CN102520509A - photonic crystal optical fiber splicing imaging system - Google Patents
photonic crystal optical fiber splicing imaging system Download PDFInfo
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- CN102520509A CN102520509A CN201110402683XA CN201110402683A CN102520509A CN 102520509 A CN102520509 A CN 102520509A CN 201110402683X A CN201110402683X A CN 201110402683XA CN 201110402683 A CN201110402683 A CN 201110402683A CN 102520509 A CN102520509 A CN 102520509A
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Abstract
The invention discloses a photonic crystal optical fiber splicing imaging system, comprising a first imaging unit and a second imaging unit which are respectively used for obtaining the images of the end surfaces of two spliced photonic crystal fibers arranged oppositely. The first imaging unit comprises a light source module and a microscopy imaging module, wherein the light source module is arranged on one side of the end surface of a first photonic crystal fiber to be spliced, and irradiates the emitted light on the end surface, and the microscopy imaging module is positioned on one side on which the light source module is arranged, and is used for receiving the light reflected by the end surface and obtaining the image of the end surface; the structure of the second imaging unit is the same as that of the first imaging unit, the set positions of the all modules included by the second imaging unit, relative to the end surface of a second photonic crystal fiber to be spliced, are the same as those of the all modules included by the first imaging unit, relative to the end surface of the first photonic crystal fiber. The photonic crystal fiber splicing imaging system fully considers the influences of the factors such as stray light, reflected light, coherent light and the like, simultaneously obtains the images of the end surfaces of the two spliced fibers due to the design of a transition light path, is simple in structure, has a clear image, and meets the splicing demands.
Description
Technical field
The present invention relates to the photon crystal optical fiber fusion splicing technology, particularly relate to a kind of photon crystal optical fiber fusion splicing imaging system.
Background technology
PCF (Photonic Crystal Fiber, photonic crystal fiber) claims HF (Holey Fiber, porous optical fiber) or MOF (Microstructure Optical Fibers, microstructured optical fibers) again, and coming out from it just causes various countries scholar's extensive concern.PCF has the unexistent unusual characteristic of a lot of ordinary optic fibres, like high non-linearity, chromatic dispersion controllable characteristics, high birefringence rate, unlimited unimodular property, big single mode mould field etc., can be widely used in fields such as communication, imaging, spectroscopy and biomedicine.Along with the further investigation to PCF characteristic and production technology, people begin its application of extensive exploratory development, like exploitation PCF sensor, PCF laser instrument, PCF nonlinear application and the application of photonic crystal polarization maintaining optical fibre etc.In these are used, all be faced with the fusion techniques problem of PCF, this has caused a lot of scholars' very big concern.The geometry that PCF is complicated makes fusion process become complicated more, when welding, and the accurate aligning of two optical fiber, the power that welding system provides, the time of welding, low-loss calculating or the like all need be obtained the end face information of PCF.But; When the imaging system of employing traditional fiber heat sealing machine formed images to photonic crystal fiber, the sharpness of image was lower, and because the existence of PCF covering airport; Make imaging system be difficult to find the fibre core of optical fiber; Adopt the PCF outward flange can increase deviation of the alignment again, the welding quality is reduced, can not satisfy the welding demand as alignment fiducials.So,, need the needs that specific imaging system satisfies its welding to PCF.
Summary of the invention
The technical matters that (one) will solve
The technical matters that the present invention will solve provides a kind of photon crystal optical fiber fusion splicing imaging system, and to overcome prior art in the photon crystal optical fiber fusion splicing process, image definition is low, can not satisfy the defective of welding demand.
(2) technical scheme
In order to solve the problems of the technologies described above, the present invention provides a kind of photon crystal optical fiber fusion splicing imaging system, and it comprises: first image-generating unit and second image-generating unit are respectively applied for the end view drawing picture that obtains over against two photonic crystal fibers that are fused of placing;
Said first image-generating unit comprises: light source module, be arranged on the first photonic crystal fiber end face, one side that is fused, and be used for the irradiate light of sending at said end face; The micro-imaging module is positioned at the side that said light source module belongs to, and is used to receive the light of said end face reflection, and obtains said end view drawing picture;
The structure of said second image-generating unit is identical with the structure of said first image-generating unit, it each module that comprises with respect to the second photonic crystal fiber end face that is fused be provided with position and each module of first image-generating unit with respect to the first photonic crystal fiber end face that the position is set is identical.
Wherein, said light source module comprises:
Illuminating source;
Collimation lens is arranged on said illuminating source the place ahead, is used for the light that said illuminating source the sends processing that collimates;
Polarization splitting prism is arranged on said collimation lens the place ahead, is used for the collimated ray after handling through said collimation lens is carried out light-splitting processing, is divided into P light and S light, P transmittance, S light total reflection;
Catoptron is arranged on said first photonic crystal fiber end face the place ahead, and its reflecting surface all becomes 45 ° of angles with P light light with the first photonic crystal fiber axis, is used for P light reflection back is shone to the first photonic crystal fiber end face;
Quarter wave plate is arranged between said first photonic crystal fiber end face and the catoptron, is used for seeing through P light, and converts the P light that sees through for twice into S light.
Wherein, said micro-imaging module comprises:
Amplification module is arranged on said polarization splitting prism one side, is used for amplifying carrying out optics through the S light that has the first photonic crystal fiber end face information of quarter wave plate, catoptron and polarization splitting prism successively behind the said first photonic crystal fiber end face reflection;
Image-forming module links to each other with said amplification module, is used for the said first photonic crystal fiber end face is carried out to picture.
Wherein, said amplification module comprises the object lens and the eyepiece of coaxial setting.
Wherein, said image-forming module is CCD (Charge-coupled Device, a charge coupled cell) micro-imaging module.
Wherein, said system also comprises: control module, link to each other with quarter wave plate with said catoptron, and be used for after the micro-imaging module is obtained the first photonic crystal fiber end view drawing picture, catoptron and quarter wave plate being removed.
Wherein, said catoptron and quarter wave plate are encapsulated on the platform.
Wherein, said catoptron is a double mirror, and its two reflectings surface become 45 ° of angles with the axis of two photonic crystal fibers that are fused respectively.
Wherein, said illuminating source is LED (Light Emitting Diode, a light emitting diode) light source.
Wherein, said polarization splitting prism is Glan-Taylor's polarization splitting prism.
(3) beneficial effect
Photon crystal optical fiber fusion splicing imaging system of the present invention; Take into full account the influence of factors such as parasitic light, reflected light, coherent light, utilized the selection trafficability characteristic of polarized light, can reduce optical energy loss on the one hand; Also can avoid simultaneously the generation of interference, improve image quality; Control module can be realized the control to catoptron and quarter wave plate, behind the end view drawing picture that gets access to optical fiber fusion, it is removed, for ensuing aligning and welding work are prepared; CCD micro-imaging module adopts numeral to amplify again through after Liar and the eyepiece amplification, and integral body can reach the enlargement factor more than 1500 times, can satisfy the needs of the follow-up identification of fiber end face image.Photon crystal optical fiber fusion splicing imaging system of the present invention can obtain by the end face information of molten optical fiber, for photon crystal optical fiber fusion splicing provides sufficient parameter foundation in real time.
Description of drawings
Fig. 1 is the schematic diagram of a kind of photon crystal optical fiber fusion splicing imaging system of the embodiment of the invention.
Wherein, 1: the one PCF; 2: the two PCF; 3: the first collimation lenses; 4: the first polarization splitting prisms; 5: double mirror; 6: the first quarter wave plates; 7: the first object lens; 8: the first eyepieces; 9: the second collimation lenses; 10: the second polarization splitting prisms; 11: the second quarter wave plates; 12: the second object lens; 13: the second eyepieces.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
The schematic diagram of a kind of photon crystal optical fiber fusion splicing imaging system of the embodiment of the invention is as shown in Figure 1, and said system comprises first image-generating unit and second image-generating unit, is respectively applied for the end view drawing picture that obtains over against two photonic crystal fibers that are fused of placing.In the present embodiment, the molten photonic crystal fiber of two velamens is designated as a PCF1 and the 2nd PCF2 respectively, and imaging system is obtained the end view drawing picture of a PCF1 and the 2nd PCF2 simultaneously.The structure of image-generating unit of end view drawing picture that is used to obtain two optical fiber is identical, in first image-generating unit each module with respect to a PCF1 be provided with each module in position and second image-generating unit with respect to the 2nd PCF2 that the position is set is identical.Be example with first image-generating unit below, come to introduce in detail its structure and principle of work.
First image-generating unit mainly comprises light source module and micro-imaging module; Light source module is used for the molten end face of the quilt of its irradiate light of sending to the PCF1; The micro-imaging module is used to receive the light by molten fiber end face reflection, obtains by molten fiber end face image.In the present embodiment, light source module specifically comprises the led light source as illuminating source; Be arranged on led light source the place ahead and be used for the light that led light source the sends processing that collimates with coaxial first collimation lens, 3, the first collimation lenses 3 of light that led light source sends; First collimation lens, 3 the place aheads are provided with first polarization splitting prism 4, are used for the collimated ray after 3 processing of first collimation lens is carried out light-splitting processing, are divided into the P with respect to 4 transmissions of first polarization splitting prism
1The S of light and total reflection
1Light; In first polarization splitting prism, 4 the place aheads, also be provided with double mirror 5, double mirror 5 is positioned at a PCF1 simultaneously by the place ahead of molten end face, and its reflecting surface respectively with P through 4 transmissions of first polarization splitting prism
1Light light becomes 45 ° of angles with a PCF1 axis, makes that shining a PCF1 can be returned according to former road by the light on the molten end face; A double mirror 5 and a PCF1 also are provided with first quarter wave plate, 6, the first quarter wave plates 6 between the molten end face and can be seen through P
1Light, and can be with the double P that sees through
1Light converts S into
2Light makes S
2Light is through double mirror 5 reflections, again through 4 total reflections of first polarization splitting prism, in the side ejaculation of first polarization splitting prism 4.
Corresponding with above-mentioned light source module structure, the micro-imaging module specifically comprises amplification module and the image-forming module of being made up of first object lens 7 and first eyepiece 8; Amplification module is arranged on first polarization splitting prism 4 and transmits the S that has the molten end face information of PCF1 quilt
2One side of light is used for S
2Light carries out optics and amplifies; Image-forming module links to each other with amplification module, and so that a PCF1 is carried out to picture by molten end face, image-forming module is a CCD micro-imaging module among the embodiment.
In the present embodiment, selecting led light source as illuminating source, is because led light source has characteristics such as energy-saving and environmental protection, the life-span is long, volume is little; The more important thing is that led light source has considerable characteristic concerning Flame Image Process, promptly it is a DC driven; Luminance brightness can keep constant for a long time; And common halogen family and fluorescent light all are AC driving, and luminance brightness also can corresponding one-tenth sinusoidal variation, particularly when the frequency of high speed camera collection has been higher than the frequency of light source; Just be difficult to during images acquired obtain consistent illumination, even " black " can occur.The lighting system of led light source is selected coaxial front light-source lighting system for use, this kind lighting system, and light source and camera lens are equidirectional goes out; At first blush, camera lens itself is a light source seemingly, uses a semi-permeable mirror to place video camera the place ahead with 45; Beat diffusion light from the next door of mirror, half the light can be via specularly reflected to object, and second half then passes mirror and disappears; As for the light of returning from reflection object, half is sent back and passes mirror, and on video camera, forms images; Second half then passes mirror and disappears, and the said just light source module structure as above-mentioned of this principle is the same, adopts polarization splitting prism and catoptron to realize coaxial front light-source lighting system.
In the present embodiment; First polarization splitting prism 4 is selected Glan-Taylor's polarization splitting prism for use; Because Glan-Taylor's polarization splitting prism when the light that can led light source be sent is divided into the S light of P light and total reflection of transmission, has wideer wave band and the higher light beam transmitance of seeing through.It sees through wavelength and may extend to ultraviolet band, because the incident angle of its incident ray on air interface be near Brewster angle, it is minimum to make reflection loss drop to.Carrying out the light reflection; Make in the design that light returns according to former road, present embodiment is selected double mirror 5 for use, and its effect is to utilize an optical element; Realize the reflection function of light in first image-generating unit and second image-generating unit simultaneously; Reduce the quantity of optical element set between the molten fiber end face of two velamens, make the molten fiber end face of two velamens under approaching as far as possible situation, obtain its end view drawing picture, realize its aligning and welding; Certainly adopt two single face catoptrons also to be fine as the catoptron of first image-generating unit and second image-generating unit respectively.
In the present embodiment; The selection of first quarter wave plate 6; Be based on following principle: when linearly polarized light with the fast axle clamp of quarter wave plate angle be after 45 impinges perpendicularly on wave plate; When this left circularly polarized light process reflection; Once more vertically through behind the quarter wave plate; Emergent ray is a linearly polarized light, and this emerging ray polarized light is with respect to former incident ray polarized light, and direction of vibration turns over
.Based on this; Twice of the P light of being told by first polarization splitting prism 4 is vertical through after first quarter wave plate 6; Conversion when the former road of S light is back to first polarization splitting prism 4, realizes total reflection for S light; Become 90 ° of angles to depart from initial light, the space of abundance is provided for the setting of micro-imaging module by led light source directive first polarization splitting prism 4.
In the present embodiment, under approaching as far as possible situation, obtain its end view drawing picture in order to satisfy the molten optical fiber of two quilts, to reduce the error of subsequent alignment process; Reduce splice loss, splice attenuation; Need completely reflecting mirror 5, two quarter wave plates 6 and 11 be encapsulated on the chain-wales, through control module control chain-wales in the position at optical fiber fusion place, behind the end view drawing picture that gets access to optical fiber fusion; It is removed, for ensuing aligning and welding work are prepared.
After imaging system built according to said structure; Promptly can be used for obtaining by molten fiber end face image in the photon crystal optical fiber fusion splicing process; Its course of work is: the led light source of first image-generating unit and second image-generating unit is luminous respectively; The light that the led light source of first image-generating unit sends becomes a branch of directional light through first collimation lens 3 with beam collimation, is divided into P through first polarization splitting prism 4 then
1Light and S
1Light, the effect of Amici prism here is to P
1Light is realized transmission, S
1Light total reflection; P after the beam splitting
1Light after shine on the PCF1 end face behind first quarter wave plate 6, has a PCF1 by the P of molten end face information through double mirror 5 reflection
1Light is once more through shining on the double mirror 5 (P light through twice quarter wave plate then become S light) behind first quarter wave plate 6; The S that returns
2Light gets into the imaging of CCD micro imaging system after double mirror 5 and 4 reflections of first polarization splitting prism.
Equally, the light that the led light source of second image-generating unit sends becomes a branch of directional light through second collimation lens 9 with beam collimation, is divided into P through second polarization splitting prism 10 then
1Light and S
1Light, the effect of Amici prism here is to P
1Light is realized transmission, S
1Light total reflection; P after the beam splitting
1Light after shine on the 2nd PCF2 end face behind second quarter wave plate 11, has the 2nd PCF2 by the P of molten end face information through double mirror 5 reflection
1Light is once more through shining on the double mirror 5 S that returns behind second quarter wave plate 11
2Light gets into the imaging of CCD micro imaging system after double mirror 5 and 10 reflections of second polarization splitting prism.Two micro imaging systems to being looked like to be carried out to picture by molten photonic crystal fiber end view drawing, further obtain the end face image information through the Flame Image Process recognition system simultaneously again, for the aligning and the welding of photonic crystal fiber provides reference frame.
Can find out by above embodiment; The embodiment of the invention has taken into full account the influence of factors such as parasitic light, reflected light, coherent light, utilizes the selection trafficability characteristic of polarized light, can reduce optical energy loss on the one hand; Also can avoid simultaneously the generation of interference, improve image quality; Control module can be realized the control to catoptron and quarter wave plate, behind the end view drawing picture that gets access to optical fiber fusion, it is removed, for ensuing aligning and welding work are prepared; CCD micro-imaging module adopts numeral to amplify again through after Liar and the eyepiece amplification, and integral body can reach the enlargement factor more than 1500 times, can satisfy the needs of the follow-up identification of fiber end face image.Photon crystal optical fiber fusion splicing imaging system of the present invention can obtain by the end face information of molten optical fiber, for photon crystal optical fiber fusion splicing provides sufficient parameter foundation in real time.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and replacement, these improvement and replacement also should be regarded as protection scope of the present invention.
Claims (10)
1. the photon crystal optical fiber fusion splicing imaging system is characterized in that, said system comprises first image-generating unit and second image-generating unit, is respectively applied for the end view drawing picture that obtains over against two photonic crystal fibers that are fused of placing;
Said first image-generating unit comprises: light source module, be arranged on the first photonic crystal fiber end face, one side that is fused, and be used for the irradiate light of sending at said end face; The micro-imaging module is positioned at the side that said light source module belongs to, and is used to receive the light of said end face reflection, and obtains said end view drawing picture;
The structure of said second image-generating unit is identical with the structure of said first image-generating unit, it each module that comprises with respect to the second photonic crystal fiber end face that is fused be provided with position and each module of first image-generating unit with respect to the first photonic crystal fiber end face that the position is set is identical.
2. photon crystal optical fiber fusion splicing imaging system according to claim 1 is characterized in that, said light source module comprises:
Illuminating source;
Collimation lens is arranged on said illuminating source the place ahead, is used for the light that said illuminating source the sends processing that collimates;
Polarization splitting prism is arranged on said collimation lens the place ahead, is used for the collimated ray after handling through said collimation lens is carried out light-splitting processing, is divided into P light and S light, P transmittance, S light total reflection;
Catoptron is arranged on said first photonic crystal fiber end face the place ahead, and its reflecting surface all becomes 45 ° of angles with P light light with the first photonic crystal fiber axis, is used for P light reflection back is shone to the first photonic crystal fiber end face;
Quarter wave plate is arranged between said first photonic crystal fiber end face and the catoptron, is used for seeing through P light, and converts the P light that sees through for twice into S light.
3. photon crystal optical fiber fusion splicing imaging system according to claim 2 is characterized in that, said micro-imaging module comprises:
Amplification module is arranged on said polarization splitting prism one side, is used for amplifying carrying out optics through the S light that has the first photonic crystal fiber end face information of quarter wave plate, catoptron and polarization splitting prism successively behind the said first photonic crystal fiber end face reflection;
Image-forming module links to each other with said amplification module, is used for the said first photonic crystal fiber end face is carried out to picture.
4. photon crystal optical fiber fusion splicing imaging system according to claim 3 is characterized in that, said amplification module comprises the object lens and the eyepiece of coaxial setting.
5. photon crystal optical fiber fusion splicing imaging system according to claim 3 is characterized in that, said image-forming module is a CCD micro-imaging module.
6. photon crystal optical fiber fusion splicing imaging system according to claim 2; It is characterized in that; Said system also comprises: control module, link to each other with quarter wave plate with said catoptron, and be used for after the micro-imaging module is obtained the first photonic crystal fiber end view drawing picture, catoptron and quarter wave plate being removed.
7. photon crystal optical fiber fusion splicing imaging system according to claim 6 is characterized in that, said catoptron and quarter wave plate are encapsulated on the platform.
8. photon crystal optical fiber fusion splicing imaging system according to claim 2 is characterized in that, said catoptron is a double mirror, and its two reflectings surface become 45 ° of angles with the axis of two photonic crystal fibers that are fused respectively.
9. according to each described photon crystal optical fiber fusion splicing imaging system of claim 2 to 8, it is characterized in that said illuminating source is a led light source.
10. according to each described photon crystal optical fiber fusion splicing imaging system of claim 2 to 8, it is characterized in that said polarization splitting prism is Glan-Taylor's polarization splitting prism.
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| CN 201110402683 CN102520509B (en) | 2011-12-07 | 2011-12-07 | photonic crystal optical fiber splicing imaging system |
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| CN102890309A (en) * | 2012-09-24 | 2013-01-23 | 北京航空航天大学 | Polarization-maintaining photonic crystal fiber and panda fiber welding method |
| CN102998788A (en) * | 2012-11-28 | 2013-03-27 | 北京信维科技股份有限公司 | Imaging system of fiber fusion splicer and fiber fusion splicer |
| CN104297849A (en) * | 2014-11-06 | 2015-01-21 | 成磊 | Welding method for photonic crystal fibers |
| CN105023871A (en) * | 2015-06-24 | 2015-11-04 | 中国电子科技集团公司第四十五研究所 | Vision system for opposite side alignment |
| CN105676362A (en) * | 2016-04-19 | 2016-06-15 | 安徽理工大学 | Optical fiber fusion splicing method and device thereof |
| CN105911647A (en) * | 2016-05-18 | 2016-08-31 | 华中科技大学 | Multi-core fan-in and fan-out module coupling encapsulation system |
| CN106383384A (en) * | 2016-11-23 | 2017-02-08 | 中国人民解放军国防科学技术大学 | Hollow fiber and solid core fiber butting and packaging system and method thereof |
| CN107390323A (en) * | 2017-09-16 | 2017-11-24 | 蚌埠道生精密光电科技有限公司 | Heat sealing machine fiber end face imaging mechanism |
| CN109471223A (en) * | 2018-12-30 | 2019-03-15 | 安徽相和通信有限公司 | Fiber end face optical imagery structure and optical fiber splicer |
| CN111025481A (en) * | 2019-12-23 | 2020-04-17 | 中电科仪器仪表(安徽)有限公司 | Compact high-resolution optical fiber imaging system |
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| CN102890309A (en) * | 2012-09-24 | 2013-01-23 | 北京航空航天大学 | Polarization-maintaining photonic crystal fiber and panda fiber welding method |
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| CN109471223A (en) * | 2018-12-30 | 2019-03-15 | 安徽相和通信有限公司 | Fiber end face optical imagery structure and optical fiber splicer |
| CN111025481A (en) * | 2019-12-23 | 2020-04-17 | 中电科仪器仪表(安徽)有限公司 | Compact high-resolution optical fiber imaging system |
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