CN1529190A - Plastical optical-fiber coupler and manufacturing method thereof - Google Patents
Plastical optical-fiber coupler and manufacturing method thereof Download PDFInfo
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- CN1529190A CN1529190A CNA2003101009344A CN200310100934A CN1529190A CN 1529190 A CN1529190 A CN 1529190A CN A2003101009344 A CNA2003101009344 A CN A2003101009344A CN 200310100934 A CN200310100934 A CN 200310100934A CN 1529190 A CN1529190 A CN 1529190A
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- optical fiber
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Abstract
The invention relates to manufacturing plastic fiber coupler with high accuracy and low cost as well as its manufacturing method. The method possesses advantages of easy of operation, without need of time consuming procedure for removing clad as well as high cost and complex online monitoring system, adjustable spectrum ratio, high accuracy, easy of control and stable performance. The procedure for manufacturing fusing type plastic fiber coupler is as follows. N pieces of optical fiber core with no clad are wrung as a bundle. Heated in hollow electrical furnace under temperature controlled accurately, the said bundle is stretched in biconical. After natural cooling, shaped bundle is taken out. Then, clad is coated to whole coupler. Cutting out part of fiber at two ends, treating ends of optical fiber, encapsulating the coupler in firm protecting body make an integrated plastic fiber coupler.
Description
Technical field the invention belongs to the plastic optical fibre coupler technical field, relates in particular to a kind of plastic optical fibre coupler and manufacture method thereof.
Background technology is current, and the plastic optical fiber net has obtained extensive studies at home and abroad.Plastic optical fibre coupler is a kind of crucial optical passive component in the plastic optical fiber net.Fiber coupler be with one the road or several roads input optical signal redistribute, output to the optical passive component in the output optical fibre.
Fiber coupler of a great variety, but mostly be silica fiber coupler.Plastic optical fibre coupler and silica fiber coupler have points of resemblance, and difference is also arranged.The fused biconical taper method is a kind of main production method of silica fiber coupler, and this method production cost is low, and performance is good, the yield rate height.Tradition fused biconical taper method fiber coupler is coat and an optics covering of partly removing optical fiber by chemistry or mechanical method, then, the optical fiber of part having been removed covering is screwed in together, heating is drawn into biconial, realizes optically-coupled (seeing U.S. Patent No. 4822128 and Chinese patent No.1149136A, 1069126A) at corresponding circle of sensation.This traditional method for making removal covering operation is time-consuming and be difficult to control, and chemical method or mechanical means are removed covering all can cause damage to optical fiber, introduces bigger loss and scattering.Do not remove covering yet, only remove (seeing United States Patent (USP) 5339374, PCT patent WO 01/65286 A1 and Chinese patent No.1076030) that coat directly draws.These methods all have a shortcoming, and promptly the output terminal Output optical power changes with the tensile elongation quick oscillation, and the long more variation fast more (referring to D.B.Mortimore, ElectronicsLetters, 21 (17), 742-743,1985) that stretches.So just cause the fiber coupler output-power fluctuation that draws out big, needed to adopt online measuring technique solve this problem.Classic method is in pulling process, at the input end input optical signal, utilize the light power meter real-time online to detect Output optical power at output terminal simultaneously, when splitting ratio reaches requirement, stop to stretch (seeing Chinese patent No.87101028A, No.1069126A, No.1013999B, No.1338645A and No.1096376A).Plastic optical fibre coupler also has the bibliographical information (A.Brockmeyer etc. that utilize the fused biconical taper manufactured, Applied Optics, 31 (6), 746-749,1992 and L.R.Kawase etc., POF ' 2000 USA, 68-71,2000), but before they required to stretch, part was removed online detection Output optical power in covering and the pulling process.Remove the covering operation, restive, and can introduce various impurity and bring loss and scattering.Online detection needs light source and measuring equipment, also wants complicated accurate coupling device and opertaing device in addition between light source and the waveguide.These are production cost greatly all.Chinese patent No.88108839.0 adopts classic method, utilizes the heating of plastic shrinkage sleeve bag bundle optical waveguide to make plastic optical fibre coupler.But this patent of invention is utilized after the shrink sleeve heat shrink as the optics covering of optical waveguide melting zone, and is gapped between shrink sleeve and the optical waveguide like this, bad as covering, and optical waveguide is just put into shrink sleeve is difficult to.The coupling mechanism physical strength that this patent of invention is made is determined by shrink sleeve, and the physical strength of shrink sleeve is very low.In addition, this patent of invention does not provide the manufacture method of non-homogeneous splitting ratio coupling mechanism.
Summary of the invention the objective of the invention is the shortcoming at traditional fused biconical taper fiber coupler, provide a kind of splitting ratio adjustable, need not remove covering, do not need online detection, high-level efficiency, can accurately control pulling process, firmly and the manufacture method of the low-cost plastic optical fibre coupler of stable performance.Make plastic optical fibre coupler according to method provided by the invention, make simply, the splitting ratio fluctuation is very little.As long as the present invention is stretched to a certain degree, splitting ratio will reach very high precision, and it is very little to fluctuate, and the splitting ratio that stretches again is constant substantially, and tensile elongation is very little to the influence of splitting ratio.This is the place that obviously is better than classical production process.In addition, bracing means of the present invention provides simultaneously reinforces coupling mechanism and the effect that is connected input-output optical fiber, and this greatly reduces link cost.
The present invention adopts the method add hot-stretch to make M * N (M 〉=2, N 〉=2 and N 〉=M) or 1 * N (N 〉=2) multiterminal plastic optical fibre coupler.Be characterized in utilizing device shown in Figure 1, there is not the plastic optical fiber (as the plastic optical fiber of PMMA making) of covering twisted together the N root, pass the hole in the middle of cylindrical shape Electric stove 1, be fixed on the two ends 2-1 and 2-2 of stretching device, rotation 2-1 and 2-2, plastic optical fiber 10-1,10-2 are twisted together, and heating of plastic optical fiber is to glass temperature T
gMore than, softening point T
sBelow (general temperature is 140 ℃～200 ℃, and temperature is decided on the material of making plastic optical fiber), at this moment plastic optical fiber is in resilient soft state.Then, drive precision gear 5-1,5-2,6-1,6-2,7-1,7-2 and ratch 3-1,3-2 stretching optical fiber round about, make zone line pull into biconial by stepper motor 8-1,8-2.Heating arrangement, stepper motor, gear and ratch all are fixed on pedestal 4-1, the 4-2.4-1 is identical with the 4-2 structure, all has the dovetail sliding tray.Ratch 3-1,3-2 place the dovetail sliding tray.Gear 5-1 is identical with 5-2, and 6-1 is identical with 6-2, and 7-1 is identical with 7-2.If the stepper motor rotating speed is ω, the radius of gear 7-1,7-2 is r
1, the radius of gear 6-1,6-2 is r
2, the radius of gear 5-1,5-2 is r
3, draw speed then
Such speed change gear draw speed that can slow down improves the stretching precision.Under the control of Single Chip Microcomputer (SCM) system or computing machine, when being stretched to Len req, stop heating and stretching, treat natural cooling setting back taking-up (can guarantee that like this fused biconical taper district is indeformable), obtain 13.Utilize device shown in Figure 2, be coated with top covering, clad material obtains coupling mechanism shown in Figure 3 16 after solidifying.Be encapsulated in the device 18 16, (bracing means 18 shown in Figure 4 be coupled for 8 * 8 plastic optical fibers its design) as shown in Figure 4 covers lid shown in Figure 5 23 then.18 with 23 devices that reinforce the connection that constitute coupling mechanism.18 at the middle half slot of opening of the roughly the same hard material of thermal expansivity and the material of making plastic optical fibre coupler, two ends get out circular hole 22-1, the 22-2 that equates with coupling mechanism input/output terminal subnumber, Circularhole diameter is slightly larger than coupling mechanism leading-out terminal diameter, and circular hole 1/5～1/10 of the diameter of being pruned.Between circular hole and the middle fluting is two cavity 20-1,20-2, and this is a leading-out terminal for coupling mechanism when inserting in the circular hole, and branch optical fiber can free bend, can not produce stress.All there are opening 21-1,21-2 and 24-1,24-2 in 18 and 23 two ends, and this is the generation stress that is not crushed out of shape when inserting for input-output optical fiber.Certainly plastic optical fibre coupler also can adopt commercial standards connector or connector to be connected with coupling between input-output optical fiber.In the coupling mechanism manufacturing process, the temperature of Electric stove is transferred to single-chip computer control system or computing machine after being measured in real time by high temperature detector 11, controls furnace temperature by the voltage of Single Chip Microcomputer (SCM) system or computer control Electric stove.
Description of drawings
Fig. 1 is for drawing the drawing mechanism synoptic diagram of double-tapered fiber coupling mechanism.
Fig. 2 is the covering applying device.
Fig. 3 is the fiber coupler synoptic diagram behind the coating covering.
Fig. 4 is 2 * 2 coupling mechanism synoptic diagram that are fixed on the bracing means matrix.
Fig. 5 is the lid of device of reinforcing the connection.
Fig. 6 is 1 * 2 coupling mechanism synoptic diagram that is fixed on the bracing means matrix
Embodiment 12 * 2 plastic optical fibre couplers
As shown in Figure 1 two plastic optical fiber 10-1,10-2 that do not have a covering are passed the hole in the middle of the Electric stove 1, and two ends are fixed on 2-1 and the 2-2, rotation 2-1,2-2 are screwed in plastic optical fiber 10-1,10-2 together.Energized, the heating optical fiber zone line.When temperature rises to glass temperature T
gMore than, softening point T
sBelow when (being generally 140～200 ℃), pass to Single Chip Microcomputer (SCM) system or computing machine by the temperature that hygrosensor 11 is measured, utilize Single Chip Microcomputer (SCM) system or computer control Electric stove voltage, keep furnace temperature constant substantially, limit heating edge stretching optical fiber obtains structure shown in 13.Stop heating and stretch, keep extended state constant, treat natural cooling after, take out.Structure shown in the intercepting 13 immerses in the resin 14 that refractive index in the container 12 is lower than optical fibre refractivity and takes out after 1～3 second, or coats the clad material of refractive index less than optical fibre refractivity, solidifies then.Resin 14 or clad material can be organic siliconresin, fluororesin etc., preferably choose clad material and make the numerical aperture of coupling mechanism input and output identical with the numerical aperture that connects optical fiber, can eliminate the numerical aperture mismatch loss like this.Covering obtains 16 after solidifying, two ends 15-1～15-4 of 16 is clipped 3～5mm, polish polishing, then as shown in Figure 4, put into and reinforce device 18, with soft viscose glue 17-1,17-2 the bifurcation of coupling mechanism 16 is bonded in the groove 19 in the middle of the reinforcing device, 4 terminal 15-1～15-4 insertions have been pruned in 1/5～1/10 the circular hole of diameter, Circularhole diameter is than big 5～10 μ m of fibre diameter, so that insert.Cover lid 23 is used screw-driving, and (reinforcing device 18 and lid 23 are its design that is coupled of 8 * 8 plastic optical fibers to constitute 2 * 2 complete plastic optical fibre couplers, when making 2 * 2 coupling mechanisms, can only open two identical circular holes at 18 two ends, device 18 and 23 can be littler, but structure is the same).When being connected with Transmission Fibers, the overlay of Transmission Fibers is removed 7～10mm, polish polished end faces, unclamp screw, the Transmission Fibers insertion is placed with in the circular hole of coupling mechanism input and output terminal, align with 15-1～15-4, tighten screw then, also can be at Transmission Fibers and 15-1～15-4 be connected several index-matching fluids of drop.
Embodiment 21 * 2 plastic optical fibre couplers
Adopt same processes with embodiment 1, make 16.Because the plastic optical fibre coupler directivity of making very high (can greater than 40dB) according to embodiment 1, end with 16 cuts out a terminal 15-4 from crotch, be fixed in the middle groove 19 of reinforcing device, as shown in Figure 6 at crotch 16 with soft viscose glue 17-1,17-2 then.Cover lid 23 is used screw-driving, constitutes 1 * 2 complete plastic optical fibre coupler.
Embodiment 3 splitting ratios are 60: 40 1 * 2 plastic optical fibre coupler
Be 1mm with a diameter earlier, do not have the optical fiber of covering to pass the Electric stove of hollow, two ends are fixed on 2-1, the 2-2, and energising is heated to the glass temperature T of optical fiber
gAbove softening point T
sBelow, stretching optical fiber.When the two ends draw speed was identical, two ends obtained identical cone, and the centre is one section right cylinder, and stretching optical fiber makes cylindrical diameter phi=0.8mm, and the intermediate cylindrical body length is that easily cylindrical length is about heating zone length at 5～10cm.With the optical fiber that stretched and the identical diameter that does not have stretched mistake is that the plastic optical fiber of 1mm passes the Electric stove of hollow together, two ends are fixed on 2-1, the 2-2 together, rotation 2-1,2-2 are screwed in the middle circle shell of column of the optical fiber that stretched with the optical fiber that another did not stretch.Energising is heated to below the above softening point of glass temperature, stretches simultaneously, and elongation is 1～10cm, and 2～5cm is good, and outage stops heating and stretches.After treating natural cooling setting, take out, coat with embodiment 1 in identical clad material.Follow-up production process is identical with embodiment 1.The input/output terminal period of the day from 11 p.m. to 1 a.m at amputation coupling mechanism two ends is stretched to the optical fiber of interlude cylinder diameter φ=0.8mm in advance, and two ends must keep a part, and (5～20mm) diameters are the optical fiber of 1mm, are convenient to like this connect.
Claims (9)
1. method of making plastic optical fibre coupler.Several plastic optical fibers are twisted together, be heated to 100～250 ℃ after, be drawn into biconial, be fixed on then on the bracing means and encapsulation.It is characterized in that the plastic optical fiber that is twisted together does not have the optics covering.
2. according to the described method of claim 1, it is characterized in that all plastic optical fibers all pass the Electric stove of hollow, utilize the Electric stove heating of cylindrical hollow.
3. according to the described method of claim 1, it is characterized in that plastic optical fiber is heated to it more than glass temperature, below the softening temperature.
4. according to the described method of claim 1, it is characterized in that utilizing precision stepper motor drive precision gear and ratch stretched plastic optical fiber round about.
5. according to the described method of claim 1, it is characterized in that plastic optical fiber stretches after, the cladding index of coating is less than the refractive index of plastic optical fiber, clad material can be organic siliconresin, fluororesin etc.
6. according to the described method of claim 1, when it is characterized in that making the coupling mechanism of different splitting ratios, with several plastic optical fiber single stretchings respectively that do not have the optics covering, be twisted together with other optical fiber that does not have in advance to stretch then earlier, add hot-stretch.Splitting ratio is by square decision of each plastic optical fiber that is twisted together before stretching at the join domain diameter.
7. according to the described method of claim 1, it is characterized in that the tail end of optical fiber and coupling mechanism has part to expose, and compresses with dull and stereotyped the lid in the input and output terminal of coupling mechanism and the circular hole that input-output optical fiber is inserted in half opening.
8. according to the described method of claim 1, it is characterized in that the two ends crotch of coupling mechanism is bonded on the fluting hard bracing means with soft viscose glue.
9. according to the described method of claim 1, it is characterized in that the expansion coefficient of the expansion coefficient of bracing means and plastic optical fiber is roughly the same.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101009344A CN100363767C (en) | 2003-10-07 | 2003-10-07 | Plastical optical-fiber coupler and manufacturing method thereof |
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|---|---|---|---|
| CNB2003101009344A CN100363767C (en) | 2003-10-07 | 2003-10-07 | Plastical optical-fiber coupler and manufacturing method thereof |
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| CN1529190A true CN1529190A (en) | 2004-09-15 |
| CN100363767C CN100363767C (en) | 2008-01-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866460A (en) * | 2011-07-05 | 2013-01-09 | 湖南大学校产学协力团 | Manufacturing method and device of plastic optical fiber coupler |
| CN104122620A (en) * | 2013-04-24 | 2014-10-29 | 上海欧翊光电技术有限公司 | Bundled optical fiber cone fused biconical taper system and cone machining method |
| CN105773482A (en) * | 2016-05-04 | 2016-07-20 | 湖州优创科技有限公司 | Detection fixture for network optical fibre cable |
| CN108333144A (en) * | 2018-01-18 | 2018-07-27 | 桂林电子科技大学 | A kind of self-reference micron plastic optical fiber liquid refractive index sensor of coupled structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0219096A3 (en) * | 1985-10-16 | 1989-08-16 | Hitachi, Ltd. | Optical fiber star coupler and method of manufacturing the same |
| US4923268A (en) * | 1987-09-14 | 1990-05-08 | Aster Corporation | Fiber optic coupler |
| TW291539B (en) * | 1994-09-30 | 1996-11-21 | Corning Inc |
-
2003
- 2003-10-07 CN CNB2003101009344A patent/CN100363767C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866460A (en) * | 2011-07-05 | 2013-01-09 | 湖南大学校产学协力团 | Manufacturing method and device of plastic optical fiber coupler |
| CN104122620A (en) * | 2013-04-24 | 2014-10-29 | 上海欧翊光电技术有限公司 | Bundled optical fiber cone fused biconical taper system and cone machining method |
| CN105773482A (en) * | 2016-05-04 | 2016-07-20 | 湖州优创科技有限公司 | Detection fixture for network optical fibre cable |
| CN105773482B (en) * | 2016-05-04 | 2017-07-04 | 湖州优创科技有限公司 | A kind of detection fixture of network fiber line |
| CN108333144A (en) * | 2018-01-18 | 2018-07-27 | 桂林电子科技大学 | A kind of self-reference micron plastic optical fiber liquid refractive index sensor of coupled structure |
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| CN100363767C (en) | 2008-01-23 |
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Granted publication date: 20080123 Termination date: 20111007 |