CN1194237C - Optical fibre array - Google Patents
Optical fibre array Download PDFInfo
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- CN1194237C CN1194237C CNB021158428A CN02115842A CN1194237C CN 1194237 C CN1194237 C CN 1194237C CN B021158428 A CNB021158428 A CN B021158428A CN 02115842 A CN02115842 A CN 02115842A CN 1194237 C CN1194237 C CN 1194237C
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Abstract
The present invention provides an optical fiber array. An upper substrate and/or a lower substrate are/is made of photoabsorption materials. Optical attenuation glass with an optical attenuation function are preferred. The total absorption rate of the substrates is larger than 20dB and smaller than 40dB, photoabsorption materials of 7 to 12 dB/mm are adopted generally, and the refractive index is between 1.4 and 1.6. The present invention has the advantages of lowered crosstalk among optical fiber channels and simple manufacture method, and the crosstalk problem among optical fiber channels caused by reflection and scattering is effectively lowered without larger change or adopting a complicated structure. Thereby, the performance of devices in a system is improved, unimagined effects are generated, and technical problems which puzzle the field are solved.
Description
Technical field
The present invention relates to a kind of novel fiber array, particularly adopt the material that can absorb transmission light in the optical fiber to fix array fibre, can reduce the fiber array of crosstalking between the optical-fibre channel in the optical arrays device.Be mainly used in carrying out in the fiber optic communication field optically-coupled of array device, such as the coupling that is used for AWG and optical fiber, the coupling of array laser and array fibre, coupling of detector array and array fibre or the like.Can effectively reduce crosstalking between the optical-fibre channel that causes owing to end face reflection, scattering and other reasons.Be mainly used in the array device of fiber optic communication field.
Background technology
At present, along with the continuous increase of information communication amount, optical communication is moving towards integrated road.Traditional device is all developing to the stronger direction of the more performances of the littler function of volume.In optical communication, measurement and other association areas because the widespread use of fiber waveguide device, with it the application of Ou He fiber array more and more widely, method for making also gets more and more thereupon, fabricating quality, technology, efficient and integrated level improve constantly.
Array fibre structurally mainly adopts the V-type groove to make infrabasal plate peace substrate at present and does the bonding method making of upper substrate, and material mostly is silicon, glass, plastics etc.General method for making is, optical fiber one end covering is taken out, and exposes bare fibre, puts it in the V-type groove, and gluing is put upper substrate thereon then, compresses, and alignment makes adhesive curing, will not have the end face polishing of optical fiber again, promptly becomes fiber array.The fiber array end view drawing of a standard is referring to Fig. 1.
Making manufacturer has a lot of families, and domestic light is fast, on annotate, external Samsung, or the like.
Because the requirement of device, the optical fiber spacing is generally very little, and in the application of fiber array, topmost problem is exactly will overcome between the adjacent fiber owing to influencing each other that light scattering, reflection produce, and promptly crosstalks.For example also can produce in array laser that causes by the scattering of array laser emergent light and the array fibre coupling process and crosstalk.As shown in Figure 2.
The method that solution is crosstalked puts forward on United States Patent (USP) (Patent No.:US6,277,668 B1).His main path is to add overhead gage (material is grown on the detector limit) between the detector, when using, fiber array as far as possible near detector, is shown as Fig. 3.Do like this to reduce effectively and crosstalk, still, significantly come as can be seen, adding overhead gage between detector is a very thing of trouble, and this baffle plate grows out together with detector on silica-based, and it is very difficult that this technology implements.And, optical fiber aim at detector the coupling process in be easy to injure fiber end face.The patent 98806193 of Corning Incorporated's application (being used for multiplexed and phased fiber array demultiplexing) has proposed the method for phase shift, prevents the cross-couplings problem in the Waveguide array, and method is complicated.
Summary of the invention
The objective of the invention is to design a kind of simple, effectively reduce the cross-interference issue between the optical-fibre channel that reflection, scattering cause, and do not have bigger change or adopt complicated structure, thereby improved the performance of device in system, and the splendid novel optical fiber array of effect.
Fiber array of the present invention comprises upper and lower substrate and array fibre, and infrabasal plate is the V-type groove, with fibre clip between, upper substrate and infrabasal plate are to adopt the light absorbing material of 7-12dB/mm to make, the expansion coefficient of light absorbing material is less than 3 * 10
6/ K, refractive index between 1.4 to 1.6, the overall light absorptivity of upper substrate and infrabasal plate greater than 20dB less than 40dB.
Described fiber array, upper substrate and infrabasal plate are to adopt the light absorption glass material, and promptly the optical attenuation glass material is made.
Described fiber array, upper and lower substrate end-face become 7～10 degree angles with the equal rubbing down of fiber end face, and are coated with the anti-reflection film at the specific wavelength of optical fiber.
Advantage of the present invention is to select for use light absorbing material to make, and greatly reduces crosstalking between optical channel.Method for making is simple, identical with classic method, just use light absorbing material, as optical attenuation glass, as the fluctuate interlayer of fiber array, location and fixed fiber, effectively reduce the cross-interference issue between the optical-fibre channel that reflection, scattering cause, and do not had bigger change or adopt complicated structure, thereby improved the performance of device in system, produce beyond thought effect, solved the technical barrier that perplexs this field.
Description of drawings
Fig. 1 is the end view drawing of the fiber array of classic method making.1-1 is that upper substrate is a cover plate, and 1-2 is that infrabasal plate is an egative film, and 1-3 is an optical fiber, and 1-4 is a glue.Cover plate 1-1 generally adopts glass material, and egative film 1-2 is the V-type groove, with fibre clip between, connect with 353ND is gluing, then with the end face rubbing down.
Synoptic diagram when Fig. 2 is a laser array 2 and fiber array 1 coupling.In order to reach better coupling efficiency, between laser array 2 and fiber array 1, put into lens arra 3.The light a that laser instrument 2-1 sends is coupled into optical fiber 1-3 through converging of lens 3-1.Under desirable situation, light will all be coupled into optical fiber, but because the mould field of light is oval, be not coupled into optical fiber with regard to some light b, but penetrate on the upper cover plate or lower master film of fiber array, reflected back lens arra then, secondary reflection just might enter in another light path again, enter optical fiber, formation is crosstalked.When cover plate or egative film adopted absorbing material, this part light b will be absorbed, thereby avoided or reduced and crosstalked.
Fig. 3 is that the utilization U.S. Patent number is US6, and 277,668 B1 make, and the detector array of baffle plate 4-2 is arranged in the growth of detector 4-1 interval
4With fiber array
1The simulation drawing of coupled apparatus.1-3 is an optical fiber.Come as can be seen, adopt such measure can reach good effect, but the growth of baffle plate 4-2 making is the technology of a quite complicated difficulty.
Fig. 4 is the fiber array of making according to the present invention
1
Embodiment
Fiber array of the present invention adopt can absorb the material upper substrate that transmits light in the optical fiber with or infrabasal plate, in location and fixed fiber, can absorb the scattered light that causes owing to end face reflection, scattering and other reasons effectively, avoid it to enter other optical-fibre channel, reduce interchannel crosstalking.Absorbing material is generally heat absorbing glass, make more convenient, also can be better and the matched coefficients of thermal expansion of optical fiber.
Fig. 1 is a kind of existing typical fiber array scheme (its stereographic map can referring to Fig. 4), and wherein 1-1 is a upper substrate, and 1-2 is the infrabasal plate of band V-type groove, and 1-3 is an optical fiber, and 1-4 is the glue of bonding usefulness.Wherein change according to operating position is different; optical fiber 1-3 can select the optical fiber of single mode or multimode for use; by the relative position between the V-type groove fixed fiber 1-3 on the infrabasal plate 1-2; upper substrate 1-1 can protect optical fiber 1-3 not sustain damage in the operation afterwards, and glue 1-4 is fixed together them.In order to locate, infrabasal plate 1-2 generally uses silicon materials, adopts photoetching and corroding method to make the V-type groove then, perhaps adopts quartz or glass material, through the machining of precision, produces the V-type groove of location usefulness.
Fig. 4 is the fiber array of making according to the present invention
1Its upper substrate 1-1 adopts at the optical attenuation glass more than the specific wavelength absorptivity arrival 10dB/mm, and infrabasal plate 1-2 adopts the V-type groove.If it is lower that the optical fiber spacing requires, can adopt the optical attenuation glass identical to make with upper substrate 1-1.The end face 1-5 of fiber array is become 7～10 degree angles by rubbing down, can plate anti-reflection film at optical fiber in order to reach better index end face.
The notable attribute of the present invention is to have adopted light absorbing material to make the upper substrate 1-1 of fiber array, infrabasal plate 1-2.This material can be absorbed in the light that transmits in the optical fiber, in protection optical fiber, reduces crosstalking between the optical-fibre channel.
Light absorbing material can be an optical attenuation glass, to the plastics of infrared Absorption, epoxy glue or the like.When selecting to be used for the light absorbing material of fiber array, should mainly should consider following problem: 1, the consistance of upper substrate and infrabasal plate and optical fiber thermal expansivity, the expansion coefficient of light absorbing material is less than 3 * 10
6/ K. 2, the absorption spectra of light absorbing material and absorptivity, the overall light absorptivity of the light absorbing material of substrate greater than 20dB less than 40dB.Generally select the light absorbing material of 7-12dB/mm for use.3, the chemical stability of light absorbing material.
In general, this light absorbing material can be selected optical attenuation glass for use, its relatively good processing, and thermal expansivity and other material of locating usefulness are more or less the same such as silicon simultaneously, can not produce very big stress when temperature changes, do not cause component failure.
If select macromolecular materials such as plastics or epoxy glue for use, its thermal expansivity can be big more a lot of than optical fiber, notice that when selecting for use hardness can not be too high, and thickness can not be too thick, in order to avoid stress is excessive, causes the fiber array warpage, even fracture.
The method for making of optical attenuation glass generally be mix or ion diffusion at the background glass material (such as quartz, K9 glass or the like) introduce metallic ion in, form absorbent core, the light that it can optionally absorb within some wavelength coverages (mainly uses wavelength to be 980nm in the communication, 1310nm, 1550nm equiwavelength's light).If require the overall absorption rate greater than more than the 20dB, for structure shown in Figure 4, select the optical attenuation glass of 10dB/mm for use, thickness 0.5mm, length 2mm just can reach the requirement of overall absorption rate.Absorptivity can not be selected De Taigao, otherwise mixes too much, and indexs such as background material coefficient of thermal expansion coefficient and refractive index all can change, even significantly degeneration of physical strength generation, causes the instability of structure.
In addition, use optical attenuation glass can also make its refractive index close with the refractive index of optical fiber, the optical fibre refractivity of the usefulness of communicating by letter can adopt the glass of refractive index between 1.4 to 1.6 as this bottom material, such as common K9 glass near 1.46.In the situation of optical fiber plating anti-reflection film, can reduce the reflection of cover plate and backplate surface like this.
Be a kind of typical application situation (Fig. 2) below:
The left side is a laser array 2, and the centre is a lens arra
3, the right is a fiber array
1, laser array
2The light that emits is through lens arra
3Convergence, concentrate on fiber array
1On, select suitable lens 3-1 and spacing can make coupling efficiency reach optimum, the spacing between the suitable increase laser instrument 2-1 can avoid the light of laser instrument partly to be coupled into adjacent fiber, causes and crosstalks.But because the mould field of laser optical is disciform, do not match with the round mould field of single-mode fiber, generally the light a that comes out from laser instrument has 60% luminous energy to be coupled among the corresponding optical fiber 1-3 at most, remaining 40% enters upper cover plate and lower cover becomes parasitic light, wherein some light b can be through repeatedly reflection, enter among the adjacent even non-adjacent optical fiber, cause crosstalking of signal, its the influence greatly about-below the 45dB,, still can the performance of system be impacted than higher occasion at ask for something.The employing absorption coefficient is 10dB/mm, thickness 0.5mm, and the optical attenuation glass of length 2mm is as after the cover plate, most of light is absorbed in cover plate, basically do not have light and enter other passage, crosstalk can be reduced to-below the 55dB, can guarantee the request for utilization of its compliance with system.
Claims (3)
1. a fiber array comprises upper and lower substrate and array fibre, it is characterized in that infrabasal plate is the V-type groove, with fibre clip between, upper substrate and infrabasal plate are to adopt the light absorbing material of 7-12dB/mm to make, the expansion coefficient of light absorbing material is less than 3 * 10
6/ K, refractive index between 1.4 to 1.6, the overall light absorptivity of upper substrate and infrabasal plate greater than 20dB less than 40dB.
2. fiber array according to claim 1 is characterized in that upper substrate and infrabasal plate are to adopt the light absorption glass material, and promptly the optical attenuation glass material is made.
3. fiber array according to claim 1 and 2 is characterized in that the equal rubbing down of upper and lower substrate end-face and fiber end face becomes 7～10 degree angles, and is coated with the anti-reflection film at the specific wavelength of optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021158428A CN1194237C (en) | 2002-05-16 | 2002-05-16 | Optical fibre array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021158428A CN1194237C (en) | 2002-05-16 | 2002-05-16 | Optical fibre array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1383011A CN1383011A (en) | 2002-12-04 |
| CN1194237C true CN1194237C (en) | 2005-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021158428A Expired - Lifetime CN1194237C (en) | 2002-05-16 | 2002-05-16 | Optical fibre array |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540338B (en) * | 2012-01-17 | 2015-06-24 | 南京春辉科技实业有限公司 | Method and device for removing jacket layer of optical fiber |
| CN103326772B (en) * | 2013-05-29 | 2016-09-14 | 武汉光迅科技股份有限公司 | A kind of miniaturization detector array |
| CN109633824B (en) * | 2019-02-21 | 2021-10-08 | 武汉光迅科技股份有限公司 | Optical fiber connector and manufacturing method thereof |
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- 2002-05-16 CN CNB021158428A patent/CN1194237C/en not_active Expired - Lifetime
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Address after: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan Patentee after: Guangxun Science-Technology Co., Ltd., Wuhan Address before: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan Patentee before: Wuhan Guangxun Science and Technology Co., Ltd. |
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