiber loss.
Background technology
The Transmission loss of plastic optical fiber is the important parameter of weighing the plastic optical fiber quality, yet at present few to its means of measuring.Described in document " discussion of Attenuation Measuring Methods For Plastic Optical Fiber ", main measuring method has three kinds now: intercept method, insertion loss method and back scattering method.A kind of surveying instrument based on intercept method (the FibKey WF6803 of the sensible company of Beijing Wan Feng) is wherein arranged on the market, but all can not being applied to, above method carries out the Real-time Measuring amount on the production line, but the fiber products of producing is blocked sampling, then inject and the extraction luminous energy in the cross section of sample optical fiber, by processing the Transmission loss that injects with the luminous power information acquisition optical fiber that extracts.Its shortcoming is: one, carry out sampled measurements by the one section sample that extracts in the product optical fiber, can not realize on-line measurement, can't in time obtain the optical fiber quality information on the production line, real-time is very poor; Two, because be sampled measurements, so need to drop into the part manpower, also to excise a large amount of sample optical fiber, caused the waste of human and material resources; Three, by measuring the loss factor of sample, loss information, accuracy and the poor reliability of demarcating all over products.
On the other hand, traditional silica fibre loss on-line measurement system also can't copy on the plastic optical fiber production line, such as patent of invention " the Method for using on line optic fiber loss monitor(patent No.: US4; 081; 258) " following scheme is proposed: inject light signal at preform one end that is fixed on the wire-drawer-tower, extract light signal at the fiber products receiving end, obtain optical fibre transmission loss factor by processing the light signal that injects with extracting.But this scheme can't be applied on the plastic optical fiber production line because the silica fibre loss is extremely low, light in fibre core, transmit in addition tens of km after, still can extract the light signal of sufficient intensity at the product receiving end; Yet the plastic optical fiber loss is very big, injects light signal at the extruder place, along with fiber products is expressed into (such as 200m) behind the certain-length, can't detect the light signal of sufficient intensity at the product receiving end.To sum up, there is not in the market a kind of plastic optical fiber loss real-time detection apparatus that can be applied on the production line.
Summary of the invention
The invention provides a kind of plastic optical fiber loss the cannot-harm-detection device, mainly solved existing pick-up unit and must block plastic optical fiber and could detect, and the problem that can't detect online the plastic optical fiber loss.
Concrete technical solution of the present invention is as follows:
This plastic optical fiber loss the cannot-harm-detection device, comprise the light source of light signal being injected tested plastic optical fiber, be disposed with light beam along the optical transmission direction of light source emergent light and enter module, light extraction module and be used for the data collector that record gives off the plastic optical fiber luminous power; Described light beam enters the Refractive Index of Material of module and light extraction module should be more than or equal to the refractive index of plastic optical fiber covering, and two modules are all so that optical fiber is fixed and crooked with suitable radius-of-curvature, and light beam enters fiber lengths between module and the light extraction module greater than 20m.
Between described smooth extraction module and the harvester light converging device is set, is used for converging the light beam that carries luminous energy information that those give off optical fiber.
Described light source and light beam enter to be provided with light collimating device between the module.
Described light beam enters module and comprises index matching piece and fibre-optical bending clamper, is filled with index-matching fluid in the index matching piece.Described index matching medium is sucrose solution, acrylic acid, glycerine, epoxy resin etc.The material of described index matching piece is acryl resin, PMMA, polystyrene etc.
Described smooth extraction module comprises index matching piece and fibre-optical bending clamper, is filled with index-matching fluid in the index matching piece.Described index matching medium is sucrose solution, acrylic acid, glycerine, epoxy resin etc.The material of described index matching piece is acryl resin, PMMA, polystyrene etc.
Described laser instrument is the 650nm long wavelength laser.
This plastic optical fiber loss the cannot-harm-detection device, comprise the optical fiber drawing apparatus for preparing tested plastic optical fiber, light signal injected the light source of tested plastic optical fiber, set gradually along the optical transmission direction of light source emergent light and be useful on the tested plastic optical fiber light beam of stationary curved and enter module, light extraction module and be used for the data collector that record gives off the plastic optical fiber luminous power; Described light beam enters the refractive index of medium in module and the light extraction module more than or equal to the refractive index of plastic optical fiber covering, and light beam enters fiber lengths between module and the light extraction module greater than 20m.
Be provided be used to the light converging device that converges the emergent light that gives off optical fiber between described smooth extraction module and the data collector.
Described light source and light beam enter to be provided with light collimating device between the module.
Described light beam enters module and comprises index matching piece and fibre-optical bending clamper, is filled with index-matching fluid in the index matching piece.Described index matching medium is sucrose solution, acrylic acid, glycerine, epoxy resin etc.The material of described index matching piece is acryl resin, PMMA, polystyrene etc.
Described smooth extraction module comprises index matching piece and fibre-optical bending clamper, is filled with index-matching fluid in the index matching piece.Described index matching medium is sucrose solution, acrylic acid, glycerine, epoxy resin etc.The material of described index matching piece is acryl resin, PMMA, polystyrene etc.
Described optical fiber drawing apparatus and light beam enter to be provided with the fiber storage device between the module, are used for the plastic optical fiber that interim storage measuring process is produced.
Described laser instrument is take the 650nm long wavelength laser as good.
Advantage of the present invention is:
1, this plastic optical fiber loss pick-up unit, optical fiber two Nodes that mainly enter module and light extraction module any one section suitable length on production line by the light beam that is made of index matching piece, index-matching fluid, fibre-optical bending clamper three realize that respectively light signal injects and light signal extracts, the luminous power information acquisition optical fibre transmission loss factor that detects by processing, and then the Transmission loss on the realization production line measures in real time, realizes round-the-clock on-line monitoring production run.
2, the core of this plastic optical fiber loss pick-up unit is that the light beam that has proposed a kind of novelty enters and the light extracting method, has namely proposed the scheme that a kind of new-type light beam enters module and light extraction module.Light beam enters module and the light extraction module all makes fibre-optical bending, and the optical fiber integrally in knee or its part surface are immersed in the high refractive index medium environment.Injection and the extraction of light signal are realized in the surface of the fibre-optical bending part in being immersed in the high refractive index medium environment.This device need not to block optical fiber, light beam enter with light extraction process in can not produce any damage, damage to optical fiber, thereby can realize noninvasive measurement.
3, new-type light beam mentioned above enters with the coupling efficiency of light extracting method higher, theoretical modeling shows, light beam ingress place luminous energy is coupled to fiber core and light extract Nodes with fibre core in the coupling efficiency that is coupled to outside the fibre cladding of luminous energy all can reach more than 50%.
4, light beam mentioned above enters method and light extracting method, and its project organization is simple, and is not high to environmental requirement, and preferably stability and reliability are arranged.
Description of drawings
Fig. 1 is plastic optical fiber loss detection system schematic diagram;
Fig. 2 is the three-dimensional structure line frame graph that injects (extraction) module;
Fig. 3 enters energy distribution with the light beam that related software carries out emulation;
Fig. 4 integrates the three-dimensional structure line frame graph that injects with extraction module.
Wherein: the 1-laser instrument; 2-optical alignment and contracting beam system; The 3-light beam enters module; 4-part optical fiber to be measured; 5-light extraction module; 6-light collecting system; The 7-photodetector; 8-fibre-optical drawing system; Fiber storage frame of 9-; The 10-signal amplifier; The 11-data are processed and control system.
Embodiment
Principle of the present invention is as follows:
Two Nodes of any one section suitable length plastic optical fiber on the production line of continuous operation, inject efficiently respectively and extract luminous energy, and the luminous power information that ensures sufficient intensity can be detected by light power meter the Transmission loss of the luminous power information acquisition optical fiber that utilization extracts.Simultaneously, this scheme luminous energy that fibre cladding is outer is coupled to fiber core via fibre cladding, afterwards the light signal in the fibre core is extracted optical fiber by covering, needn't block optical fiber in the whole measuring process, just can not damage yet, damage plastic optical fiber, thereby realize harmless, real-time, the on-line measurement of fiber transmission attenuation.
Below in conjunction with concrete technical scheme the present invention is described in detail:
This plastic optical fiber loss the cannot-harm-detection device, comprise the light source of light signal being injected tested plastic optical fiber, be disposed with light beam along the optical transmission direction of light source emergent light and enter module, light extraction module and be used for the data collector that record gives off the plastic optical fiber luminous power; Light beam enters the refractive index of material in module and the light extraction module should be more than or equal to the refractive index of plastic optical fiber covering, and two modules are all so that optical fiber is fixed and crooked with suitable radius-of-curvature.
Light beam enters fiber lengths between module and the light extraction module greater than 20m, because the long luminous power that can't in leaching process, obtain sufficient intensity of length, thereby will cause the light field pattern optical power distribution in the fibre core unstable and fiber lengths is too short, generally take greater than 20m as good.
Light beam enters module and is comprised of index matching piece, index-matching fluid, fibre-optical bending clamper.Wherein the refractive index of index matching piece and index-matching fluid requires more than or equal to the fibre cladding Refractive Index of Material, and they are transparent materials, in addition, require index-matching fluid and plastic optical fiber that chemical reaction does not occur, do not change the plastic optical fiber attribute, do not corrode plastic optical fiber.By index-matching fluid and index matching piece, whole or its part surface of fibre-optical bending part can be immersed in the high index of refraction environment.Fibre-optical bending clamper and index matching piece are used in conjunction with, and the two is the optical fiber fixed clamp, and so that plastic optical fiber with the certain curvature radius bend.
It is similar that light extraction module and light beam enter module, and the two all makes fibre-optical bending, and whole or its part surface of fibre-optical bending part is immersed in the high refractive index medium environment.In the described surface that is immersed in the fibre-optical bending part in the high refractive index medium environment, realize injection and the extraction of light signal.
Index-matching fluid is sucrose solution, acrylic acid, glycerine, epoxy resin etc.The material of index matching piece is acryl resin, PMMA, polystyrene etc.
When the plastic optical fiber loss on the needs measurement production line, first the testing fiber of one section definite length on the production line is fixed, this length has requirement, the optical fiber of producing in the whole measuring process is temporary to the interim storage element of optical fiber first, measures to import product reception reel after complete again.
During measurement, the fibre-optical bending clamper drives testing fiber and clings on the index matching piece, so that fibre-optical bending.This moment, the index-matching fluid filling system imported index-matching fluid in the space between index matching piece and the plastic optical fiber.Afterwards, the laser of 650nm laser instrument output passes through passing through a collimating system, exporting a branch of directional light or quasi-parallel illumination is mapped on the index matching piece, after light beam passes through index matching piece, index-matching fluid, be injected in the fiber core by fibre cladding at the fibre-optical bending place, because most of light satisfies total internal reflection condition, in fibre core, form stable fibre core pattern, this has just finished the injection of luminous energy.Theoretical modeling the fiber core cross section optical power distribution (such as Fig. 3) at 10cm place after the light beam ingress, actual injecting power has reached more than 50% of incident optical power.
When light signal transmits certain distance L (unit: m) in testing fiber, extracting Nodes by fibre-optical bending clamper, index matching piece and index-matching fluid, with fibre-optical bending, and the optical fiber integrally in knee or its part surface are immersed in the high refractive index medium environment, and concrete grammar and light beam enter module class seemingly.At this moment, have a large amount of luminous energies in the knee of optical fiber and give off optical fiber by fibre cladding, and be transferred in the outside air by the index matching piece, on light beam plus lens group this part energy centralization being popped one's head in to light power meter, record luminous power P this moment
1After for the first time power measurement finishes, with the light extraction module along optical fiber backward mobile Δ L (unit: m), the luminous power P that repeats measuring process for the first time and obtain extracting
2By the fiber lengths interval delta L of twice optical power value and twice measurement correspondence can obtain optical fibre transmission loss factor α (unit: dB/m):
Fig. 4 has provided and has integrated the three-dimensional structure line frame graph that light beam enters module and light extraction module.Under the simple case of not considering fiber transmission attenuation, theoretical modeling the optical transmission process of structure shown in Figure 4, obtained up to the utilization ratio of optical energy more than 25%, show that the method can satisfy the requirement that the plastic optical fiber Transmission loss is measured fully.
Claims (10)
1. plastic optical fiber loss the cannot-harm-detection device, comprise the light source of light signal being injected tested plastic optical fiber, it is characterized in that: the optical transmission direction along the light source emergent light is disposed with the data collector that light beam enters module, light extraction module and gives off the plastic optical fiber luminous power for record; Described light beam enters the refractive index of dielectric material in module and the light extraction module should be more than or equal to the refractive index of plastic optical fiber covering, two modules are all so that optical fiber is fixed and crooked with suitable radius-of-curvature, and light beam enters fiber lengths between module and the light extraction module greater than 20m.
2. plastic optical fiber loss the cannot-harm-detection device according to claim 1, it is characterized in that: described light source and light beam enter to be provided with light collimating device between the module; Between described smooth extraction module and the harvester light converging device is set, is used for converging the light beam that carries luminous energy information that those give off optical fiber.
3. plastic optical fiber loss the cannot-harm-detection device according to claim 2, it is characterized in that: described light beam enter module and/or light extraction module all/or any one comprise index matching piece and fibre-optical bending clamper, be filled with index matching liquid in the index matching piece.
4. plastic optical fiber loss the cannot-harm-detection device according to claim 3 is characterized in that: the refractive index of described index-matching fluid and index matching piece requires more than or equal to the fibre cladding Refractive Index of Material; Index-matching fluid is sucrose solution, acrylic acid, glycerine or epoxy resin; The material of index matching piece is acryl resin, PMMA or polystyrene.
5. plastic optical fiber loss the cannot-harm-detection device, comprise the optical fiber drawing apparatus for preparing tested plastic optical fiber, light signal injected the light source of tested plastic optical fiber, it is characterized in that: set gradually along the optical transmission direction of light source emergent light and be useful on the tested plastic optical fiber light beam of stationary curved and enter module, light extraction module and be used for the data collector that record gives off the plastic optical fiber luminous power; Described light beam enters the refractive index of material in module and the light extraction module more than or equal to the refractive index of plastic optical fiber covering, and light beam enters fiber lengths between module and the light extraction module greater than 20m.
6. plastic optical fiber loss the cannot-harm-detection device according to claim 5, it is characterized in that: described light source and light beam enter to be provided with light collimating device between the module; Between described smooth extraction module and the harvester light converging device is set, is used for converging the light beam that carries luminous energy information that those give off optical fiber.
7. plastic optical fiber loss the cannot-harm-detection device according to claim 6, it is characterized in that: described light beam enter module and/or light extraction module all/or any one comprise index matching piece and fibre-optical bending clamper, be filled with index-matching fluid in the index matching piece.
8. plastic optical fiber loss the cannot-harm-detection device according to claim 7 is characterized in that: the refractive index of described index-matching fluid and index matching piece requires more than or equal to the fibre cladding Refractive Index of Material; Index-matching fluid is sucrose solution, acrylic acid, glycerine or epoxy resin; The material of index matching piece is acryl resin, PMMA or polystyrene.
9. plastic optical fiber loss the cannot-harm-detection device according to claim 8, it is characterized in that: described optical fiber drawing apparatus and light beam enter to be provided with the fiber storage device between the module, are used for the plastic optical fiber that interim storage measuring process is produced.
10. according to claim 4 or 9 described plastic optical fiber loss the cannot-harm-detection devices, it is characterized in that: described laser instrument is the 650nm long wavelength laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220153761 CN202836923U (en) | 2012-04-12 | 2012-04-12 | Non-destructive testing device for transmission loss of plastic optical fibre |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220153761 CN202836923U (en) | 2012-04-12 | 2012-04-12 | Non-destructive testing device for transmission loss of plastic optical fibre |
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| CN202836923U true CN202836923U (en) | 2013-03-27 |
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| CN 201220153761 Expired - Fee Related CN202836923U (en) | 2012-04-12 | 2012-04-12 | Non-destructive testing device for transmission loss of plastic optical fibre |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661850A (en) * | 2012-04-12 | 2012-09-12 | 中国科学院西安光学精密机械研究所 | Non-destructive testing device for transmission loss of plastic optical fibre |
| CN106198565A (en) * | 2016-08-30 | 2016-12-07 | 武汉睿芯特种光纤有限责任公司 | A kind of method and device detecting doubly clad optical fiber holiday |
-
2012
- 2012-04-12 CN CN 201220153761 patent/CN202836923U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661850A (en) * | 2012-04-12 | 2012-09-12 | 中国科学院西安光学精密机械研究所 | Non-destructive testing device for transmission loss of plastic optical fibre |
| CN106198565A (en) * | 2016-08-30 | 2016-12-07 | 武汉睿芯特种光纤有限责任公司 | A kind of method and device detecting doubly clad optical fiber holiday |
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| CF01 | Termination of patent right due to non-payment of annual fee |