CN201477226U - Online fiber optical grating manufacturing device - Google Patents
Online fiber optical grating manufacturing device Download PDFInfo
- Publication number
- CN201477226U CN201477226U CN2009201872609U CN200920187260U CN201477226U CN 201477226 U CN201477226 U CN 201477226U CN 2009201872609 U CN2009201872609 U CN 2009201872609U CN 200920187260 U CN200920187260 U CN 200920187260U CN 201477226 U CN201477226 U CN 201477226U
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- fiber
- fiber grating
- optical fiber
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Abstract
The utility model relates to an online fiber optical grating manufacturing device. The device comprises an optical fiber perform feeder, a heating furnace, a cooling pipe, a fiber optical grating inscribing device, an optical fiber coating cup, a UV curing oven, a traction wheel and an optical fiber rolling and arranging device which are mounted on a drawing tower bracket, wherein the optical fiber perform feeder, the heating furnace, the cooling pipe, the fiber optical grating inscribing device, the optical fiber coating cup and the UV curing oven are arranged in parallel with the traction wheel, an optical fiber outer diameter measuring device is arranged between the heating furnace and the cooling pipe, and a coating outer diameter measuring device is mounted between the UV curing oven and the traction wheel. Compared with the traditional individual fiber optical grating manufacturing, the online fiber optical grating manufacturing device applied in the optical fiber drawing process has the advantages of higher manufacturing efficiency, flexible technique and even coating, and the production speed can be improved by hundreds of times, thereby greatly reducing the cost. The device is feasible to realize the scale fiber optical grating production.
Description
Technical field
The utility model relates to the fiber optic passive device of optical fiber communication and sensory field of optic fibre, relates in particular to a kind of producing device of fiber grating.
Background technology
Fiber grating is development in recent years one of optical passive component the most rapidly, in view of its advantage of many uniquenesses, thereby in optical fiber communication and sensory field of optic fibre very wide prospect is arranged all.Because the appearance of fiber grating makes many complicated all optical communications and sensing mode become possibility, has greatly widened the range of application of optical fiber technology.
Fiber grating is a photosensitivity of utilizing fiber optic materials, it is the permanent change that the germanium ion interaction causes refractive index in extraneous incident photon and the fiber core, thereby form the space phase grating in fiber core, its effect comes down to form transmission or the reflective filter or the catoptron of an arrowband in fiber core.Utilize this characteristic can constitute the fiber optic passive device of many special performances.For example, utilize the arrowband high reflectance characteristic of fiber grating to constitute the optical fiber feedback cavity, dependence Er-doped fiber etc. promptly can be made into fiber laser for gain media; With the exocoel reverberator of fiber grating, can constitute the extenal cavity tunable laser diode as laser diode; Utilize fiber grating can constitute the optical fiber filter of Michelson interferometer type, Mach-Zehnder interferometer type and Fabry-Perot interferometer type; Utilize the inhomogeneous fiber grating to can be made into optic fibre dispersion compensator or the like.In addition, utilize fiber grating also to can be made into and be used to detect stress, strain, the isoparametric Fibre Optical Sensor of temperature and optical fiber sensing network.
Fiber Bragg Grating FBG (FBG, fiber Bragg grating) principle is that fiber core district refractive index cycle changes the change that causes the fibre-optic waveguide condition, causing the light wave of certain wavelength that corresponding Mode Coupling takes place, make its transmitted spectrum and reflectance spectrum unusual characteristic occur. Fig. 1 represents the index distribution situation in fiber grating zone and the spectrogram of incident light, reflected light and transmitted light.Wherein, n
1Be fibre cladding refractive index, n
2Be fiber core initial index of refraction, n
3For photon-induced refractive index changes function, Λ is the grating cycle.The centre wavelength of the reflection Bradley lattice wave of fiber grating is: λ
B=2n
EffIn the Λ formula, n
EffBe fiber core grating region effective refractive index.
The classical production process of fiber grating is: adopt suitable light source and optical fiber enhanced sensitivity technology, can write grating to some extent on the optical fiber of almost all kinds.The photosensitivity that the photon-induced refractive index of optical fiber changes mainly shows near wavelength is the absorption peak of ultraviolet light of 244nm, so utilize the interaction of the germanium ion in ultraviolet light and the fiber core to cause the permanent change of refractive index, be periodically variable space phase grating thereby in fiber core, form refractive index.The manufacture method of fiber grating is divided into horizontal interferometric method and phase mask method two big classes usually.The former be utilize interference fringe that two-beam interference produces to exposed optical fiber to form fiber grating, it is the phase mask device of Λ that the latter is to use one-period, diffracted beam is separated, when the ultraviolet light vertical irradiation is to the phase mask device, promptly obtaining pitch in its back is the optical fiber diffraction pattern of Λ/2, is the Fiber Bragg Grating FBG of Λ/2 thereby form pitch in UV photosensitive optical fiber.When the preparation fiber grating, need remove into the coating of grid section optical fiber, because coating can absorb ultraviolet luminous energy, influence the inscription of fiber grating.In addition, after fiber core absorbs hydrogen or its isotope (as deuterium gas), can strengthen it and absorb ultraviolet ability.Therefore optical fiber need carry the hydrogen processing before becoming grid, be exactly before inscribing FBG, need ordinary optic fibre is soaked at a certain temperature, a period of time in hydrogen and helium mix air pressure, hydrogen in the optical fiber is reached capacity, can improve the fiber core district like this absorptivity of UV (ultraviolet light) and bandwidth and the reflectivity that improves finished product FBG.Usually at 100 standard atmospheric pressures, under 100 ℃ of temperature, need to carry hydrogen 48 hours, can reduce as increase pressure, elevated temperature and carry the hydrogen time, vice versa.
Above-mentioned optical fiber becomes the grid method that following shortcoming is arranged; At first be that fiber grating is single making, manual amount is big, and production efficiency is low, the cost height; Secondly in becoming grid technique, the removal fibre coating will cause the serious decline of fiber strength, need coating once more after becoming grid, and coated technique has appreciable impact to the optical characteristics of fiber grating, non-homogeneous at random coating will cause the random drift of FBG device running parameter, influence the repeated and stable of system.
The utility model content
The technical problems to be solved in the utility model is: a kind of make efficiency height, low, the online producing device of the uniform fiber grating of coating in the drawing optical fibers process of cost are provided.
In order to overcome the defective that exists in the background technology, the technical scheme that its technical matters that solves the utility model adopts is: a kind of online producing device of fiber grating, comprise that the preform that is installed on the wire-drawer-tower support send excellent device, heating furnace, cooling tube, fiber grating is inscribed device, fibre coating is coated with inflammatory blepharoedema, the UV curing oven, traction wheel and winding and arranging device, wherein, preform send excellent device, heating furnace, cooling tube, fiber grating is inscribed device, fibre coating is coated with inflammatory blepharoedema, UV curing oven and traction wheel be arranged in parallel, be provided with optical fiber outside diameter measuring device between heating furnace and the cooling tube, be provided with coating outside diameter measuring device between UV curing oven and the traction wheel.
According to another embodiment of the present utility model, the online producing device of fiber grating further comprises 2000 ℃ of the interior temperature of described heating furnace.
According to another embodiment of the present utility model, the online producing device of fiber grating further comprises 2000 ℃ of the interior temperature of described heating furnace.
According to another embodiment of the present utility model, the online producing device of fiber grating comprises further that described fiber grating is inscribed between device and the cooling tube and is provided with the V-type guide wheel.
The online producing device of fiber grating in the drawing optical fibers process that the present invention proposes; compare with the single making of traditional fiber grating; its make efficiency height; hundreds and thousands of times of ground of speed of production improve; thereby cost reduces greatly; technology is flexible, and coating is even, is the more feasible device of realizing the fiber grating large-scale production.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is fiber grating and spectral response figure in the prior art;
Fig. 2 is MCVD depositing operation figure;
Fig. 3 is the fiber drawing tower structural representation;
Wherein: 1, wire-drawer-tower support, 2, prefabricated rods, 3, send excellent device, 4, heating furnace body, 5, outside diameter measuring device, 6, the optical fiber cooling tube, 7, fiber grating inscribes device, 8, ultraviolet source, 9, fibre coating is coated with inflammatory blepharoedema, and 10, curing oven, 11, coating outside diameter measuring device, 12, traction wheel, 13, winding and arranging device.
Embodiment
With preferred embodiment the utility model is described in further detail in conjunction with the accompanying drawings now.These accompanying drawings are the synoptic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
Usually, the optical fiber manufacturing is divided into preform making and drawing optical fibers two parts.It is MCVD (ModifiedChemical Vapor Deposition) method that light-sensitive optical fibre of the present invention gives prefabricated rods making employing modified chemical vapor deposition process (MCVD).Its process following (referring to Fig. 2): a quartzy parent tube is placed on the glass work lathe rotates, with ultrapure oxygen as carrier gas by there being SiCl
4, GeCl
4Etc. the bubbling bottle (bubble) of pure chemistry raw material, O
2Carrier gas is with SiCl
4, GeCl
4Saturated vapor bring into together in the quartzy parent tube, when temperature is 1400-1600 ℃ a oxyhydrogen flame when heating the outer wall of quartzy parent tube, by heat conduction, oxidation reaction at high temperature takes place in the phase feed in pipe, reaction equation is:
SiCl
4+O
2→SiO
2+2Cl
2↑
GeCl
4+O
2→GeO
2+2Cl
2↑
The SiO that generates
2, GeO
2On the tube wall inwall of high-temperature region airflow downstream, form the sedimentary deposit of fritted glass dust Deng oxide, when the high-temperature region of oxyhydrogen flame through herein the time, the glass dust is sintered into the glassy layer that is deposited on the homogeneous transparent on the inwall. and oxy hydrogen torch from left to right slowly moves and once forms one deck corresponding sedimentary layer, return to starting point then fast, carry out the deposition second time, and so forth till the deposition of finishing defined.Chlorine that reaction produces and the gas phase material that does not have to have reacted are then discharged from the outlet of quartzy parent tube, carry out neutralisation treatment.Here quartzy (pure SiO
2) parent tube will become the some of fibre cladding, partly will become fiber core partly and mix the germanium deposition.After deposition was finished, the center also had aperture, stops flow of feed gas then and enters, and flame temperature is elevated to about 1800 ℃, and the quartz ampoule burning shrinkage is become solid preform.Aim at the preform of making fiber grating, can improve the doping of germanium according to designing requirement, to improve the light sensitive characteristic of prefabricated rods.And prefabricated rods is carried hydrogen handle, this will carrying hydrogen technology and save cost of manufacture greatly than above-mentioned single making fiber grating.
As shown in Figure 3, a kind of online producing device of fiber grating, the excellent device 3 that send that comprises the preform 2 that is installed on the wire-drawer-tower support 1, heating furnace 4, cooling tube 6, fiber grating is inscribed device 7, fibre coating is coated with inflammatory blepharoedema 9, UV curing oven 10, traction wheel 12 and winding and arranging device 13, wherein, preform 2 send excellent device 3, heating furnace 4, cooling tube 6, fiber grating is inscribed device 7, fibre coating is coated with inflammatory blepharoedema 9, UV curing oven 10 be arranged in parallel with traction wheel 12, be provided with optical fiber outside diameter measuring device 5 between heating furnace 4 and the cooling tube 6, be provided with coating outside diameter measuring device 11 between UV curing oven 10 and the traction wheel 12.
The online manufacture craft procedure declaration of fiber grating is as follows: the photosensitive prefabricated rods 2 that will make is clamped in to be sent on the excellent device 3, and down advance rod, the fusion under the interior 2000 ℃ high temperature of heating furnace 4 of prefabricated rods 2 one ends, under the tractive force effect of traction wheel 12, be drawn as the optical fiber that external diameter is 125 μ m, the optical fiber external diameter is detected by caliper 5, and send rod and haulage speed with the error signal FEEDBACK CONTROL, to guarantee the precision of optical fiber external diameter.Optical fiber also has the high temperature about 1600 ℃ when the furnace outlet moulding, thereby needs to cool off fast through cooling tube 6, and the logical high helium of thermal conductivity forces cooling to optical fiber in the cooling tube 6.Cooled optical fiber enters fiber grating and inscribes the district and carry out grating and scribe, and is to guarantee that grating inscribes precision, and optical fiber needs through a pair of V-type groove guide wheel location.(this guide wheel does not illustrate in the drawings).Optical fiber is between two V-type groove guide wheels, and its space geometry position is very stable.Grating is just scribed and is carried out in this section.Usually adopt the monopulse light-source system, ultraviolet source 8 adopts the KrF excimer laser, and fiber grating is inscribed device 7 can two kinds of methods: the one, and light beam after being focused into elongate strip, cylindrical mirror is impinged upon optical fiber side, exposes, inscribe grating.The 2nd, adopt mask, make light beam pass through a slit baffle plate, shine on the optical fiber and expose, inscribe grating.Laser wavelength is 248nm, the about 240mJ of the average energy of each pulse.The grating periods lambda is decided by the recurrence interval T and the drawing speed of optical fiber v of laser instrument: i.e. Λ=Tv.As drawing speed is 1200m/min, and the recurrence interval is 25ns, and then can get the grating periods lambda is 0.5 μ m.At this moment, as grating region effective refractive index n
EffBe 1.5 o'clock, reflected wavelength lambda
BThen be 1500nm.In continuous online making fiber grating technology, the length of each grating, promptly the periodicity N of each grating multiply by periods lambda, and the distance between each grating is the (not shown) that is realized by the photoswitch operation circuit in the light path system.Optical fiber becomes to enter behind the grid and applies cup 9 and carry out coating and apply, and is different with the telecommunication optical fiber of routine, becomes the coating of grid optical fiber to select various coating for use according to the request for utilization of fiber grating.Particularly when fiber grating is used as sensor, fibre coating in fact promptly is its backing material, thereby can realize the enhanced sensitivity of fiber grating or go quick requirement that this application for fiber grating has very important meaning by the mechanics parameter of control coating material.These parameters comprise the elastic modulus of coating material, Poisson ratio, thermal expansivity and coating thickness etc.Therefore the coating coating processes in the drawing process of the present invention is with flexibility and changeability, to adapt to the requirement of different coating.Curing oven 10 can be that the UV curing oven is used for the UV solidified coating, also can be that the heat curing stove is used for heat-curable coating.Become grid optical fiber after after traction wheel 12 tractions, by winding and arranging device 13 rollings on drum.
The fiber data that the present invention can be made into is, but is not limited to: fibre core diameter is about 10 μ m; The fibre cladding external diameter is 125 μ m; Numerical aperture is 0.12; Cutoff wavelength is 1250nm.
Online one-tenth grid method of the present invention is applicable to fully that also making long period fiber grating and refractive index spatial distribution and fiber axis has low-angle glittering (Blazed) grating.
For guaranteeing the making precision of above-mentioned online fiber grating, must be equipped with extremely stable light source and light path system; Must guarantee the extremely stable of drawing speed, this needs to realize by equipping high-precision electric control system and mechanical driving device.Also must guarantee the extremely stable of wire-drawer-tower environmental baseline, these conditions comprise environment temperature and humidity, degree of purification, vibrations and noise etc., this than the fiber drawing tower of routine require much higher.
With above-mentioned foundation desirable embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the instructions, must determine its technical scope according to the claim scope.
Claims (4)
1. the online producing device of a fiber grating, it is characterized in that: comprise that the preform that is installed on the wire-drawer-tower support send excellent device, heating furnace, cooling tube, fiber grating is inscribed device, fibre coating is coated with inflammatory blepharoedema, the UV curing oven, traction wheel and winding and arranging device, wherein, preform send excellent device, heating furnace, cooling tube, fiber grating is inscribed device, fibre coating is coated with inflammatory blepharoedema, UV curing oven and traction wheel be arranged in parallel, be provided with optical fiber outside diameter measuring device between heating furnace and the cooling tube, be provided with coating outside diameter measuring device between UV curing oven and the traction wheel.
2. the online producing device of fiber grating as claimed in claim 1 is characterized in that: 2000 ℃ of the temperature in the described heating furnace.
3. the online producing device of fiber grating as claimed in claim 1 is characterized in that: described fiber grating is inscribed device and is adopted ultraviolet source, and described ultraviolet source is an excimer laser, and wavelength is 248nm.
4. the online producing device of fiber grating as claimed in claim 1 is characterized in that: be provided with the V-type guide wheel between described fiber grating inscription device and the cooling tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201872609U CN201477226U (en) | 2009-08-31 | 2009-08-31 | Online fiber optical grating manufacturing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201872609U CN201477226U (en) | 2009-08-31 | 2009-08-31 | Online fiber optical grating manufacturing device |
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| Publication Number | Publication Date |
|---|---|
| CN201477226U true CN201477226U (en) | 2010-05-19 |
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| CN2009201872609U Expired - Lifetime CN201477226U (en) | 2009-08-31 | 2009-08-31 | Online fiber optical grating manufacturing device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590929A (en) * | 2012-02-17 | 2012-07-18 | 武汉理工大学 | Method for continuously preparing fiber gratings on line |
| CN103869409A (en) * | 2014-03-24 | 2014-06-18 | 江苏南方通信科技有限公司 | On-line manufacturing method of optical fiber grating |
| CN103900620A (en) * | 2014-03-20 | 2014-07-02 | 何祖源 | Device and method for continuously manufacturing optical fiber sensors |
| CN104402215A (en) * | 2014-11-27 | 2015-03-11 | 西安西古光通信有限公司 | Method and device for correcting center of optical fiber drawing tower |
| CN104478209A (en) * | 2014-11-28 | 2015-04-01 | 南京烽火藤仓光通信有限公司 | Device for lowering cooling pipe helium consumption in optical fiber production process |
| CN104678486A (en) * | 2015-03-17 | 2015-06-03 | 武汉理工大学 | Preparation method of fiber grating |
| CN105783956A (en) * | 2016-05-16 | 2016-07-20 | 武汉理工大学 | Large-capacity weak grating array processing apparatus and method |
| CN106353852A (en) * | 2016-11-18 | 2017-01-25 | 安徽蓝海之光科技有限公司 | Manufacturing method for low-cost long-period fiber bragg grating |
| CN106525094A (en) * | 2016-10-28 | 2017-03-22 | 武汉理工大学 | Method and system for online preparation of large-capacity intrinsic type F-P sensor array |
| CN107340565A (en) * | 2017-08-25 | 2017-11-10 | 武汉理工大学 | A kind of online device and method for preparing optical fiber optical grating array automatic switchover wavelength |
| CN109655962A (en) * | 2019-02-28 | 2019-04-19 | 武汉理工大学 | The method that femtosecond laser inscribes grating array and the measurement of quasi-distributed many reference amounts online |
| CN109655964A (en) * | 2019-02-28 | 2019-04-19 | 武汉理工大学 | Online preparation has the method and device of the long-period fiber grating of fixed point coating |
| CN109855662A (en) * | 2019-02-28 | 2019-06-07 | 武汉理工大学 | The method and device of the quasi-distributed many reference amounts measurement of fiber Bragg grating F-P chamber array |
-
2009
- 2009-08-31 CN CN2009201872609U patent/CN201477226U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590929A (en) * | 2012-02-17 | 2012-07-18 | 武汉理工大学 | Method for continuously preparing fiber gratings on line |
| CN103900620A (en) * | 2014-03-20 | 2014-07-02 | 何祖源 | Device and method for continuously manufacturing optical fiber sensors |
| CN103900620B (en) * | 2014-03-20 | 2016-03-30 | 上海交通大学 | A kind of device and method of continuous manufacture Fibre Optical Sensor |
| CN103869409A (en) * | 2014-03-24 | 2014-06-18 | 江苏南方通信科技有限公司 | On-line manufacturing method of optical fiber grating |
| CN104402215A (en) * | 2014-11-27 | 2015-03-11 | 西安西古光通信有限公司 | Method and device for correcting center of optical fiber drawing tower |
| CN104478209A (en) * | 2014-11-28 | 2015-04-01 | 南京烽火藤仓光通信有限公司 | Device for lowering cooling pipe helium consumption in optical fiber production process |
| CN104678486A (en) * | 2015-03-17 | 2015-06-03 | 武汉理工大学 | Preparation method of fiber grating |
| CN105783956A (en) * | 2016-05-16 | 2016-07-20 | 武汉理工大学 | Large-capacity weak grating array processing apparatus and method |
| CN106525094A (en) * | 2016-10-28 | 2017-03-22 | 武汉理工大学 | Method and system for online preparation of large-capacity intrinsic type F-P sensor array |
| CN106353852A (en) * | 2016-11-18 | 2017-01-25 | 安徽蓝海之光科技有限公司 | Manufacturing method for low-cost long-period fiber bragg grating |
| CN106353852B (en) * | 2016-11-18 | 2019-08-02 | 安徽蓝海之光科技有限公司 | A kind of long-period fiber grating production method of low cost |
| CN107340565A (en) * | 2017-08-25 | 2017-11-10 | 武汉理工大学 | A kind of online device and method for preparing optical fiber optical grating array automatic switchover wavelength |
| CN107340565B (en) * | 2017-08-25 | 2018-10-09 | 武汉理工大学 | A kind of online device and method for preparing optical fiber optical grating array and automatically switching wavelength |
| CN109655962A (en) * | 2019-02-28 | 2019-04-19 | 武汉理工大学 | The method that femtosecond laser inscribes grating array and the measurement of quasi-distributed many reference amounts online |
| CN109655964A (en) * | 2019-02-28 | 2019-04-19 | 武汉理工大学 | Online preparation has the method and device of the long-period fiber grating of fixed point coating |
| CN109855662A (en) * | 2019-02-28 | 2019-06-07 | 武汉理工大学 | The method and device of the quasi-distributed many reference amounts measurement of fiber Bragg grating F-P chamber array |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100830 Address after: 213104 Cen Cun road, Luoyang Town, Wujin District, Changzhou Patentee after: Jiangsu Nanfang Communications Technology Co., Ltd. Address before: 213104 Cen Cun road, Luoyang Town, Wujin District, Jiangsu, Changzhou Patentee before: Changzhou Southern Communication Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
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| CX01 | Expiry of patent term |