CN104181644B - Alignment tools, alignment methods, fiber stub assembly and the joints of optical fibre - Google Patents
Alignment tools, alignment methods, fiber stub assembly and the joints of optical fibre Download PDFInfo
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- CN104181644B CN104181644B CN201310226188.7A CN201310226188A CN104181644B CN 104181644 B CN104181644 B CN 104181644B CN 201310226188 A CN201310226188 A CN 201310226188A CN 104181644 B CN104181644 B CN 104181644B
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Abstract
Disclosure one alignment tools, for calibrating optical fiber position in the optical fiber through hole of porous optical fiber lock pin, wherein, described alignment tools includes high accuracy alignment guide element and high-precision optical fiber position alignment element, described fiber stub is docked with described alignment tools by high accuracy alignment guide element, and during multifiber is each passed through multiple optical fiber through holes of fiber stub and is inserted into multiple calibration holes of high-precision optical fiber position alignment element, for making optical fiber positional precision in the optical fiber through hole of fiber stub reach optical fiber positional precision in the calibration hole of high-precision optical fiber position alignment element, thus producing the high-precision joints of optical fibre with low-precision optical fiber lock pin, reduce manufacturing cost.Invention additionally discloses a kind of alignment methods, and adopt the precision that this alignment tools and alignment methods produce to meet or exceed the high-precision optical fiber adapter of single-mode optical fiber connector.
Description
Technical field
The invention belongs to joints of optical fibre field, the present invention relates to one and (include conventional single-core fiber, multicore single fiber, the many optical fiber of bunchy or many fibre bundles for calibrating optical fiber, presents " optical fiber " mentioned below has and indicates that contain identical refers to meaning herein) alignment tools of position in the optical fiber through hole of multi-core fiber lock pin (have porous, hold multifiber) and alignment methods and the fiber stub assembly produced by this alignment tools and alignment methods and the joints of optical fibre.Specifically, the present invention proposes a kind of use and (has bigger optical fiber through-hole aperture and bias based on the lock pin of low precision, specification such as similar multimode lock pin or requirement lower than multimode lock pin) manufacture the novel technique of low cost, high-performance (low insertion loss), easily operated single-mode optical fiber connector, revolutionize single-mode optical fiber connector and must use the prior art of high accuracy lock pin (the adapter of ultra-low loss uses the ultrahigh precision single mode lock pin of high cost).
Background technology
It is applied to the lock pin of the joints of optical fibre, also known as pin body.Lock pin is the core component of the joints of optical fibre, and it is a kind of high precision components by precision processing technology.In joints of optical fibre manufacturing process, generally adopt the optical fiber through hole that stripping the traverse of clean bare fibre are full of glue, then make glue curing, optical fiber is fixed in lock pin, then make required optical fiber connector via a series of programs such as polishing, polishing, tests.Owing to all manufacture processes can produce inevitable error and has been artificially induced tolerance in order to dimensional fits/assembling needs, such as, optical fiber through-hole diameter is greater than fibre external diameters so that optical fiber can penetrate in optical fiber through hole, such fibre external diameters and optical fiber clear size of opening need there is inborn deviation, for another example, not concentric and optical fiber through hole is there is and there is processing and manufacturing error etc. with alignment fiducials (multi-core fiber lock pin adapter is primarily referred to as and is directed at pin hole) in optical fiber axle center and optical fiber through hole with space, these factors all can cause the lateral shift in optical fiber axle center, thus insertion loss when affecting joints of optical fibre docking.
Owing to the mode field diameter of single-mode fiber is more much smaller than the mode field diameter of multimode fibre (for most of optical fiber communications, it is about the relation of 1/5 to 1/6, such as, the representative diameter of the fibre core of the single-mode fiber of standard is about 9 μm, the diameter of the fibre core of the multimode fibre of standard is generally 50 μm or 62.5 μm), therefore, the alignment precision of single-mode fiber requires to be significantly larger than the alignment precision requirement to multimode fibre, so, the lock pin precision that single-mode optical fiber connector uses to be significantly larger than the lock pin precision that multimode fibre adapter uses.
The relative dimensions of lock pin is required mainly to require significantly high in positional precision precision relative to alignment guidance pin hole of lock pin optical fiber through-hole diameter precision and optical fiber through hole and the quality of fit of a pair alignment guidance pin hole that matches each other by single mode porous optical fiber lock pin, below by dimension precision requirement in the following aspects of contrast single mode lock pin and multimode lock pin:
1) alignment guidance pin hole quality of fit
Single mode: lock pin alignment guidance pin diameter accuracy is generally +/-0.0005mm, the guiding pin hole internal diameter precision of coupling is +/-0.001mm；To low-loss requirement, the required precision of alignment guidance pin diameter reaches +/-0.0001mm；The guiding pin hole internal diameter precision simultaneously mated is +/-0.0003mm；
Multimode: the guiding pin hole internal diameter precision of lock pin alignment guidance pin diameter accuracy and coupling is +/-0.001mm.
2) lock pin optical fiber through-hole diameter:
Single mode: lock pin optical fiber through-hole diameter required precision, at +/-0.00075mm, even requires +/-0.0003mm for low-loss single mode lock pin optical fiber clear size of opening；
Multimode: lock pin optical fiber through-hole diameter required precision is at +/-0.001mm.
3) positional precision of lock pin optical fiber through hole and alignment guidance pin hole:
Single mode: positional precision generally requires to reach 0.003mm, for low-loss single mode lock pin, position accuracy demand is even up to 0.0018mm；
Multimode: positional precision generally requires to reach 0.006mm.
In order to ensure to guarantee that single-mode optical fiber connector reaches industry standard index of correlation requirement in the fabrication process, field is manufactured at present at the joints of optical fibre, being generally directed to list, multimode fibre and use the lock pin of different accuracy requirement respectively, namely multimode fibre adapter lock pin and single-mode optical fiber connector lock pin are distinguish between.Single mode/its outward appearance of multimode lock pin that the joints of optical fibre use, structure seems identical, but the relative dimensions of lock pin is required significantly high by single mode lock pin, especially lock pin optical fiber through-hole aperture size and high with the position accuracy demand being directed between guide hole (generally will within 3 microns, in order to meet ultralow insertion loss when docking connects, precision even to control in submicron rank), the most direct result of high-precision requirement is, the high of single mode lock pin cost/price causes that the cost of single mode connector is high, especially prominent for ultra-low loss multi-core fiber lock pin adapter, the lock pin cost of single mode and multimode is almost the difference of several times.
As it has been described above, according to prior art, it is impossible to use the multimode lock pin of low precision to produce high-precision single-mode optical fiber connector lock pin.
Summary of the invention
The purpose of the present invention aims to solve the problem that at least one aspect of the above-mentioned problems in the prior art and defect.
It is an object of the present invention to provide one and (include conventional single-core fiber, multicore single fiber, bunchy multi-fiber or many fibre bundles for calibrating optical fiber, presents " optical fiber " mentioned below has and indicates that identical finger theed contain is anticipated herein) (there is porous at porous optical fiber lock pin, hold multifiber) in the alignment tools of position, it can improve optical fiber positional precision in the optical fiber through hole of fiber stub so that it is meets or exceeds the positional precision in the optical fiber through hole of single mode lock pin.
A kind of alignment methods for calibrating optical fiber position in the fiber stub of low precision of offer is provided, it can improve optical fiber positional precision in the optical fiber through hole of fiber stub so that it is meets or exceeds the positional precision in the optical fiber through hole of single mode lock pin.
According to an aspect of the present invention, a kind of alignment tools is provided, for calibrating optical fiber position in the optical fiber through hole of fiber stub, wherein, described alignment tools includes high accuracy alignment guide element and high-precision optical fiber position alignment element, described fiber stub is docked with described alignment tools by high accuracy alignment guide element, and during multifiber is each passed through multiple optical fiber through holes of fiber stub and is inserted into multiple calibration holes of high-precision optical fiber position alignment element, for making optical fiber positional precision in the optical fiber through hole of fiber stub reach optical fiber positional precision in the calibration hole of high-precision optical fiber position alignment element.
According to an example of the present invention embodiment, the precision of described fiber stub is equal to or less than the precision of the multimode lock pin of standard；And the precision of described high-precision optical fiber position alignment element is equal to or higher than the precision of the single mode lock pin of standard.
Another example embodiments according to the present invention, described high accuracy alignment guide element is high accuracy guid needle instrument, and described high accuracy guid needle instrument flatly extends forward from the end face of high-precision optical fiber position alignment element；And described high accuracy alignment guide element inserts in the corresponding alignment guide hole of described fiber stub, for the axis making the alignment guide hole of described fiber stub and the axis alignment being directed at guide element in high precision, so that the axis of the multiple optical fiber penetrated in multiple optical fiber through holes of fiber stub is directed at the axis of multiple calibration holes of described high-precision optical fiber position alignment element respectively.
Another example embodiments according to the present invention, described high-precision optical fiber position alignment element is the ultraprecise lock pin instrument that precision exceedes single mode lock pin.
Another example embodiments according to the present invention, when calibration, the end face of described high-precision optical fiber position alignment element and described fiber stub is predetermined distance.
Another example embodiments according to the present invention, when calibration, the part in the calibration hole being inserted into described high-precision optical fiber position alignment element of described optical fiber has predetermined length.
Another example embodiments according to the present invention, described alignment tools also includes: clamping device, for described fiber stub and described high-precision optical fiber position alignment element being kept together.
Another example embodiments according to the present invention, described clamping device is clamping shell fragment.
Another example embodiments according to the present invention, described clamping device is screw clamp.
Another example embodiments according to the present invention, described screw clamp includes: housing, there is the holding tank extended between first end and the second end of housing, fiber stub and high-precision optical fiber position alignment element are contained in this holding tank, and fiber stub is resisted against on the inwall of the first end of housing；Pushing block, is contained in the holding tank of housing, and between high-precision optical fiber position alignment element and the second end of housing；And threaded rod, fit through in the holding tank that this screwed hole enters housing with the screwed hole on the end wall of the second end of housing, wherein, promote pushing block by rotating threaded rod, thus pushing high-precision optical fiber position alignment element and fiber stub, both are kept together.Another example embodiments according to the present invention, described alignment tools also includes: Separation control part, it is arranged between the end face of fiber stub and high-precision optical fiber position alignment element, is used for controlling the distance between fiber stub and the end face of high-precision optical fiber position alignment element during calibration.
Another example embodiments according to the present invention, described high accuracy alignment guide element traverse Separation control part.
Another example embodiments according to the present invention, the multiple calibration holes on described high-precision optical fiber position alignment element are arranged in a row or multiple rows of；And described alignment tools includes a pair high accuracy and is directed at guide element, the pair of high accuracy alignment guide element is symmetrically arranged at the both sides of a row or multi-row calibration hole.
Another example embodiments according to the present invention, described high-precision optical fiber position alignment element is the integral element only formed by parts, and described calibration hole is circular port or the feature holes meeting optical fiber external form special shape.
Another example embodiments according to the present invention, described high-precision optical fiber position alignment element is the split type element formed by the parts of at least two independence.
Another example embodiments according to the present invention, described high-precision optical fiber position alignment element includes: pedestal, is formed with a recess in described pedestal, and row's calibration hole is formed on the diapire of recess；And briquetting, described briquetting is placed in the recess of described pedestal, for being maintained in calibration hole by the optical fiber inserting calibration hole.
Another example embodiments according to the present invention, described calibration hole is U-type groove hole or V-groove hole.
According to another aspect of the present invention, it is provided that a kind of alignment methods for calibrating optical fiber position in the optical fiber through hole of fiber stub, described method comprises the steps:
S100: provide an independent alignment tools, the precision of described alignment tools is higher than the precision of fiber stub；With
S200: use alignment tools calibration optical fiber position in the optical fiber through hole of fiber stub.
According to an example of the present invention embodiment, described alignment tools is aforementioned alignment tools.
Another example embodiments according to the present invention, described step S200 comprises the following steps:
S201: by high accuracy alignment guide element, described fiber stub and described alignment tools are docking together, and with clamping device, described fiber stub and described alignment tools are kept together；With
S202: in multiple optical fiber through holes that multifiber is each passed through fiber stub the multiple calibration holes being inserted into high-precision optical fiber position alignment element, for making optical fiber positional precision in the optical fiber through hole of fiber stub reach optical fiber positional precision in the calibration hole of high-precision optical fiber position alignment element.
Another example embodiments according to the present invention, the optical fiber through hole of described fiber stub is filled with glue or equivalent curable body, for being fixed on by described optical fiber in the optical fiber through hole of described fiber stub, described glue was filled in the optical fiber through hole of fiber stub before or after optical fiber inserts the optical fiber through hole of fiber stub.
Another example embodiments according to the present invention, further comprises the steps of: after step S200
S300: optical fiber is fixed in fiber stub by solidified glue.
Another example embodiments according to the present invention, is provided with Separation control part between the end face of fiber stub and high-precision optical fiber position alignment element, for controlling the distance between fiber stub and the end face of high-precision optical fiber position alignment element when calibration.
Another example embodiments according to the present invention, when calibration, the end face of described high-precision optical fiber position alignment element and described fiber stub is predetermined distance.
Another example embodiments according to the present invention, when calibration, the part in the calibration hole being inserted into described high-precision optical fiber position alignment element of described optical fiber has predetermined length.
According to another aspect of the present invention, it is provided that a kind of fiber stub assembly, including the multifiber of fiber stub He the multiple optical fiber through holes being arranged in fiber stub, wherein, described fiber stub assembly utilizes aforementioned alignment tools and/or aforementioned alignment methods to make.
According to an example of the present invention embodiment, after the calibration, insert described fiber stub optical fiber through hole optical fiber relative to described fiber stub alignment guide hole positional precision at 0～0.002mm.
Another example embodiments according to the present invention, the diameter dimension tolerance of the alignment guide hole of described fiber stub is at-0.001mm～0.001mm.
Another example embodiments according to the present invention, the diameter dimension tolerance of the optical fiber through hole of described fiber stub is at 0.000mm～0.030mm.
Another example embodiments according to the present invention, the diameter dimension tolerance of the alignment guide hole of described fiber stub is at-0.001mm～0.001mm；And the diameter dimension tolerance of the optical fiber through hole of described fiber stub is at 0.000mm～0.030mm.
Another example embodiments according to the present invention, after being fixed in the optical fiber through hole of fiber stub by glue by optical fiber, the maximum spacing between the internal face of the optical fiber through hole of described fiber stub and the outer peripheral face of described optical fiber is more than or equal to the axle center of the described optical fiber position deviation in theoretical axle center relative to the determined corresponding optical fiber in axle center by the alignment guide hole of described fiber stub.
According to another aspect of the present invention, it is provided that a kind of joints of optical fibre, wherein, the described joints of optical fibre include aforementioned fiber stub assembly.
According to another aspect of the present invention, a kind of joints of optical fibre are provided, the low-precision optical fiber lock pin of the multimode lock pin of standard is equaled to or less than including precision, wherein, in the fabrication process, utilize aforementioned alignment tools and/or aforementioned alignment methods that optical fiber position in the optical fiber through hole of low-precision optical fiber lock pin is calibrated, so that the positional precision that optical fiber is in the optical fiber through hole of low-precision optical fiber lock pin meets or exceeds the positional precision in the optical fiber through hole of the single mode lock pin of standard, and after the calibration, optical fiber is fixed in low-precision optical fiber lock pin, so that the precision of the joints of optical fibre produced meets or exceeds the precision of the single-mode optical fiber connector of standard.
According to an example of the present invention embodiment, described optical fiber is conventional single-core fiber.
Another example embodiments according to the present invention, described optical fiber is the multicore fiber including multiple fibre core.
Another example embodiments according to the present invention, described optical fiber is the bundled optical fibers including multifiber.
The present invention is compared with prior art distinctive in that, single-mode fiber is placed in the optical fiber through hole of fiber stub of low precision, space between optical fiber through hole and the optical fiber of low precision lock pin can much larger than the space (space filled by glue and solidified make optical fiber be fixed in optical fiber through hole) between the high accuracy single mode lock pin and the optical fiber that use in prior art, and the optical fiber head end protruding from insertion core end face is led in the calibration hole of independent high-precision optical fiber position alignment element, optical fiber position in the fiber stub of low precision is carried out close adjustment, and fix it in the low-precision optical fiber lock pin of system, thus producing high accuracy adapter.
The technique broken through based on this invention and instrument, it is achieved that use the ferrule assembly of low precision to make the single-mode optical fiber connector of high-performance (low insertion loss), low cost.Based on the joints of optical fibre that this inventive technique makes, compared with the existing adapter using high accuracy lock pin to make, have better the controllability of positional precision of optical fiber processed, predictability, individuality to individuality precision reproducibility, so substantially increase performance and the interaction (low insertion loss and low random interworking insertion loss) at random of adapter.
For porous/multi-core fiber lock pin adapter (such as MT), the most basic functional packet of high-precision alignment tools alignment containing high accuracy guides unit's (such as high accuracy guid needle instrument) and two Partial Feature compositions of fiber position high-precision calibration unit (such as ultraprecise porous lock pin instrument), it is respectively intended to, to quasi-fiber through hole and calibration multifiber position in optical fiber through hole, make the deviation of both physical axis drop to submicron rank.
Above-mentioned two parts feature can form suite of tools by two or more assembling parts, it is possible to is designed to the tool piece of integration.
The present invention utilizes novel technique to achieve multimode lock pin production low cost, the low-loss high-quality single-mode optical fiber connector part adopting low precision.
By below with reference to accompanying drawing description made for the present invention, other purpose of the present invention and advantage will be apparent to, and can help the present invention is fully understood by.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the alignment tools for manufacturing porous optical fiber lock pin of the first example embodiments according to the present invention；
Fig. 2 is the schematic diagram of the alignment tools shown in Fig. 1, wherein demonstrates clamping device and the Separation control part of alignment tools；
Fig. 2 A is the schematic diagram of the another kind of embodiment of the clamping device being applicable to the alignment tools shown in Fig. 1；
Fig. 3 is the schematic perspective view of the alignment tools shown in Fig. 1 and Fig. 2 and Fig. 2 A；
Fig. 4 is the schematic perspective view of the high-precision optical fiber position alignment element of alignment tools according to the second embodiment of the present invention；
Fig. 5 is the end view of the alignment tools shown in Fig. 4；
Fig. 6 is the schematic perspective view of the high-precision optical fiber position alignment element of alignment tools according to the third embodiment of the invention；
Fig. 7 is the end view of the alignment tools shown in Fig. 6；
Fig. 8 shows the partial view of the end face of the porous in Fig. 1/multi-core fiber lock pin 300；
Fig. 9 shows the schematic diagram of the another kind of optical fiber according to the present invention；
Figure 10 shows the schematic perspective view of many loose optical fiber；
Figure 11 shows the end view of the loose optical fiber of many in Figure 10；
Figure 12 shows that the loose optical fiber of many in Figure 10 and Figure 11 is calibrated the schematic perspective view of the bundled optical fibers being subsequently formed in the calibration hole of the present invention；With
Figure 13 shows the end view of the bundled optical fibers that the calibration in Figure 12 is subsequently formed.
Detailed description of the invention
By the examples below, and in conjunction with accompanying drawing, technical scheme is described in further detail.In the description, same or analogous drawing reference numeral indicates same or analogous parts.Following it is intended to the explanation of embodiment of the present invention with reference to accompanying drawing the present general inventive concept of the present invention is made an explanation, and is not construed as a kind of restriction to the present invention.
Fig. 1 is the schematic diagram of the alignment tools for manufacturing porous optical fiber lock pin 300 of the first example embodiments according to the present invention.Fig. 2 is the schematic diagram of the alignment tools shown in Fig. 1, wherein demonstrates clamping device and the Separation control part of alignment tools.Fig. 3 is the schematic perspective view of the alignment tools shown in Fig. 1 and Fig. 2.
As shown in Figure 1, Figure 2 and Figure 3, fiber stub is the porous optical fiber lock pin 300 being applicable to multi-fiber connector, and high-precision optical fiber position alignment element 200 is the high-precision optical fiber position correction element suitable in multiple fiber optical connector.
In the embodiment shown in Fig. 1, Fig. 2 and Fig. 3, the precision of porous optical fiber lock pin 300 can equal to or less than the precision of the multimode lock pin of standard, the precision of high-precision optical fiber position alignment element 200 can equal to or higher than the precision of the single mode lock pin of standard, and the diameter of optical fiber 400 can equal to or less than the diameter of the single-mode fiber of standard.In this manner it is possible to the alignment tools of the application of the invention and alignment methods, produce the high-precision fiber insertion core of the required precision reaching single mode lock pin with the multimode lock pin of low precision.
Fig. 1, Fig. 2 and Fig. 3 shown in embodiment in, alignment tools include high accuracy alignment guide element 100.In the illustrated embodiment, high accuracy alignment guide element 100 is a pair high accuracy alignment guid needle instrument, and the pair of high accuracy alignment guid needle instrument is formed on the end face of high-precision optical fiber position alignment element 200 and flatly extends forward.The end face of porous optical fiber lock pin 300 is formed and is directed at, with a pair high accuracy, a pair alignment guide hole (not shown) that guide element 100 is corresponding.The high accuracy alignment guide element 100 of high-precision optical fiber position alignment element 200 inserts in the corresponding alignment guide hole of porous optical fiber lock pin 300, for the axis making alignment guide hole and the axis alignment being directed at guide element 100 in high precision, so that the axis of the multifiber 400 penetrated in multiple optical fiber through holes (sign) of porous optical fiber lock pin 300 is directed at the axis of multiple calibration holes 201 of high-precision optical fiber position alignment element 200 respectively, thus ensureing the optical fiber 400 positional precision relative to alignment guide hole in the optical fiber through hole of porous optical fiber lock pin 300.
Glue or the equivalent curable body of fixing optical fiber can be preset in the optical fiber through hole of porous optical fiber lock pin 300, it is also possible to be filled in the space between the optical fiber through hole of optical fiber 400 and porous optical fiber lock pin 300 after optical fiber 400 is aligned and collimates by injection way and/or capillarity from rear end.
Owing to having the glue of spilling at porous optical fiber lock pin 300 end face processed, this end face can not with fiber position truing tool end contact, therefore, in the embodiment shown in Figure 2, when high-precision optical fiber position alignment element 200 and porous optical fiber lock pin 300 are docking together, the end face of high-precision optical fiber position alignment element 200 and porous optical fiber lock pin 300 is predetermined distance.
As depicted in figs. 1 and 2, alignment tools includes Separation control part 610, this Separation control part 610 is arranged between the end face of porous optical fiber lock pin 300 and high-precision optical fiber position alignment element 200, is used for controlling the distance between porous optical fiber lock pin 300 and the end face of high-precision optical fiber position alignment element 200 during calibration.As it is shown in figure 1, high accuracy alignment guide element 100 traverse Separation control part 610.
All directly affect calibration effect and technology difficulty owing to the clearance distance between high-precision optical fiber position alignment element 200 and the end face of fiber stub 300 and optical fiber 400 penetrate the fiber lengths in the calibration hole 201 of high-precision optical fiber position alignment element 200, therefore need the fiber lengths effectively controlling in the calibration hole 201 of fiber position truing tool and the distance between multimode insertion core end face processed and insertion high-precision optical fiber position alignment element 200 in force.In order to ensure the positional precision of optical fiber, when calibration, the part in the calibration hole 201 being inserted into high-precision optical fiber position alignment element 200 of optical fiber 400 should have predetermined length.
As depicted in figs. 1 and 2, fiber stub 300 is docking together with high-precision optical fiber position alignment element 200 by high accuracy alignment guide element 100, in order to make fiber stub 300 and high-precision optical fiber position alignment element 200 be reliably held at mated condition, therefore, as in figure 2 it is shown, also need to add a clamping device to provide retentivity in docking operation.
In shown in Fig. 2 a exemplary embodiment, clamping device is clamping shell fragment 700, and high-precision optical fiber position alignment element 200 and fiber stub 300 are clamped together by this clamping shell fragment 700, thus providing retentivity.
But, the present invention is not limited to this, and clamping device can also be screw clamp (not shown), for instance, promote catch high-precision optical fiber position alignment element 200 and fiber stub 300 to be clamped together by rotating screw.
Such as, Fig. 2 A shows the schematic diagram being applicable to that the alignment tools shown in Fig. 1 is maintained at the another kind of embodiment of the clamping device of mated condition.
As shown in Figure 2 A, this clamping device is a screw clamp, and it mainly includes housing 10, threaded rod 20 and pushing block 30.As shown in Figure 2 A, it is formed with a holding tank 14 in the housing 10, this holding tank 14 extends between the first end 11 and second end 12 of housing 10, the fiber stub 300 and the high-precision optical fiber position alignment element 200 that are docking together are contained in the holding tank 14 of housing 10, and the end of fiber stub 300 is resisted against on the inwall of the first end 11 of housing 10, and multiple optical fiber 400 pass from the recess 13 the first end 11 of housing 10.Pushing block 30 is contained in the holding tank 14 of housing 10, between high-precision optical fiber position alignment element 200 and the second end 12 of housing 10.Threaded rod 20 and the screwed hole (not shown) on the end wall of the second end 12 of housing 10 fit through in the holding tank 14 that this screwed hole enters housing 10, one end entering holding tank 14 of threaded rod 20 presses against or is connected on pushing block 30, pushing block 30 just can be promoted by rotating threaded rod 20, thus pushing high-precision optical fiber position alignment element 200 and fiber stub 300, thus high-precision optical fiber position alignment element 200 and fiber stub 300 being clamped between the first end 11 and the pushing block 30 of housing 10, thus high-precision optical fiber position alignment element 200 and fiber stub 300 are kept together.As shown in Figure 3, multiple calibration holes 201 on high-precision optical fiber position alignment element 200 are arranged in a row (can also be lined up multiple rows of, namely the array format of multirow × multiple row is lined up), and high-precision optical fiber position alignment element 200 includes a pair high accuracy alignment guide element 100, and a pair high accuracy alignment guide element 100 is symmetrically arranged at the both sides of a row or multi-row calibration hole 201.In the embodiment shown in fig. 3, high-precision optical fiber position alignment element 200 is the integral element only formed by parts, and calibration hole 201 is circular port or the feature holes meeting optical fiber external form special shape.
In the process making fiber stub 300, fiber stub 300 in system is docked with high-precision optical fiber position alignment element 200 by high accuracy alignment guide element 100, and control spacing distance between the two, fiber stub 300 and high-precision optical fiber position alignment element 200 is kept, so that the optical fiber through hole of fiber stub 300 is directed at the calibration hole 201 of high-precision optical fiber position alignment element 200 by clamping device 700 is fixing.Again multifiber is respectively penetrated in the high-precision calibration hole 201 of high-precision optical fiber position alignment element 200, to replicate the position of the high-precision calibration hole 201 of this high-precision optical fiber position alignment element 200.Then pass through suitable injecting glue, solidification and grinding technics and can realize the adapter of high-performance and low-cost.
In embodiment shown in Fig. 1 to Fig. 3, the high-precision optical fiber position alignment element 200 of alignment tools is the integral element only formed by parts.But, the present invention is not limited to this, and the high-precision optical fiber position alignment element of alignment tools can also be the split type element formed by the parts of at least two independence.
Such as, Fig. 4 is the schematic perspective view of the another kind of change case of the high-precision optical fiber position alignment element of alignment tools according to the second embodiment of the present invention；Fig. 5 is the end view of the alignment tools shown in Fig. 4.
As shown in Figure 4 and Figure 5, high-precision optical fiber position alignment element includes: pedestal 200 ', is formed with a recess 202 in pedestal 200 ', and row's calibration hole 201 ' is formed on the diapire of recess 202；With briquetting 800, briquetting 800 is placed in the recess 202 of pedestal 200 ', for being maintained in calibration hole 201 ' by the optical fiber inserting calibration hole 201 '.
In embodiment shown in Fig. 4 and Fig. 5, calibration hole 201 ' is U-type groove hole.
Fig. 6 is the schematic perspective view of another change case of the high-precision optical fiber position alignment element of alignment tools according to the third embodiment of the invention；With the end view that Fig. 7 is the alignment tools shown in Fig. 6.
Compared with the embodiment shown in Fig. 4 and Fig. 5, the difference of the high-precision optical fiber position alignment element shown in Fig. 6 and Fig. 7 is only that calibration hole is V-groove hole 201 ".
In the embodiment of aforementioned exemplary, describing a kind of alignment methods for calibrating optical fiber position in the optical fiber through hole of fiber stub, described method comprises the steps:
S100: provide an independent alignment tools, the precision of described alignment tools is higher than the precision of fiber stub；With
S200: use alignment tools calibration optical fiber position in the optical fiber through hole of fiber stub.
According to an example of the present invention embodiment, described step S200 comprises the following steps:
S201: by high accuracy alignment guide element 100, described fiber stub 300 is docking together with described alignment tools, and with clamping device, described fiber stub 300 is kept together with described alignment tools；With
S202: in multiple optical fiber through holes that multifiber 400 is each passed through fiber stub 300 the multiple calibration holes 201 being inserted into high-precision optical fiber position alignment element 200, for making the optical fiber 400 positional precision in the optical fiber through hole of fiber stub 300 reach the optical fiber 400 positional precision in the calibration hole 201 of high-precision optical fiber position alignment element 200.
Another example embodiments according to the present invention, further comprises the steps of: after step S200
S300: be fixed in fiber stub by optical fiber by solidified glue, described glue was filled in the optical fiber through hole of fiber stub before or after optical fiber inserts the optical fiber through hole of fiber stub.
The protection object of the present invention is not limited only to aforementioned alignment tools and/or aforementioned alignment methods, also includes the fiber stub assembly utilizing aforementioned alignment tools and/or aforementioned alignment methods to make and the joints of optical fibre including this fiber stub assembly.
In the embodiment of another exemplary of the present invention, describe a kind of joints of optical fibre, it includes the precision low-precision optical fiber lock pin equal to or less than the multimode lock pin of standard, in the process manufacturing these joints of optical fibre, utilize aforementioned alignment tools and/or aforementioned alignment methods that optical fiber position in the optical fiber through hole of low-precision optical fiber lock pin is calibrated, so that the positional precision that optical fiber is in the optical fiber through hole of low-precision optical fiber lock pin meets or exceeds the positional precision in the optical fiber through hole of the single mode lock pin of standard, and after the calibration, optical fiber is fixed in low-precision optical fiber lock pin, so that the precision of the joints of optical fibre produced meets or exceeds the precision of the single-mode optical fiber connector of standard.
Fig. 8 shows the partial view of the end face of the fiber stub 300 in Fig. 1.Only show fiber stub 300 an optical fiber through hole 301 and an alignment guide hole 320 in fig. 8.
As shown in Figure 8, in the illustrated embodiment, after optical fiber 400 being fixed in the optical fiber through hole 301 of fiber stub 300 by glue 301, maximum spacing (maximum gauge of the cushion rubber namely formed by glue 301) between the internal face of the optical fiber through hole 301 of fiber stub 300 and the outer peripheral face of optical fiber 400 is more than or equal to the axle center C400 of optical fiber 400 position deviation relative to the theoretical axle center C400 ' by the determined optical fiber of axle center C320 being directed at guide hole 320 of fiber stub 300, namely, insert the optical fiber 400 positional precision relative to alignment guide hole 320 of optical fiber through hole 301.
In the embodiment of an example of the present invention, after the calibration, insert fiber stub 300 optical fiber through hole optical fiber 400 relative to described fiber stub 300 alignment guide hole positional precision at 0～0.002mm.
In the embodiment of another exemplary of the present invention, the diameter dimension tolerance of the alignment guide hole of fiber stub 300 is at-0.001mm～0.001mm.
In the embodiment of another exemplary of the present invention, the diameter dimension tolerance of the optical fiber through hole of fiber stub 300 is at 0.000mm～0.030mm.
In the embodiment shown in fig. 1, optical fiber is conventional single-core fiber 400.But, the present invention is not limited to this, and optical fiber can also be other type of optical fiber.Such as, the other two kinds of optical fiber shown in Fig. 9 and Figure 12.
Fig. 9 shows the schematic diagram of the another kind of optical fiber according to the present invention.As it is shown in figure 9, optical fiber is the multicore fiber 410 including multiple fibre core 411.In the illustrated embodiment, this multicore fiber 410 includes 19 fibre cores 411, but, the present invention is not limited to this, and this multicore fiber 410 can also include two or more fibre cores 411.In the illustrated embodiment, many fibre cores 411 are outsourced coating 412 and wrap up and fix in place, and external coating 412 forms an exterior circular column.
Figure 10 shows the schematic perspective view of many loose optical fiber；Figure 11 shows the end view of the loose optical fiber of many in Figure 10；Figure 12 shows that the loose optical fiber of many in Figure 10 and Figure 11 is calibrated the schematic perspective view of the bundled optical fibers being subsequently formed in the calibration hole of the present invention；End view with the bundled optical fibers that Figure 13 calibration shown in Figure 12 is subsequently formed.
As shown in Figure 10 and Figure 11, seven loose optical fiber 421 are emitted on together brokenly, and the mutual alignment between these loose optical fiber 421 is uncertain.But, after the optical fiber 421 that these are loose is inserted in the calibration hole 201 of the truing tool of the present invention, as shown in Figure 12 and Figure 13, these seven loose optical fiber 421 are just held suitable position, form a bundled optical fibers (or being called many fibre bundles) 420 including seven optical fiber 421.
As shown in Figure 12 and Figure 13, in this bundled optical fibers 420, mutually tangent between any two adjacent optical fiber 421.Such as, in the illustrated embodiment, an optical fiber is in centre, and another six roots of sensation optical fiber is around this root optical fiber, and these seven optical fiber are tangent between two.
Although in the illustrated embodiment, this bundled optical fibers 420 includes seven optical fiber 421, but, the present invention is not limited to this, and this bundled optical fibers 420 can also include two or more multifiber 421.
In one embodiment of the invention, the every optical fiber 421 in bundled optical fibers 420 can for the conventional single-core fiber 400 shown in Fig. 1 or the multicore fiber 410 shown in Fig. 9.
In order to calibrate many loose optical fiber 421 shown in Figure 10 and Figure 11, calibration hole 201 can be the hole of circular port, quincunx hole, polygonal hole or other suitable shape, as long as the calibration fiber that many loose can be become the bundled optical fibers 420 that any two adjacent optical fiber 421 is all mutually tangent by the shape of this calibration hole.
In one embodiment of the invention, have the optical fiber of multiple fibre core (single fiber multicore, many fibre bundles) after positional precision is calibrated, be cured in low precision lock pin before, the radial orientation angle of optical fiber adjusts specific distribution orientation, and after being solidificated in lock pin, the radial orientation angle of optical fiber meets the interworking docking of multi-core connector.
The present invention compared with prior art, has abandoned in prior art and has manufactured single mode and multimode fibre adapter by separating the lock pin of different accuracy specification.
Especially, low-loss or ultra-low-loss fiber adapter is made when needs, the method that existing technical staff uses is (to reduce optical fiber through-hole aperture by the accuracy specification of raising lock pin, and improve the positional precision in center and the alignment guide hole of optical fiber through hole) realize the target of ultra-low loss, the distinct disadvantage of do so is, one, that means a kind of high cost；They are two years old, owing to ultraprecise lock pin optical fiber through hole becomes less, and the change that the actual outside diameter of optical fiber also exists batch, it is a great challenge for wearing fibre (through whole lock pin optical fiber through hole), causing that disconnected fine probability increases, particularly dark damage can cause that the reliability of light wiring connector reduces；Its three, for batch micro operations, total exist some individual eccentric discreteness, as long as occurring, namely the random interworking insertion loss of light interface unit is destroyed, etc. shortcoming.
And adopt the technology of the present invention, namely the physical location collimation of the single-mode fiber that high-precision alignment tools is pointed in low precision lock pin (such as multimode lock pin) is utilized, owing to replicating the positional precision of the high accuracy alignment tools on opposite at optical fiber processed, achieve in the lock pin of low precision, produce the single-mode optical fiber connector part of high-performance (low-loss).This invention, considerably reduce lock pin required precision, the Material Cost of product is reduced Technology design, similarly, no matter this technology is use manually or fibre is worn by automatization, wear fine action and become more easy, be particularly advantageous in the automatization of technical process, increase production capacity and the further cost that reduces is possibly realized；Need to further pointing out, this technology knows the performance of product by the precision of instrument, have controllability, predictability, individuality to individuality precision can repetition.So, this invention is simultaneously achieved low cost and high performance interface unit manufacturing technology.
It will be appreciated by those skilled in the art that, embodiment described above is all illustrative of, and those skilled in the art can make improvements, when the conflict in not recurring structure or principle of the structure described in various embodiments, independent assortment can be carried out.
Although describing the present invention in conjunction with accompanying drawing, but the embodiment disclosed in accompanying drawing is intended to the preferred embodiment for the present invention illustrative, and it is not intended that a kind of of the present invention is limited.
Although some embodiments of this present general inventive concept are shown and explanation, those skilled in the art will appreciate that, when without departing substantially from the principle of this present general inventive concept and spirit, can these embodiments being made a change, the scope of the present invention limits with claim and their equivalent.
It should be noted that word " including " is not excluded for other element or step, word "a" or "an" is not excluded for multiple.It addition, any element numbers of claim should not be construed as restriction the scope of the present invention.
Claims (28)
1. an alignment tools, for calibrating optical fiber position in the optical fiber through hole of porous optical fiber lock pin, the precision of described porous optical fiber lock pin is equal to or less than the precision of the multimode lock pin of standard, it is characterised in that
Described alignment tools includes high accuracy alignment guide element and high-precision optical fiber position alignment element, and the precision of described high-precision optical fiber position alignment element equals to or higher than the precision of the single mode lock pin of standard,
Described porous optical fiber lock pin is docked with described high-precision optical fiber position alignment element by high accuracy alignment guide element, and during multifiber is each passed through multiple optical fiber through holes of porous optical fiber lock pin and is inserted into multiple calibration holes of high-precision optical fiber position alignment element, for making optical fiber positional precision in the optical fiber through hole of porous optical fiber lock pin reach optical fiber positional precision in the calibration hole of high-precision optical fiber position alignment element
Described alignment tools also includes screw clamp, and this screw clamp includes:
Housing, has the holding tank extended between first end and the second end of housing, and porous optical fiber lock pin and high-precision optical fiber position alignment element are contained in this holding tank, and porous optical fiber lock pin is resisted against on the inwall of the first end of housing；
Pushing block, is contained in the holding tank of housing, and between high-precision optical fiber position alignment element and the second end of housing；With
Threaded rod, fits through in the holding tank that this screwed hole enters housing with the screwed hole on the end wall of the second end of housing,
Wherein, promoting pushing block by rotating threaded rod, thus pushing high-precision optical fiber position alignment element and porous optical fiber lock pin, both being kept together.
2. alignment tools according to claim 1, it is characterised in that
Described high accuracy alignment guide element is high accuracy guid needle instrument, and described high accuracy guid needle instrument flatly extends forward from the end face of high-precision optical fiber position alignment element；And
Described high accuracy alignment guide element inserts in the corresponding alignment guide hole of described porous optical fiber lock pin, for the axis making the alignment guide hole of described porous optical fiber lock pin and the axis alignment being directed at guide element in high precision, so that the axis of the multiple optical fiber penetrated in multiple optical fiber through holes of porous optical fiber lock pin is directed at the axis of multiple calibration holes of described high-precision optical fiber position alignment element respectively.
3. alignment tools according to claim 2, it is characterised in that described high-precision optical fiber position alignment element is the ultraprecise porous lock pin instrument that precision exceedes single mode lock pin.
4. alignment tools according to claim 3, it is characterised in that
When calibration, the end face of described high-precision optical fiber position alignment element and described porous optical fiber lock pin is predetermined distance.
5. alignment tools according to claim 3, it is characterised in that
When calibration, the part in the calibration hole being inserted into described high-precision optical fiber position alignment element of described optical fiber has predetermined length.
6. alignment tools according to claim 2, it is characterised in that also include:
Separation control part, is arranged between the end face of porous optical fiber lock pin and high-precision optical fiber position alignment element, is used for controlling the distance between porous optical fiber lock pin and the end face of high-precision optical fiber position alignment element during calibration.
7. alignment tools according to claim 6, it is characterised in that described high accuracy alignment guide element traverse Separation control part.
8. alignment tools according to claim 2, it is characterised in that
Multiple calibration holes on described high-precision optical fiber position alignment element are arranged in a row or multiple rows of；And
Described alignment tools includes a pair high accuracy and is directed at guide element, and the pair of high accuracy alignment guide element is symmetrically arranged at the both sides of a row or multi-row calibration hole.
9. alignment tools according to claim 8, it is characterised in that
Described high-precision optical fiber position alignment element is the integral element only formed by parts, and described calibration hole is circular port or the feature holes meeting optical fiber external form special shape.
10. alignment tools according to claim 8, it is characterised in that
Described high-precision optical fiber position alignment element is the split type element formed by the parts of at least two independence.
11. alignment tools according to claim 10, it is characterised in that described high-precision optical fiber position alignment element includes:
Pedestal, is formed with a recess in described pedestal, row's calibration hole is formed on the diapire of recess；With
Briquetting, described briquetting is placed in the recess of described pedestal, for being maintained in calibration hole by the optical fiber inserting calibration hole.
12. alignment tools according to claim 11, it is characterised in that described calibration hole is U-type groove hole or V-groove hole.
13. for the alignment methods calibrating optical fiber position in the optical fiber through hole of porous optical fiber lock pin, described method comprises the steps:
S100: provide an alignment tools according to any one of claim 1-12, the precision of described alignment tools is higher than the precision of porous optical fiber lock pin；With
S200: use alignment tools calibration optical fiber position in the optical fiber through hole of porous optical fiber lock pin.
14. alignment methods according to claim 13, wherein, described step S200 comprises the following steps:
S201: by high accuracy alignment guide element, described porous optical fiber lock pin and described alignment tools are docking together, and with clamping device, described porous optical fiber lock pin and described alignment tools are kept together；With
S202: in multiple optical fiber through holes that multifiber is each passed through porous optical fiber lock pin the multiple calibration holes being inserted into high-precision optical fiber position alignment element, for making optical fiber positional precision in the optical fiber through hole of porous optical fiber lock pin reach optical fiber positional precision in the calibration hole of high-precision optical fiber position alignment element.
15. alignment methods according to claim 14, it is characterised in that
The optical fiber through hole of described porous optical fiber lock pin is filled with glue, for described optical fiber is fixed in the optical fiber through hole of described porous optical fiber lock pin,
Described glue was filled in the optical fiber through hole of porous optical fiber lock pin before or after optical fiber inserts the optical fiber through hole of porous optical fiber lock pin.
16. alignment methods according to claim 15, wherein, further comprise the steps of: after step S200
S300: optical fiber is fixed in porous optical fiber lock pin by solidified glue.
17. a fiber stub assembly, multifiber including porous optical fiber lock pin He the multiple optical fiber through holes being arranged in porous optical fiber lock pin, it is characterized in that, described porous optical fiber ferrule assembly utilizes the alignment methods of any one in the alignment tools of any one in aforementioned claim 1-12 or aforementioned claim 13-16 to make.
18. fiber stub assembly according to claim 17, wherein,
After the calibration, insert described porous optical fiber lock pin optical fiber through hole optical fiber relative to described porous optical fiber lock pin alignment guide hole positional precision at 0～0.002mm.
19. fiber stub assembly according to claim 17, wherein,
The diameter dimension tolerance of the alignment guide hole of described porous optical fiber lock pin is at-0.001mm～0.001mm.
20. fiber stub assembly according to claim 17, wherein,
The diameter dimension tolerance of the optical fiber through hole of described porous optical fiber lock pin is at 0.000mm～0.030mm.
21. fiber stub assembly according to claim 17, wherein,
The diameter dimension tolerance of the alignment guide hole of described porous optical fiber lock pin is at-0.001mm～0.001mm；And
The diameter dimension tolerance of the optical fiber through hole of described porous optical fiber lock pin is at 0.000mm～0.030mm.
22. fiber stub assembly according to claim 17, wherein,
After optical fiber being fixed in the optical fiber through hole of porous optical fiber lock pin by glue or equivalent curable body, the maximum spacing between the internal face of the optical fiber through hole of described porous optical fiber lock pin and the outer peripheral face of described optical fiber more than or equal to the axle center of described optical fiber relative to the position deviation by determined theoretical axle center, the axle center being directed at guide hole of described porous optical fiber lock pin.
23. joints of optical fibre, it is characterised in that the described joints of optical fibre include the fiber stub assembly that claim 17 limits.
24. joints of optical fibre, equal to or less than the low precision porous optical fiber lock pin of the multimode lock pin of standard including precision, it is characterised in that
In the fabrication process, utilize the alignment methods of any one in the alignment tools of any one in aforementioned claim 1-12 or aforementioned claim 13-16 that optical fiber position in the optical fiber through hole of low precision porous optical fiber lock pin is calibrated, so that the positional precision that optical fiber is in the optical fiber through hole of low precision porous optical fiber lock pin meets or exceeds the positional precision in the optical fiber through hole of the single mode lock pin of standard, and after the calibration, optical fiber is fixed in low precision porous optical fiber lock pin, so that the precision of the multi-fiber connector produced meets or exceeds the precision of the single mode multi-fiber connector of standard.
25. the joints of optical fibre according to claim 23 or 24, it is characterised in that described optical fiber is conventional single-core fiber.
26. the joints of optical fibre according to claim 23 or 24, it is characterised in that described optical fiber is the multicore fiber including multiple fibre core, i.e. single fiber multicore.
27. the joints of optical fibre according to claim 23 or 24, it is characterised in that described optical fiber is the bundled optical fibers including multifiber, the i.e. aggregation of many optical fiber that single-core fiber is formed.
28. the joints of optical fibre according to claim 23 or 24, have the optical fiber of multiple fibre core after positional precision is calibrated, be cured in low precision lock pin before, the radial orientation angle of optical fiber adjusts specific distribution orientation, and after being solidificated in lock pin, the radial orientation angle of optical fiber meets the interworking docking of multi-core connector.
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| CN201310226188.7A CN104181644B (en) | 2013-05-28 | 2013-06-07 | Alignment tools, alignment methods, fiber stub assembly and the joints of optical fibre |
| PCT/IB2014/061971 WO2014195893A1 (en) | 2013-06-07 | 2014-06-05 | Indexing tool, calibrating method, ferrule assembly and fiber optic connector |
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| CN2013102031207 | 2013-05-28 | ||
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| CN201310226188.7A CN104181644B (en) | 2013-05-28 | 2013-06-07 | Alignment tools, alignment methods, fiber stub assembly and the joints of optical fibre |
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| CN107608032B (en) | 2014-07-01 | 2019-12-20 | 泰科电子(上海)有限公司 | Optical fiber alignment device, ferrule device and method for manufacturing ferrule device |
| CN105445864B (en) | 2014-07-01 | 2017-12-05 | 泰科电子(上海)有限公司 | Ferrule assembly and lock pin device |
| CN107918174A (en) | 2016-10-11 | 2018-04-17 | 康普技术有限责任公司 | Ferrule assembly, the method and optical fiber fixing mould for manufacturing ferrule assembly |
| CN110346871B (en) * | 2018-04-03 | 2020-12-15 | 光联通讯有限公司 | Multi-core optical fiber attenuator |
| CN112162365B (en) * | 2020-10-27 | 2021-05-04 | 武汉长盈通光电技术股份有限公司 | Single-mode fiber and multi-core fiber rapid coupling device and method |
| CN112255740B (en) * | 2020-11-20 | 2022-03-18 | 长飞光纤光缆股份有限公司 | Multi-core optical fiber connector and manufacturing method thereof |
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| JP3363479B2 (en) * | 1992-07-17 | 2003-01-08 | 住友電気工業株式会社 | Optical connector |
| US5664039A (en) * | 1994-06-08 | 1997-09-02 | The Whitaker Corporation | High density fiber ferrules and connectors |
| JP2001249249A (en) * | 2000-03-07 | 2001-09-14 | Fujikura Ltd | Multi-fiber connector and its attaching method and jig for attaching optical fiber |
| JP2012185283A (en) * | 2011-03-04 | 2012-09-27 | Furukawa Electric Co Ltd:The | Multi-fiber optical connector, manufacturing method for multi-fiber optical connector, and alignment member for manufacturing multi-fiber optical connector |
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