CN102944915A - Optical fiber connecting method - Google Patents
Optical fiber connecting method Download PDFInfo
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- CN102944915A CN102944915A CN2012105066824A CN201210506682A CN102944915A CN 102944915 A CN102944915 A CN 102944915A CN 2012105066824 A CN2012105066824 A CN 2012105066824A CN 201210506682 A CN201210506682 A CN 201210506682A CN 102944915 A CN102944915 A CN 102944915A
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Abstract
The invention provides an optical fiber connecting method comprising the following steps of: respectively removing small sections of coating layer on the respective ends to be connected of two sections of optical fibers to be connected to expose optical fiber cladding layers, and cutting end surfaces at the same inclined angle; placing the cut inclined end surfaces of the optical fibers to be connected in a way of clinging to complementing positions and welding the cut inclined end surfaces of the optical fibers to be connected together to finish angle welding of the optical fibers to be connected. The optical fiber connected by using the connecting method provided by the invention has the advantages that the optical feedback surface at a melting point is an inclined surface, so that reflected light returning along the original path is reduced, the optical feedback surface at the melting point hardly forms a laser resonant cavity together with other optical feedback surfaces in a system, oscillation of parasitic laser initiated by optical feedback of a low melting point can be reduced, the output power of ASE (airborne support equipment) is increased, the introduction of an optical isolator is even avoided, the loss and the cost are reduced, and the optical fiber connecting method is effectively applied to systems such as optical fiber laser and wideband superfluorescent optical fiber light source.
Description
Technical field
The present invention relates to the Fiber laser technology field, particularly a kind of method of attachment of optical fiber.
Background technology
In containing the various systems of optical fiber, low-loss between optical fiber and the optical fiber, high-quality tie point almost are inevitable existence, but because the variation of the fiber optic materials refractive index of tie point both sides, formed the bulk of optical feedback face at the tie point place, its feedback light easily causes under many circumstances the damage of device or reduces the performance of system.The widely used joints of optical fibre in the communication system according to the difference of tail optical fiber end contact mode, have two kinds of PC and APC, and the former joint coupling surface is vertical, and the impact of echo reflection be can not ignore under a lot of situations; The latter's joint coupling surface is generally the end face at 8 degree angles, therefore its echo reflection does not return along former road, and can make the part retroeflection enter covering from fibre core and leak out because not satisfying total reflection condition, return loss is than much bigger (the Jiang Shan of the connector of PC type, Liu Shuihua, Fang Luozhen, Xu Yuanzhong, " ReturnLoss in Single-Mode Fiber Joints with Bevelled Endface ", Study On Optical Communications, 71,31-37 (1994)).
In the systems such as the fiber laser of all optical fibre structure and fiber superfluorescent source, fusing point has replaced connector, the situation of only requiring the fibre core aligning with connector is different, in many instances, fusing point not only requires the aligning of fibre core, also require simultaneously the aligning of covering, and be a kind of permanent connection point place.Realize low-loss high-quality welding, generally the end face processing of optical fiber need to be got vertically smoothly, but also introduced thus the echo reflection at fusing point place and the various adverse effects of bringing thereof.
For example, as fibre optic gyroscope, optical chromatography, numerous Fibre Optical Sensors such as medical diagnosis, the desirable wideband light source of the system such as fiber-optic probe and wdm optical communication, superfluorescent fiber sources can realize that directly amplification of spontaneous emission obtains optical fiber superfluorescence seed source by pumping high-energy in doped fiber, but this system is because the existence of the bulk of optical feedback of discrete optical element or fusing point, gain very easily in the chamber that gain fibre forms, occurs self-sustained oscillation (P.Wang occurs greater than loss, J.K.Sahu, and W.A.Clarkson, " 110W double-ended ytterbium-dopedber super-fluorescent source withM2=1.6 ", Opt.Lett.31,3116-3118 (2006); Qirong Xiao, Ping Yan, Yaping Wang, Jinping Hao, and Mali Gong; " High-power all-fiber super-fluorescent source with fused angle-polishedside-pumping configuration "; Appl.Opt., 50,1164-1169 (2011)); unusually responsive to the optical signal isolation degree, therefore output power is extremely restricted.Even but full fiberize structure, also can't avoid the existence of each fusing point place return loss, this part feedback can cause laser generation, reduce laser threshold, the peak power output of restriction ASE, need to introduce optoisolator, increased loss and cost (Cao Yi, Liu Jiang, Wang Ke, Wang Pu, " All-Fiber Hundred-Watt-LevelBroadband Ytterbium-Doped Double-Cladding Fiber Superfluorescent Source ", Chin.J.Lasers., 39,0802008 (2012)).
If on the basis that guarantees low-loss welding quality, can reduce the bulk of optical feedback at fusing point place to the impact of parasitic laser generation, the raising of ASE output power therefore suffered restriction will reduce greatly, simultaneously also provide solution for the inter-stage between ASE seed source and the fiber amplifier connects existing bulk of optical feedback problem, can set up the wide band super fluorescence high-power output structure of efficient stable.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or provides at least a kind of useful commerce to select.For this reason, one object of the present invention is to propose a kind of method of attachment that reduces light Feedback Loss, lower-cost optical fiber.
Method of attachment according to the optical fiber of the embodiment of the invention may further comprise the steps: respectively with two sections optical fiber to be connected, remove the separately a bit of coat of end to be connected, expose fibre cladding, with identical oblique angle end face is cut; The oblique angle end face that cuts of described optical fiber to be connected is integrated to be close to paratope placement and welding, finishes the angle welding to described optical fiber to be connected.
In one embodiment of the invention, described optical fiber to be connected comprises any of Active Optical Fiber and passive fiber at least.
In one embodiment of the invention, described optical fiber to be connected comprises any in single-mode fiber, multimode optical fiber or the photonic crystal fiber at least.
In one embodiment of the invention, in the angle cutting process of described optical fiber to be connected, the oblique angle of cutting is 0-90 °.
In one embodiment of the invention, the angle cutting method of described optical fiber to be connected replaces with the method for sanding and polishing.
In one embodiment of the invention, the fusion weld method of described optical fiber to be connected replaces with the gluing method of optics.
The present invention has the following advantages owing to taking above technical scheme:
1. be close to complimentary fashion and couple together with the cutting of identical oblique angle, end face, surface of contact and vertical direction have certain angle, can reduce the reflected light that former road is returned, the bulk of optical feedback inclined-plane that forms is difficult for and other reflectings surface directly consist of laserresonator, if use at the wide band super fluorescence optical fiber source, the respective limits that the feedback light that can reduce the fusing point place is subject to impact and the ASE output power of parasitic laser generation.
2. after carrying out identical angle cutting, welding is to be close to complementary mode with two end faces to carry out, and can guarantee the welding quality, can not introduce the increase of splice loss, splice attenuation.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is angle connection diagram of the present invention;
Fig. 2 is the embodiment that the present invention is used for optical fiber superfluorescence seed source;
Fig. 3 is the embodiment that the present invention is used for the inter-stage tie point between optical fiber superfluorescence seed source and the fiber amplifier.
Among the figure, the coat of 1 optical fiber a to be connected, the covering of 2 optical fiber a to be connected, the fibre core of 3 optical fiber a to be connected, the oblique angle end face of 4 optical fiber a to be connected, the coat of 5 optical fiber b to be connected, the covering of 6 optical fiber b to be connected, 7 bands connect the fibre core of optical fiber b, the oblique angle end face of 8 optical fiber b to be connected, and 4 and 8 are to be close to behind the diagram paratope and are fused into one again; 9 first semiconductor lasers, 10 first (n+1) x1 pump combiner, 11 first angle fusion points, 12 first doped gain fiber, 13 pump lights are revealed device, 14 second semiconductor lasers, 15 second (n+1) x1 pump combiner, 16 second angle fusion points, 17 second doped gain fiber, 18 angle welding inter-stage tie points.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center "; " vertically "; " laterally "; " length "; " width "; " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that the First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under the Second Characteristic and tiltedly, or only represent that the First Characteristic level height is less than Second Characteristic.
Method of attachment according to the optical fiber of the embodiment of the invention may further comprise the steps: respectively with two sections optical fiber to be connected, remove the separately a bit of coat of end to be connected, expose fibre cladding, with identical oblique angle end face is cut; The oblique angle end face that cuts of optical fiber to be connected is integrated to be close to paratope placement and welding, finishes the angle welding to optical fiber to be connected.
Adopt this angle welding mode, the bulk of optical feedback face at fusing point place is the inclined-plane, reduced the reflected light that former road is returned, and other bulk of optical feedback face formation laserresonator in difficult and the system, in the systems such as optical-fiber laser and wide band super fluorescence optical fiber source, have effective application.The essential fusing point in the fiber superfluorescent source for example, and the inter-stage tie point between seed source and the amplifier, after adopting the angle fusion techniques, low-melting bulk of optical feedback can be fallen to the initiation of parasitic laser generation, improve the output power of ASE, even avoid the introducing of optical isolator, reduce the wastage and cost.
In one embodiment of the invention, optical fiber to be connected comprises any of Active Optical Fiber and passive fiber at least.
In one embodiment of the invention, optical fiber to be connected comprises any in single-mode fiber, multimode optical fiber or the photonic crystal fiber at least.
In one embodiment of the invention, in the angle cutting process of optical fiber to be connected, the oblique angle of cutting is 0-90 °.
In one embodiment of the invention, the angle cutting method of optical fiber to be connected replaces with the method for sanding and polishing.
In one embodiment of the invention, the fusion weld method of optical fiber to be connected replaces with the gluing method of optics.
For making those skilled in the art understand better the present invention, the invention will be further described below in conjunction with diagram, grins but be not limited only to following enforcement.
Embodiment 1:
As shown in Figure 2, this example is the embodiment that the inventive method is used for optical fiber superfluorescence seed source.The wide band super fluorescence seed source is made of semiconductor laser 9, (n+1) x1 pump combiner 10, angle fusion point 11, Yb-doped double-cladding optical fiber 12.Semiconductor laser 9 is as pumping source, its tail optical fiber is connected to the input fibre of (n+1) x1 pump combiner 10, (n+1) output terminal of x1 pump combiner 10 couples together with the mode of angle fusion weld and an end of Yb-doped double-cladding optical fiber 12,11 are angle fusion weld contact, the other end of Yb-doped double-cladding optical fiber 12 and (n+1) signal end of x1 pump combiner 10 all cut into 8 the degree angles as the superfluorescent output terminal of optical fiber.Because (n+1) x1 pump combiner 10 connection of being connected with Yb-doped double-cladding optical fiber is to carry out in angle welding mode, therefore the vertical reflection face is compared on the bulk of optical feedback inclined-plane at fusion point 11 places, reduced time reflective, and be difficult for and structure in other reflecting surface form laserresonator, the respective limits that the feedback light that has reduced the fusing point place is subject to impact and the ASE superfluorescence output power of parasitic laser generation.
Embodiment 2:
As shown in Figure 3, this example is the embodiment that the inventive method is used for optical fiber superfluorescence seed source and amplifier thereof, and the master oscillation power amplification MOPA structure of employing mainly comprises wide band super fluorescence seed source and fiber optic power amplifier two parts.The wide band super fluorescence seed source is revealed device 13 by the first semiconductor laser 9, first (n+1) x1 pump combiner 10, the first angle fusion point 11, the first Yb-doped double-cladding optical fiber 12 and pump light and is consisted of.Wherein the first semiconductor laser 9 is as pumping source, its tail optical fiber is connected to the input fibre of first (n+1) x1 pump combiner 10, the output terminal of first (n+1) x1 pump combiner 10 couples together with the mode of angle fusion weld and an end of the first Yb-doped double-cladding optical fiber 12,11 are the first angle fusion weld contact, the other end of the first Yb-doped double-cladding optical fiber 12 cuts into 8 degree angles, the signal termination pump light of first (n+1) x1 pump combiner 10 is revealed device 13, and pump light is revealed the other end output superfluorescence of device 13 as seed light.Because first (n+1) x1 pump combiner 10 is to carry out in angle welding mode with being connected the connection of Yb-doped double-cladding optical fiber 12, therefore the vertical reflection face is compared on the bulk of optical feedback inclined-plane at fusion point 11 places, reduced time reflective, and be difficult for and structure in other reflecting surface form laserresonator, the respective limits that the feedback light that has reduced the fusing point place is subject to impact and the ASE superfluorescence output power of parasitic laser generation.
Fiber optic power amplifier has and the similar structure of above-mentioned superfluorescence seed source, mainly is made of the second semiconductor laser 14, second (n+1) x1 pump combiner 15, the second angle fusion point 16 and the second Yb-doped double-cladding optical fiber 17.Wherein the second semiconductor laser 14 is as pumping source, its tail optical fiber is connected to the input fibre of second (n+1) x1 pump combiner 15, the output terminal of second (n+1) x1 pump combiner 15 couples together with the mode of angle fusion weld and an end of the first Yb-doped double-cladding optical fiber 17,16 are the second angle fusion weld contact, and the other end of the second Yb-doped double-cladding optical fiber 12 cuts into 8 degree angles and is dipped in the index-matching fluid as output terminal.
The output terminal of the output terminal of superfluorescence seed source---the pump light leakage device (13) in this example is connected to the signal end of second (n+1) x1 pump light bundling device in the mode of angle fusion weld, the inter-stage tie point (18) that forms is the angle fusion point, its bulk of optical feedback face is the inclined-plane, compare the vertical reflection face, reduced time reflective, and other reflectings surface in very difficult and the system consist of laserresonators, very large reduction the impact on parasitic laser generation of fusing point feedback, improved the output efficiency of ASE, made seed light enter the amplification that output power behind the fiber optic power amplifier obtains further efficient stable.
The method of attachment of optical fiber of the present invention has the following advantages at least:
1. be close to complimentary fashion and couple together with the cutting of identical oblique angle, end face, surface of contact and vertical direction have certain angle, can reduce the reflected light that former road is returned, the bulk of optical feedback inclined-plane that forms is difficult for and other reflectings surface directly consist of laserresonator, if use at the wide band super fluorescence optical fiber source, the respective limits that the feedback light that can reduce the fusing point place is subject to impact and the ASE output power of parasitic laser generation.
2. after carrying out identical angle cutting, welding is to be close to complementary mode with two end faces to carry out, and can guarantee the welding quality, can not introduce the increase of splice loss, splice attenuation.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art is not in the situation that break away from principle of the present invention and aim can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (6)
1. the method for attachment of an optical fiber is characterized in that, may further comprise the steps:
With two sections optical fiber to be connected, remove the separately a bit of coat of end to be connected respectively, expose fibre cladding, with identical oblique angle end face is cut;
The oblique angle end face that cuts of described optical fiber to be connected is integrated to be close to paratope placement and welding, finishes the angle welding to described optical fiber to be connected.
2. the method for attachment of a kind of optical fiber according to claim 1 is characterized in that, described optical fiber to be connected comprises any of Active Optical Fiber and passive fiber at least.
According to claim 1 with the method for attachment of 2 described a kind of optical fiber, it is characterized in that, described optical fiber to be connected comprises any in single-mode fiber, multimode optical fiber or the photonic crystal fiber at least.
4. the method for attachment of a kind of optical fiber according to claim 4 is characterized in that, in the angle cutting process of described optical fiber to be connected, the oblique angle of cutting is 0-90 °.
5. the method for attachment of described a kind of optical fiber is characterized in that according to claim 1-4, and the angle cutting method of described optical fiber to be connected replaces with the method for sanding and polishing.
6. the method for attachment of described a kind of optical fiber is characterized in that according to claim 1-4, and the fusion weld method of described optical fiber to be connected replaces with the gluing method of optics.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103230260A (en) * | 2013-05-07 | 2013-08-07 | 深圳市中科微光医疗器械技术有限公司 | Ultra-miniature optical coherence tomography probe with gradient-refractive-index lens |
| CN104197924A (en) * | 2014-09-16 | 2014-12-10 | 北京航空航天大学 | Melting-point-free interference full photonic bandgap optical fiber gyro |
| CN104297849A (en) * | 2014-11-06 | 2015-01-21 | 成磊 | Welding method for photonic crystal fibers |
| CN104713542A (en) * | 2013-12-11 | 2015-06-17 | 中国航空工业第六一八研究所 | Non-fusion making method of high precision optical fiber gyroscope |
| CN106016171A (en) * | 2016-07-14 | 2016-10-12 | 南京信息职业技术学院 | Optical fiber condenser |
| CN106796361A (en) * | 2014-10-15 | 2017-05-31 | 奥普托塞斯股份有限公司 | For the device of transmitting and its detection of polarised light |
| CN109642990A (en) * | 2016-08-25 | 2019-04-16 | 住友电气工业株式会社 | The manufacturing method of optical connector and optical connector |
| CN110426787A (en) * | 2019-07-04 | 2019-11-08 | 苏州安捷讯光电科技股份有限公司 | A kind of band decaying Non-contact optical fiber circuit device and preparation method thereof |
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| CN1564954A (en) * | 2001-10-04 | 2005-01-12 | 泰科电子雷伊化学有限公司 | Method and apparatus for splicing optical fibres |
| CN101975977A (en) * | 2005-04-22 | 2011-02-16 | 日新技术株式会社 | Portable opitcal-fiber processing equipment |
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| US6048102A (en) * | 1995-11-20 | 2000-04-11 | Fujitsu Limited | Optical connector which provides a disconnection state between two optical fibers where light is totally reflected at an end face of one fiber |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230260A (en) * | 2013-05-07 | 2013-08-07 | 深圳市中科微光医疗器械技术有限公司 | Ultra-miniature optical coherence tomography probe with gradient-refractive-index lens |
| CN104713542A (en) * | 2013-12-11 | 2015-06-17 | 中国航空工业第六一八研究所 | Non-fusion making method of high precision optical fiber gyroscope |
| CN104713542B (en) * | 2013-12-11 | 2017-07-25 | 中国航空工业第六一八研究所 | A kind of high-precision optical fiber gyro weldless preparation method |
| CN104197924A (en) * | 2014-09-16 | 2014-12-10 | 北京航空航天大学 | Melting-point-free interference full photonic bandgap optical fiber gyro |
| CN106796361A (en) * | 2014-10-15 | 2017-05-31 | 奥普托塞斯股份有限公司 | For the device of transmitting and its detection of polarised light |
| CN104297849A (en) * | 2014-11-06 | 2015-01-21 | 成磊 | Welding method for photonic crystal fibers |
| CN104297849B (en) * | 2014-11-06 | 2017-04-19 | 成磊 | Welding method for photonic crystal fibers |
| CN106016171A (en) * | 2016-07-14 | 2016-10-12 | 南京信息职业技术学院 | Optical fiber condenser |
| CN109642990A (en) * | 2016-08-25 | 2019-04-16 | 住友电气工业株式会社 | The manufacturing method of optical connector and optical connector |
| CN110426787A (en) * | 2019-07-04 | 2019-11-08 | 苏州安捷讯光电科技股份有限公司 | A kind of band decaying Non-contact optical fiber circuit device and preparation method thereof |
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Application publication date: 20130227 |