CN101025461A - Optical connector and connection structure of optical fibers - Google Patents
Optical connector and connection structure of optical fibers Download PDFInfo
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- CN101025461A CN101025461A CN 200710078841 CN200710078841A CN101025461A CN 101025461 A CN101025461 A CN 101025461A CN 200710078841 CN200710078841 CN 200710078841 CN 200710078841 A CN200710078841 A CN 200710078841A CN 101025461 A CN101025461 A CN 101025461A
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Abstract
The invention relates to an optical connector and a connection structure of optical fibers. To connect optical fibers to each other in the state of being cut without polishing end faces of the optical fibers after cutting them. The optical connector is provided with a ferrule 7 with a 1st built-in optical fiber 11, and an optical fiber connector 9 connected with an end edge of the ferrule 7, and the end face of a 2nd optical fiber 12 inserted from the end edge side 9a of the optical fiber connector 9 and the end edge side end face 11a of the 1st optical fiber 11 are butt-connected. A cross-linking-hardening refractive index matching body 6 is adhering to the end edge side end face 11a, and the cross-linking-hardening refractive index matching body 6 cross-linking-hardens a cross-linking-hardening refractive index matching agent applied to the end edge side end face 11a of the optical fiber 11.
Description
Technical field
The present invention relates to a kind of optical connector, especially relate to a kind of can be at the optical connector that simple on-site ground carries out the connection operation of optical fiber that lays of optical fiber.In addition, the invention still further relates to a kind of syndeton of optical fiber.
Background technology
Now, as the method for attachment of optical fiber, generally make optical fiber be close to or make the sleeve pipe that optical fiber is equipped with in its inside to be close to the method for carrying out physical connection each other each other widely.For example,, can enumerate the method for attachment of having used mechanical hinge joint, use the method for attachment of optical connector etc. as the method for such physical connection.And, usually, under the situation that forever connects (after optical fiber has connected, the connection of not installing and removing basically), use the method for attachment of machinery hinge joint to be fit to.In addition, different with permanent connection, under situation about installing and removing continually, use the method for attachment of optical connector to be fit to.And in fact, widely used method of attachment is: the method for attachment for using machinery to link when permanent the connection; It when installing and removing continually the method for attachment of using optical connector.
Because use the method for attachment of machinery hinge joint and use the method for attachment of optical connector all be on the end face of optical fiber, applied fiber axis to the physical connection method of extruding force; thereby; especially in the method for attachment of the predetermined use optical connector that will install and remove continually; in order to prevent that optical fiber from sustaining damage; protect by optical fiber is inserted in the sleeve pipe, then can make the end face of optical fiber realize physics contact (with reference to patent documentation 1-Japanese kokai publication hei 8-114724 communique) each other.
(used the method for attachment of mechanical hinge joint and used method of attachment of optical connector etc.) physical connection method like this, the shape of fiber end face has great influence to connection performance.For example, if the end surface shape of the angular deflection of the end face of optical fiber or optical fiber is coarse, then air will enter between the end face of the optical fiber that is close to mutually and contacts, owing to increase at the Fresnel reflection of the end face of optical fiber, thereby the junction loss of optical fiber increases.As the method that the junction loss that prevents such optical fiber increases, known have after fiber cut, the method that the end face and the sleeve of optical fiber carried out milled processed.
In addition, as after fiber cut, end face and the sleeve to optical fiber do not carry out milled processed, and the method that optical fiber is connected each other with the original state behind the fiber cut, known have with have with the equal refractive index of the refractive index of the core of optical fiber or the refractive index integrated agent of aqueous or smectic of refractive index of refractive index that is similar to fiber core between the method (with reference to patent documentation 2-Japanese kokai publication hei 11-72641 communique, patent documentation 3-Japanese kokai publication hei 11-101919 communique) between the end face of being connected of optical fiber.
Get involved the method for this refractive index integrated agent, can be by the refractive index integrated agent being coated on the end face of optical fiber, the connecting portion that perhaps the refractive index integrated agent is filled to optical fiber docks optical fiber each other, thus, can prevent that air from entering into the connection end face of optical fiber, the Fresnel reflection that reduction produces because of air, thus junction loss reduced.
With the exception of this, known method uses the refractive index of solid shape to integrate the method for member (hereinafter referred to as " film ") (with reference to the two No. 6276705 communique of patent documentation 4-Japan special permission in addition, patent documentation 5-TOHKEMY 2001-324641 communique, patent documentation 6-Japanese kokai publication sho 55-153912 communique).
Yet, the problem that the method that end face and sleeve pipe to optical fiber in the above-mentioned existing method carries out milled processed exists is: using optical fiber, when the optical fiber (hereinafter referred to as " porous optical fiber ") of portion with periodic many hole portion carries out the connection operation of optical fiber at the scene of laying of optical fiber especially within it, for the milled processed of carrying out fiber end face etc. needs for a long time and expend a large amount of man-hours, also must prepare to be used to carry out the lapping device of the milled processed of fiber end face etc. for this reason, thereby, as the method for attachment of the connection operation that is used for carrying out simply optical fiber and be not suitable for.In addition, if carry out the milled processed of porous optical fiber end face, the lapping rejects that is produced during milled processed and (employed during milled processed) lapping compound can enter into the hole portion of porous optical fiber, might cause the increase of junction loss and the reduction of reliability.
On the other hand, 2,3 records of above-mentioned patent documentation with the method for refractive index integrated agent between between the connection end face of optical fiber, because the general refractive index integrated agent that uses the aqueous and smectic of silicon system or paraffin series, thereby, when the optical connector that uses portion within it to have these refractive index integrated agents carried out each other connection of optical fiber, the problem of existence was the hole portion that the refractive index integrated agent can enter into porous optical fiber.Usually, the refractive index of refractive index integrated agent has temperature dependency, thereby the problem of existence is, along with the variations in refractive index of the refractive index integrated agent of the hole portion that enters into porous optical fiber, the loss marked change of porous optical fiber.In addition, because the refractive index integrated agent enters into the hole portion of porous optical fiber, the problem of existence is that the refractive index integrated agent between fiber end face reduces, and is easy to produce hole or bubble between fiber end face, and the optical characteristics of porous optical fiber is significantly reduced.
In addition, though method with the hole portion sealing of porous optical fiber end face was also arranged before connecting optical fiber, need special-purpose device in order to carry out this sealing at the scene of laying of optical fiber; And the processing of carrying out for the hole portion of sealing porous optical fiber end face needs for a long time, thereby the cost that causes connecting the optical fiber operation rises, and is inapplicable as the method for attachment of the connection operation that is used for carrying out simply optical fiber.
In addition, the method of the use film of above-mentioned patent documentation 4,5,6 records, because the diameter of optical fiber is that 80 μ m or 125 μ m etc. are very thin, thereby, will be accurately with film attached to unusual difficulty on the fiber end face, and, for film attached on the optical fiber end, film is still needed and is had cohesiveness or adhesiveness.Therefore, when carrying out the connection operation of optical fiber at the scene of laying of optical fiber, the problem of existence is, is easy to adhere to foreign matters such as dust on the film, causes the reliability of optical fiber to reduce, and the operating efficiency that perhaps causes optical fiber to connect operation reduces.
Summary of the invention
Purpose of the present invention just is to provide a kind of optical connector that solves the problems referred to above.
In order to address the above problem, the optical connector of the present invention's first scheme, it has the sleeve pipe that is built-in with first optical fiber, fiber optic connector with the rear end that is connected this sleeve pipe, the end face of second optical fiber that inserts from rear end one side of this fiber optic connector docks with one side end face, rear end of above-mentioned first optical fiber and is formed by connecting, it is characterized in that, on one side end face, rear end of crosslinking curing type refractive index integrate body attached to above-mentioned first optical fiber, this crosslinking curing type refractive index integrate body forms the crosslinking curing type refractive index integrated agent crosslinking curing on one side end face, rear end that is coated on above-mentioned first optical fiber.
The syndeton of the optical fiber of alternative plan of the present invention, it possesses: first optical fiber, above-mentioned first optical fiber is inserted its inner sleeve pipe, be connected the fiber optic connector of the rear end of this sleeve pipe, from rear end one side of this fiber optic connector be inserted into wherein second optical fiber and attached to the crosslinking curing type refractive index integrate body of one side end face, the above-mentioned first optical fiber rear end, it is characterized in that, one side end face, rear end of first optical fiber and the butt joint of the end face of second optical fiber are connected, and this crosslinking curing type refractive index integrate body forms by making the crosslinking curing type refractive index integrated agent crosslinking curing on one side end face, rear end that is coated on above-mentioned first optical fiber.
In above-mentioned first scheme or alternative plan, the feature that also has is that sphere is made in one side end face, rear end of above-mentioned first optical fiber; And the radius-of-curvature of this sphere is preferably 0.1～30mm.
In above-mentioned first scheme or alternative plan, the feature that also has is that the refractive index of above-mentioned crosslinking curing type refractive index integrate body is in 1.46 ± 0.05.
In above-mentioned first scheme or alternative plan, the feature that also has is that the change of refractive rate of above-mentioned crosslinking curing type refractive index integrate body is in ± 2% under-40 ℃～70 ℃ conditions.
In above-mentioned first scheme or alternative plan, the feature that also has is that the transmittance of above-mentioned crosslinking curing type refractive index integrate body is more than 80%.
In above-mentioned first scheme or alternative plan, the feature that also has is that the fracture elongation of above-mentioned crosslinking curing type refractive index integrate body is more than 50%.
In above-mentioned first scheme or alternative plan, the feature that also has is that the bonding glass power of above-mentioned crosslinking curing type refractive index integrate body is more than the 50 gram/100mm width.
In above-mentioned first scheme or alternative plan, the feature that also has is that the thickness of above-mentioned crosslinking curing type refractive index integrate body is 5-100 μ m.
In above-mentioned first scheme or alternative plan, the feature that also has is that the surface of the above-mentioned crosslinking curing type refractive index integrate body that is connected with the end face of second optical fiber that inserts from rear end one side of above-mentioned fiber optic connector is a dome shape.Therefore, just has following effect.Compare with the situation about having an even surface of crosslinking curing type refractive index integrate body,, thereby the end face of optical fiber is pressed close to each other (effect 1) owing to easy deformation when pushing second optical fiber.The situation about having an even surface of crosslinking curing type refractive index integrate body might be when pushing second optical fiber, residual air layer between the end face (the particularly core of optical fiber) of second optical fiber and crosslinking curing type refractive index integrate body.Though this phenomenon might especially occur in when for example the end face of second optical fiber cuts into the right angle, but, when cutting off obliquely, even push second optical fiber, pushed away by counter owing to the elastic force of crosslinking curing type refractive index integrate body, the core of second optical fiber does not contact with crosslinking curing type refractive index integrate body sometimes.In contrast, the surface configuration of crosslinking curing type refractive index integrate body is under the situation of dome shape, because dividing from central division with crosslinking curing type refractive index integrate body, the end face of second optical fiber contacts, thereby, can residual air layer (effect 2) between the end face (the especially core of optical fiber) of second optical fiber and crosslinking curing type refractive index integrate body.
In above-mentioned first scheme or alternative plan, the feature that also has is, above-mentioned crosslinking curing type refractive index integrate body is only on the end face attached to first optical fiber.Therefore, just has following effect.When the side at first optical fiber also is attached with crosslinking curing type refractive index integrate body, when the rear end part that will adhere to first optical fiber of crosslinking curing type refractive index integrate body is arranged in the groove (V-shaped groove), cause axle offset easily with second optical fiber.In contrast, crosslinking curing type refractive index integrate body only attached to the situation on the end face of above-mentioned first optical fiber under, then can prevent axle offset (effect 1) with second optical fiber.In addition, when the side at first optical fiber also is attached with crosslinking curing type refractive index integrate body, when the rear end part that will adhere to first optical fiber of crosslinking curing type refractive index integrate body is arranged in the groove (V-shaped groove), crosslinking curing type refractive index integrate body will be attached on the part of the groove (V-shaped groove) that second optical fiber was set afterwards, and the process that second optical fiber is set is brought harmful effect.In contrast, only be attached at crosslinking curing type refractive index integrate body under the situation of end face of above-mentioned first optical fiber, then can prevent harmful effect (effect 2) the process that second optical fiber is set.Have again, if the side of first optical fiber also is attached with crosslinking curing type refractive index integrate body, from the top of groove (V-shaped groove) during with the rear end part extruding of first optical fiber, crosslinking curing type refractive index integrate body cracking on first optical fiber side, when the mounting or dismounting that repeat second optical fiber, this crack growth and might have influence on crosslinking curing type refractive index integrate body.In contrast, only under the situation attached to the end face of above-mentioned first optical fiber, just there is not such danger (effect 3) at crosslinking curing type refractive index integrate body.In addition, as using crosslinking curing type refractive index integrate body only attached to the method for the end face of above-mentioned first optical fiber, can consider hydrophobic treatments is carried out in the side of first optical fiber, when preventing on the end face that the refractive index integrated agent is applied to first optical fiber, the stretch side of first optical fiber of refractive index integrated agent.
In above-mentioned first scheme or alternative plan, the feature that also has is, above-mentioned crosslinking curing type refractive index integrate body from the end face of first optical fiber along side attachment.Therefore, just has following effect.When only when the end face of first optical fiber is attached with crosslinking curing type refractive index integrate body, when mounting or dismounting second optical fiber, crosslinking curing type refractive index integrate body might be peeled off from the end face of first optical fiber.In contrast,, under the situation of the side attachment of above-mentioned first optical fiber, then be not easy to strip down at crosslinking curing type refractive index integrate body.
In above-mentioned first scheme or alternative plan, the feature that also has is that in above-mentioned first scheme or alternative plan, the feature that also has is that above-mentioned fiber optic connector has the bigger groove of basal area that is formed with second optical fiber that inserts than one side from its rear end; And the preferred V-shaped groove of above-mentioned groove.
In above-mentioned first scheme or alternative plan, the feature that also has is that above-mentioned second optical fiber is porous optical fiber.
According to the present invention, when carrying out the connection operation of optical fiber (especially porous optical fiber) at the scene of laying of optical fiber, after fiber cut, the end face and so on that need not optical fiber carries out milled processed, just can optical fiber be connected each other with the original state behind the fiber cut.And, a kind of optical connector that obtains good connection performance can be provided, it is not easy to be subjected to the influence of (come from temperature dependency etc. due to) performance time to time change, installs and removes repeatedly easily, and the excellent in stability of light-transfer characteristic.
Description of drawings
Fig. 1 is the cut-open view of the optical connector (optical fiber is after butt joint connects) of expression embodiments of the invention.
Fig. 2 is the side view that is illustrated in an example of the optical fiber in the optical connector that is loaded on embodiments of the invention that has adhered to crosslinking curing type refractive index integrate body on the end face.
Fig. 3 (a) be presentation graphs 2 adhered to the enlarged drawing of an example of the optical fiber end of crosslinking curing type refractive index integrate body at end face.
Fig. 3 (b) be presentation graphs 2 adhered to another routine enlarged drawing of the optical fiber end of crosslinking curing type refractive index integrate body at end.
Fig. 4 is the side view of the optical connector (state of wedge before inserting the wedge insertion groove) of expression embodiments of the invention.
Fig. 5 is the side view of the optical connector (state of wedge after inserting the wedge insertion groove) of expression embodiments of the invention.
Fig. 6 is the side view of the optical connector (state of wedge before insertion wedge insertion groove and after the insertion groove) of expression embodiments of the invention, (Fig. 6 (a) is the A-A sectional view of optical connector shown in Figure 4, and Fig. 6 (b) is the B-B sectional view of optical connector shown in Figure 5).
Fig. 7 is the cut-open view of the optical connector (state of wedge after inserting the wedge insertion groove) of expression embodiments of the invention.
Fig. 8 is the sectional view of an example of second optical fiber of the expression optical connector that inserts the optical connector of embodiments of the invention and comparative example of the present invention.
Fig. 9 is that expression uses the optical connector of the optical connector of embodiments of the invention and comparative example of the present invention to carry out testing the temperature conditions figure of (continuous temperature cyclic test).
Figure 10 is that expression uses the optical connector of the optical connector of embodiments of the invention and comparative example of the present invention to carry out testing the temperature conditions figure of (temperature cycling test).
Figure 11 is that expression uses the optical connector of the optical connector of embodiments of the invention and comparative example of the present invention to carry out testing the temperature conditions figure of (humiture cyclic test).
Figure 12 is that expression uses the optical connector of the optical connector of embodiments of the invention and comparative example of the present invention to carry out testing the temperature conditions figure of (low-temperature test).
Figure 13 is that the thickness that making of the first embodiment of the present invention is attached to the crosslinking curing type refractive index integrate body on one side end face, rear end of first optical fiber changes, and has measured the mensuration figure of thickness (μ m) and the relation of loss recruitment (dB) of the crosslinking curing type refractive index integrate body of temperature cycling test.
Figure 14 is that the thickness that making of the first embodiment of the present invention is attached to the crosslinking curing type refractive index integrate body on one side end face, rear end of first optical fiber changes, and has measured the figure of thickness (μ m) and the relation of loss recruitment (dB) of the crosslinking curing type refractive index integrate body of temperature cycling test.
Embodiment
Below, detailed description is used to implement best mode of the present invention with reference to accompanying drawing.
Fig. 1 is the cut-open view of the optical connector (state after fiber alignment connects) of expression embodiments of the invention.
Be attached with crosslinking curing type refractive index integrate body 6 on the side end face 11a of the rear end of first optical fiber 11, crosslinking curing type refractive index integrate body 6 is that the crosslinking curing type refractive index integrated agent crosslinking curing on the rear end one side end face 11a that is coated on first optical fiber 11 is formed.
As the organic material with refractive index conformability (refractive index integrated agent), can be as required from propylene system for example, epoxy system, ethene system, ethylene system, silicones system, polyurethane series, polyamide-based, fluororesin system, polybutadiene system, organic material such as polycarbonate-based, suitably select to have the material of desired optical characteristics (refractive index, transmittance etc.), but be not limited at this listed material.
And, crosslinking curing type refractive index integrated agent is meant and can reacts under conditions such as heat, light, humidity and electron ray in the above-mentioned refractive index integrated agent and become the material (crosslinking curing) of solid shape from liquid state, all can so long as the connecting portion of the optical fiber of the material after being attached with crosslinking curing (crosslinking curing type refractive index integrate body 6) can carry out the material of light transmission.
The refractive index of crosslinking curing type refractive index integrate body 6 is preferably in 1.46 ± 0.05.This is because if refractive index exceeds 1.46 ± 0.05 scope, then junction loss enlarges markedly and the reflection loss amount significantly reduces.In addition, the refractive index of crosslinking curing type refractive index integrate body 6 is preferably in 1.46 ± 0.01.
The change of refractive rate of crosslinking curing type refractive index integrate body 6 is in ± 2% under-40-70 ℃ temperature conditions preferably.
The transmittance of crosslinking curing type refractive index integrate body 6 is preferably in more than 80%.This is because less than 80%, then the junction loss of connecting portion will be above 1dB as if transmittance.In addition, the transmittance of crosslinking curing type refractive index integrate body 6 is preferably more than 90%.
The fracture elongation of crosslinking curing type refractive index integrate body 6 is preferably more than 50%.This is because if fracture elongation is less than 50%, when being out of shape because of extruding when connecting, be easy to be full of cracks occur or collapse broken on crosslinking curing type refractive index integrate body 6.In addition, the fracture elongation of crosslinking curing type refractive index integrate body 6 is preferred more than 60%.
In addition, so-called " fracture elongation of crosslinking curing type refractive index integrate body " is meant, will be by at the level and smooth thin layer that thickness is the crosslinking curing type refractive index integrated agent of 100 μ m that forms on glass, and to become width by the processing film that the crosslinking curing type refractive index integrate body that this thin layer is solidified be made constitutes be the rectangle of 10mm, when stretching this film with 50nm/ minute draw speed again, up to the extensibility of fracture.
The bonding glass power of crosslinking curing type refractive index integrate body 6 is preferably more than the 50 gram/100mm width.This is because less than 50 gram/100mm width, then when optical fiber was installed and removed with optical connector repeatedly, crosslinking curing type refractive index integrate body 6 was easy to come off as if bonding glass power.
In addition, be contained in the bonding glass power of the crosslinking curing type refractive index integrate body 6 on the end face of first optical fiber 11, compare with the end face side of first optical fiber 11, preferably littler on the surface of crosslinking curing type refractive index integrate body 6.This be because, bonding glass power as if the crosslinking curing type refractive index integrate body 6 on the end face that is contained in first optical fiber 11, equate in the end face side of first optical fiber 11 and the surface of crosslinking curing type refractive index integrate body 6, perhaps compare with the end face side of first optical fiber 11, bigger on the surface of crosslinking curing type refractive index integrate body 6, because second optical fiber 12 will be installed and removed optical connector repeatedly, thereby, when extracting second optical fiber 12, crosslinking curing type refractive index integrate body 6 comes off and easily attached to second optical fiber, 12 these sides.
In addition, so-called " the bonding glass power of crosslinking curing type refractive index integrate body " is meant, will be by at the level and smooth thin layer that thickness is the crosslinking curing type refractive index integrated agent of 100 μ m that forms on glass, and to become width by the processing film that the crosslinking curing type refractive index integrate body that this thin layer is solidified be made constitutes be the rectangle of 10mm, according to " peeling off method for 90 ° " of JIS Z02370, according to carry out the value that 90 ° of load when peeling off are tried to achieve with 50mm/ minute peeling rate and quartzy smooth glass plate.
The thickness of crosslinking curing type refractive index integrate body 6 is advisable with 5-100 μ m.This is because if thickness is less than 5 μ m, because the quantity not sufficient of crosslinking curing type refractive index integrate body 6 is difficult to obtain enough refractive index conformabilities, and optical fiber directly contacts each other easily, therefore, is easy to produce scar etc. at the end face of optical fiber; In addition, if thickness is greater than 100 μ m, then fiber end face interval to each other increases easily, is subjected to axle offset easily or comes from expansion that temperature variation causes or the influence of contraction.The preferred 10-60 μ of the thickness m of crosslinking curing type refractive index integrate body 6, the thickness of crosslinking curing type refractive index integrate body 6 is 15-40 μ m more preferably.
In addition, so-called " thickness of crosslinking curing type refractive index integrate body " be meant, planar and even trapezoidal shape is attached to the thickness of the end face thick of distance first optical fiber 11 of the crosslinking curing type refractive index integrate body 6 on the end face of first optical fiber 11 with orange.
The rear end one side end face 11a of first optical fiber 11 is made the sphere that radius-of-curvature is 0.1-30mm, is to obtain the effect that suppresses junction loss lower for the core by core that makes first optical fiber 11 and second optical fiber 12 that contacts with first optical fiber 11 contacts with as close as possible state.And this is because if the radius-of-curvature of the rear end one side end face 11a of first optical fiber 11 then when being connected with second optical fiber 12, is damaged the end face of second optical fiber 12 easily less than 0.1mm, perhaps make first optical fiber 11 breach occur easily.The effect if the rear end one side end face 11a radius-of-curvature of first optical fiber 11 greater than 30mm, then can not obtain ball (core by making first optical fiber 11 and the core of second optical fiber 12 contact resulting effect with as close as possible state).In addition, the preferred 1-15mm of radius-of-curvature of the rear end one side end face 11a of first optical fiber 11.
As the method that is used for the rear end one side end face 11a of first optical fiber 11 is processed into above-mentioned radius-of-curvature, can enumerate electrodischarge machining method, attrition process method etc.
Below, the first embodiment of the present invention is described.
As crosslinking curing type refractive index integrated agent, use is with 1.0 weight portion crosslinking chemicals (Nippon Polyurethane Industry Co., Ltd.'s system, trade name: コ ロ ネ one ト L) add the solution that mixes in 50% ethyl acetate solution, 100 weight portions of the acrylic resin that is made of n-butyl acrylate/methyl acrylate/acrylic acid/methacrylic acid 2-hydroxyl ethyl ester multipolymer (ratio of components is 82/15/2.7/0.3 (weight portion)) to.
To making the crosslinking curing type refractive index integrate body behind acrylic acid series jointing material coating fluid (the crosslinking curing type refractive index integrated agent) crosslinking curing that obtains like that as mentioned above, be 93-95% with the result of the transmittance of spectrophotometric determination 1300-1600nm wavelength region may.In addition, with Abbe refractomecer measure crosslinking curing type refractive index integrate body refractive index the result at normal temperatures (23 ± 2 ℃) be in 1.465 ± 0.005.
In addition, the result who measures the fracture elongation of crosslinking curing type refractive index integrate body is 200-300%, and the result who measures the bonding glass power of crosslinking curing type refractive index integrate body is 500-1000 gram/10mm width.
Used the crosslinking curing type refractive index integrate body 6 that obtains as mentioned above in the following manner.
Fig. 2 is the side view that is illustrated in an example of having adhered to the optical fiber 5 in the optical connector that becoming of crosslinking curing type refractive index integrate body be contained in embodiments of the invention on the end face.And Fig. 3 (a) is the enlarged drawing of an example of the end of optical fiber 5 shown in Figure 2.
As shown in Figure 2, at first, remove optical fibre core 4 (Hitachi Cable Ltd.'s system, (external diameter is 250 μ m to trade name: BBG-SM-WF, fibre diameter is 125 ± 1 μ m) clad 200mm long, after the surface clean of the optical fiber that is made of glass 5 that will remove and peel off clad with alcohol is clean, with fiber cutter with the end cut of optical fiber 5 meet at right angles (angular error is below 1 °), glue the crosslinking curing type refractive index integrated agent that obtains as mentioned above and make its crosslinking curing (crosslinking curing that normal temperature is placed) by end face top-pour, thereby adhered to crosslinking curing type refractive index integrate body 6 (with reference to Fig. 3 (a)) at optical fiber 5.The thickness of crosslinking curing type refractive index integrate body 6 is 20-25 μ m.
Then, the optical fiber 5 that has adhered to crosslinking curing type refractive index integrate body 6 is cut, and insert in the optical connector 18 that constitutes by sleeve pipe 7, fiber optic connector 9 and shell 13 be fixed to as shown in Figure 4.Fiber optic connector 9 wherein is used for overlay 8 and is made plate 8 clip 10 that plays spring action of strong bonded each other by plate 8, is formed at wedge insertion groove 17 formations that are used to insert the groove 16 of second optical fiber on the plate 8 and are used to insert wedge 15.And, by front cutting optical fiber 5, the front end of sleeve pipe 7 is carried out milled processed at sleeve pipe 7, insert first optical fiber 11.10 optical connectors that are made into like this 18 have been prepared.
Secondly, remove porous optical fiber (Hitachi Cable Ltd.'s system as employed second optical fiber, 12 usefulness when optical fiber lays, (external diameter is 250 μ m to trade name: BBG-HF, fibre diameter is 125 ± 1 μ m) the clad of an end, with alcohol to the surface clean of second optical fiber 12 that constitutes by glass of having removed and peeled off clad clean after, with fiber cutter with the end cut of second optical fiber 12 meet at right angles (angular error is below 1 °), be inserted in the ready optical connector 18, utilize fiber optic connector 9 to connect.Fig. 8 is the sectional view that expression is inserted into an example of second optical fiber 12 in the fiber optic connector 9 of embodiments of the invention.
Following each amount is measured: just connected second optical fiber junction loss (dB) afterwards, reflection loss amount (dB), the loss recruitment that causes by following four kinds of tests that connects the loss recruitment (dB) after normal temperature (23 ± 2 ℃) is placed 24 hours down and connecting portion after second optical fiber 12, that is: (1) continuous temperature cyclic test (75 ℃/8 hours * 42 times circulations of 60 ℃ * humidity of 85 ℃ * 336 hours → temperature of temperature, 95% * 336 hour → temperature-40 ℃ ∽); (2) temperature cycling test (70 ℃/6 hours * 10 times circulations of temperature-40 ℃ ∽); (3) temperature humidity cyclic test (25 ℃ * humidity of 25 ℃ * humidity of temperature, 93%～temperature, 65 ℃ * humidity, 93%～temperature, 25 ℃ * humidity, 93%～temperature, 65 ℃ * humidity, 93%～temperature, 25 ℃ * humidity, 93%～temperature, 65 ℃ * humidity, 93%～temperature 93%) * 5 circulations); (4) (temperature conditions of various tests is shown in Fig. 9-Figure 12 to low-temperature test (temperature-40 ℃ * 240 hours).Use 5 that have prepared in 10 optical connectors 18 in the test (1), use remaining 5 test (2)～test (4) successively.Test (1)～test the table 1 that the results are shown in of (4).
What in addition, Fig. 5-Fig. 7 represented is that first optical fiber 11 is inserted the process that optical connector 18 backs connect with fiber optic connector 9.At first, be inserted on the plate 8 that constitutes fiber optic connector 9 in the formed wedge insertion groove 17 (with reference to Fig. 5) being formed at wedge 15 on the anchor clamps 14.Therefore then, second optical fiber 12 is inserted into and in the V-shaped groove 16 that enlarged, (with reference to Fig. 6 (b), Fig. 7) makes first optical fiber 11 be connected with second optical fiber 12.Though do not limit the shape of groove 16 is special, (section is the groove of V font) can obtain best characteristic during for V-shaped groove.This be because, when the end face of second optical fiber 12 is connected with the rear end one side end face 11a butt joint of first optical fiber 11, butt joint is connected not direct acting crosslinking curing type refractive index integrate body 6 just allow in the space in the V-shaped groove, can obtain good connection performance therefrom.
Below, the second embodiment of the present invention is described.
As crosslinking curing type refractive index integrated agent, the add-on type silicon of having prepared to be made of SD4590/BY24-741/SX212/ toluene (ratio of components is 100/1.0/0.9/50 (weight portion)) is jointing material coating fluid (SD4590, BY24-741, SRX212 are the products of eastern レ ダ ウ コ one ニ Application ゲ Co., Ltd. system).
Making the add-on type silicon that obtains as mentioned above with spectrophotometric determination is that crosslinking curing type refractive index integrate body behind jointing material coating fluid (the crosslinking curing type refractive index integrated agent) crosslinking curing is 92-94% in the result of the transmittance of 1300-1600nm wavelength region may.And under normal temperature (23 ± 2 ℃), be in 1.465 ± 0.005 with the result that Abbe refractomecer is measured the refractive index of crosslinking curing type refractive index integrate body.
In addition, the result who measures the fracture elongation of crosslinking curing type refractive index integrate body is 200-300%, and the result of the bonding glass power of mensuration crosslinking curing type refractive index integrate body is wide for 500-1000 gram/100mm.
Used the crosslinking curing type refractive index integrate body that obtains as mentioned above in the following manner.
Fig. 2 is the side view that is illustrated in an example of having adhered to the optical fiber 5 in the optical connector that becoming of crosslinking curing type refractive index integrate body be contained in embodiments of the invention on the end face.And Fig. 3 (a) is the enlarged drawing of an example of the end of optical fiber 5 shown in Figure 2.
As shown in Figure 2, at first, remove optical fibre core 4 (Hitachi Cable Ltd.'s system, (external diameter is 250 μ m to trade name: BBG-SM-WF, fibre diameter is 125 ± 1 μ m) clad 200mm long, after the surface clean of the optical fiber that is made of glass 5 that will remove and peel off clad with alcohol is clean, with fiber cutter with the end cut of optical fiber 5 meet at right angles (angular error is below 1 °), glue the crosslinking curing type refractive index integrated agent that obtains as mentioned above and make its crosslinking curing (crosslinking curing that normal temperature is placed) by end face top-pour, thereby adhered to crosslinking curing type refractive index integrate body 6 (with reference to Fig. 3 (a)) at optical fiber 5.The thickness of crosslinking curing type refractive index integrate body 6 is 20-25 μ m.
Then, the optical fiber 5 that has adhered to crosslinking curing type refractive index integrate body 6 is cut, and insert in the optical connector 18 that constitutes by sleeve pipe 7, fiber optic connector 9 and shell 13 be fixed to as shown in Figure 4.Fiber optic connector 9 wherein is used for overlay 8 and is made plate 8 clip 10 that plays spring action of strong bonded each other by plate 8, is formed at wedge insertion groove 17 formations that are used to insert the groove 16 of second optical fiber on the plate 8 and are used to insert wedge 15.And, by front cutting optical fiber 5, the front end of sleeve pipe 7 is carried out milled processed at sleeve pipe 7, insert first optical fiber 11.10 optical connectors that are made into like this 18 have been prepared.
Use these optical connectors to carry out similarly to Example 1 and being connected of porous optical fiber (second optical fiber 12), test successively (1)～test (4).Test (1)～test the table 2 that the results are shown in of (4).In addition, Fig. 8 is the sectional view that expression is inserted into an example of second optical fiber 12 in the optical connector of embodiments of the invention.
Comparative example 1
Below, comparative example of the present invention is described.
As non-crosslinked curing type refractive index integrated agent, prepared OC-431A-LVP (Nye LubriCants.Inc system, refractive index 1.45).Then, used this non-crosslinked curing type refractive index integrated agent in the following manner.
Remove optical fibre core 4 (Hitachi Cable Ltd.'s system, (external diameter is 250 μ m to trade name: BBG-SM-WF, fibre diameter is 125 ± 1 μ m) clad 200mm long, with alcohol to the surface clean of the optical fiber that constitutes by glass 5 of having removed and peeled off clad clean after, with fiber cutter with the end cut of optical fiber 5 meet at right angles (angular error is below 1 °).
Then, optical fiber 5 is cut, and insert and to be fixed in the optical connector identical with optical connector shown in Figure 4 18.Then,, the front end of sleeve pipe is carried out milled processed, above-mentioned non-crosslinked curing type refractive index integrated agent is filled in the connecting portion of the optical fiber in the optical connector at the front cutting optical fiber 5 of sleeve pipe.Prepared the optical connector 22 (not shown) that is made into like this.
Use these optical connectors and embodiment 1,2 similarly to carry out and being connected of porous optical fiber (second optical fiber 12), test successively (1)～test (4).Test (1)～test the table 1 that the results are shown in of (4).In addition, Fig. 8 is the sectional view that expression is inserted into an example of second optical fiber 12 in the optical connector of comparative example of the present invention.
Table 1
| Embodiment | Comparative example 1 | |||
| 1 | 2 | |||
| Normal temperature (23 ± 2 ℃) (just having connected the back) | Junction loss (dB) | 0.1～0.4 | 0.2～0.5 | 0.1～0.4 |
| Reflection loss amount (dB) | -60～-45 | -55～-45 | -55～-45 | |
| Normal temperature (23 ± 2 ℃) (placing after 24 hours) | Loss recruitment (dB) | 0.00～0.02 | 0.00～0.03 | More than 1 |
| Continuous humiture cyclic test loss recruitment (dB) | Less than 0.3 | Less than 0.3 | More than 1 | |
| Temperature cycling test loss recruitment (dB) | Less than 0.3 | Less than 0.3 | More than 1 | |
| Humiture cyclic test loss recruitment (dB) | Less than 0.3 | Less than 0.3 | More than 1 | |
| Low-temperature test loss recruitment (dB) | Less than 0.3 | Less than 0.3 | More than 1 | |
※ measures wavelength=1550nm, light source: light emitting diode (LED)
As follows to evaluation of test result.
What table 1 was represented is the test findings of embodiment 1,2 and comparative example 1.As indicated in table 1, for the comparative example 1 that has used non-crosslinked curing type refractive index integrated agent, only placing 24 hours its loss recruitments down at normal temperature (23 ± 2 ℃) just increases more than the 1dB, in contrast, for the embodiment 1,2 that has used crosslinking curing type refractive index integrate body 6, under 24 hours the situation of placement, its loss recruitment also keeps less than 0.1dB under normal temperature (23 ± 2 ℃), even after various humiture tests, also has good light-transfer characteristic.
Have again, after test, when taking embodiment 1,2 and comparative example 1 employed optical connector apart observe porous optical fiber (second optical fiber 12) hole portion, can confirm that the degree that non-crosslinked curing type refractive index integrated agent enters into wherein is that number mm is to tens mm, opposite with it, in the hole of embodiment 1,2 employed porous optical fibers (second optical fiber 12), can confirm, even under the situation of maximum, the degree that crosslinking curing type refractive index integrate body 6 enters also only is the thickness that adheres to.
Make changing attached to crosslinking curing type refractive index integrate body 6 thickness on one side end face, rear end of first optical fiber 11 of the first embodiment of the present invention, the mensuration of thickness (μ m) and the relation of loss recruitment (dB) of having measured the crosslinking curing type refractive index integrate body 6 of above-mentioned 2. temperature cycling test (40 ℃～70 ℃/6 hours * 10 times circulations) is illustrated in Figure 13.According to this result shown in Figure 13 as can be known, when the thickness of crosslinking curing type refractive index integrate body 6 reaches thinner than 10 μ m, the loss recruitment begins to increase, and reaches 5 μ m when following when the thickness of crosslinking curing type refractive index integrate body 6, and this loss recruitment is sharply increase then.In addition, if when the thickness of crosslinking curing type refractive index integrate body 6 reaches thicker than 35 μ m, the loss recruitment begins to increase, and reaches 50 μ m when above when the thickness of crosslinking curing type refractive index integrate body 6, and this loss recruitment is sharply increase then.In addition, in this temperature cycling test, the radius-of-curvature of the rear end one side end face 11a of employed first optical fiber 11 is 5mm.
As employed second optical fiber of optical connector of the present invention, not only can use porous optical fiber, also can use its inside not have the common optical fiber of periodic many hole portion.
Below, the third embodiment of the present invention is described.
As crosslinking curing type refractive index integrated agent, use is with 1.0 weight portion crosslinking chemicals (Nippon Polyurethane Industry Co., Ltd.'s system, trade name: コ ロ ネ one ト L) add the solution that mixes in 50% ethyl acetate solution, 100 weight portions of the acrylic resin that is made of n-butyl acrylate/methyl acrylate/acrylic acid/methacrylic acid 2-hydroxyl ethyl ester multipolymer (ratio of components is 82/15/2.7/0.3 (weight portion)) to.
To making the crosslinking curing type refractive index integrate body behind acrylic acid series jointing material coating fluid (the crosslinking curing type refractive index integrated agent) crosslinking curing that obtains like that as mentioned above, be 93-95% with the result of the transmittance of spectrophotometric determination 1300-1600nm wavelength region may.In addition, with Abbe refractomecer measure crosslinking curing type refractive index integrate body refractive index the result at normal temperatures (23 ± 2 ℃) be in 1.465 ± 0.005.
In addition, the result who measures the fracture elongation of crosslinking curing type refractive index integrate body is 200-300%, and the result who measures the bonding glass power of crosslinking curing type refractive index integrate body is 500-1000 gram/10mm width.
Used the crosslinking curing type refractive index integrate body 6 that obtains as mentioned above in the following manner.
Fig. 2 is the side view that is illustrated in an example of having adhered to the optical fiber 5 in the optical connector that becoming of crosslinking curing type refractive index integrate body be contained in embodiments of the invention on the end face.And Fig. 3 (b) is another routine enlarged drawing of the end of optical fiber 5 shown in Figure 2.
As shown in Figure 2, at first, remove optical fibre core 4 (Hitachi Cable Ltd.'s system, (external diameter is 250 μ m to trade name: BBG-SM-WF, fibre diameter is 125 ± 1 μ m) clad 200mm long, after the surface clean of the optical fiber that is made of glass 5 that will remove and peel off clad with alcohol is clean, with fiber cutter with the end cut of optical fiber 5 meet at right angles (angular error is below 1 °), after the radius-of-curvature of utilizing electrodischarge machining with fiber end face is processed into 1mm, glue the crosslinking curing type refractive index integrated agent that obtains as mentioned above and make its crosslinking curing (crosslinking curing that normal temperature is placed) by end face top-pour, thereby adhered to crosslinking curing type refractive index integrate body 6 (with reference to Fig. 3 (b)) at optical fiber 5.The thickness of crosslinking curing type refractive index integrate body 6 is 20-25 μ m.
Then, the optical fiber 5 that has adhered to crosslinking curing type refractive index integrate body 6 is cut, and insert in the optical connector 18 that constitutes by sleeve pipe 7, fiber optic connector 9 and shell 13 be fixed to as shown in Figure 4.Fiber optic connector 9 wherein is used for overlay 8 and is made plate 8 clip 10 that plays spring action of strong bonded each other by plate 8, is formed at wedge insertion groove 17 formations that are used to insert the groove 16 of second optical fiber on the plate 8 and are used to insert wedge 15.And, by front cutting optical fiber 5, the front end of sleeve pipe 7 is carried out milled processed at sleeve pipe 7, insert first optical fiber 11.10 optical connectors that are made into like this 18 have been prepared.
Secondly, remove porous optical fiber (Hitachi Cable Ltd.'s system as employed second optical fiber, 12 usefulness when optical fiber lays, (external diameter is 250 μ m to trade name: BBG-HF, fibre diameter is 125 ± 1 μ m) the clad of an end, with alcohol to the surface clean of second optical fiber 12 that constitutes by glass of having removed and peeled off clad clean after, with fiber cutter with the end cut of second optical fiber 12 meet at right angles (angular error is below 1 °), be inserted in the ready optical connector 18, utilize fiber optic connector 9 to connect.Fig. 8 is the sectional view that expression is inserted into an example of second optical fiber 12 in the fiber optic connector 9 of embodiments of the invention.
Following each amount is measured: just connected second optical fiber junction loss (dB) afterwards, reflection loss amount (dB), the loss recruitment that causes by following four kinds of tests that connects the loss recruitment (dB) after normal temperature (23 ± 2 ℃) is placed 24 hours down and connecting portion after second optical fiber 12, that is: (1) continuous temperature cyclic test (75 ℃/8 hours * 42 times circulations of 60 ℃ * humidity of 85 ℃ * 336 hours → temperature of temperature, 95% * 336 hour → temperature-40 ℃ ∽); (2) temperature cycling test (70 ℃/6 hours * 10 times circulations of temperature-40 ℃ ∽); (3) temperature humidity cyclic test (25 ℃ * humidity of 25 ℃ * humidity of temperature, 93%～temperature, 65 ℃ * humidity, 93%～temperature, 25 ℃ * humidity, 93%～temperature, 65 ℃ * humidity, 93%～temperature, 25 ℃ * humidity, 93%～temperature, 65 ℃ * humidity, 93%～temperature 93%) * 5 circulations); (4) (temperature conditions of various tests is shown in Fig. 9-Figure 12 to low-temperature test (temperature-40 ℃ * 240 hours).Use 5 that have prepared in 10 optical connectors 18 in the test (1), use remaining 5 test (2)～test (4) successively.Test (1)～test the table 2 that the results are shown in of (4).
What in addition, Fig. 5-Fig. 7 represented is that first optical fiber 11 is inserted the process that optical connector 18 backs connect with fiber optic connector 9.At first, be inserted on the plate 8 that constitutes fiber optic connector 9 in the formed wedge insertion groove 17 (with reference to Fig. 5) being formed at wedge 15 on the anchor clamps 14.Therefore then, second optical fiber 12 is inserted into and in the V-shaped groove 16 that enlarged, (with reference to Fig. 6 (b), Fig. 7) makes first optical fiber 11 be connected with second optical fiber 12.Though do not limit the shape of groove 16 is special, (section is the groove of V font) can obtain best characteristic during for V-shaped groove.This be because, when the end face of second optical fiber 12 is connected with the rear end one side end face 11a butt joint of first optical fiber 11, butt joint is connected not direct acting crosslinking curing type refractive index integrate body 6 just allow in the space in the V-shaped groove, can obtain good connection performance therefrom.
Below, the fourth embodiment of the present invention is described.
As crosslinking curing type refractive index integrated agent, the add-on type silicon of having prepared to be made of SD4590/BY24-741/SX212/ toluene (ratio of components is 100/1.0/0.9/50 (weight portion)) is jointing material coating fluid (SD4590, BY24-741, SRX212 are the products of eastern レ ダ ウ コ one ニ Application ゲ Co., Ltd. system).
Making the add-on type silicon that obtains as mentioned above with spectrophotometric determination is that crosslinking curing type refractive index integrate body behind jointing material coating fluid (the crosslinking curing type refractive index integrated agent) crosslinking curing is 92-94% in the result of the transmittance of 1300-1600nm wavelength region may.And under normal temperature (23 ± 2 ℃), be in 1.465 ± 0.005 with the result that Abbe refractomecer is measured the refractive index of crosslinking curing type refractive index integrate body.
In addition, the result who measures the fracture elongation of crosslinking curing type refractive index integrate body is 200-300%, and the result of the bonding glass power of mensuration crosslinking curing type refractive index integrate body is wide for 500-1000 gram/100mm.
Used the crosslinking curing type refractive index integrate body that obtains as mentioned above in the following manner.
Fig. 2 is the side view that is illustrated in an example of having adhered to the optical fiber 5 in the optical connector that becoming of crosslinking curing type refractive index integrate body be contained in embodiments of the invention on the end face.And Fig. 3 (b) is another routine enlarged drawing of the end of optical fiber 5 shown in Figure 2.
As shown in Figure 2, at first, remove optical fibre core 4 (Hitachi Cable Ltd.'s system, (external diameter is 250 μ m to trade name: BBG-SM-WF, fibre diameter is 125 ± 1 μ m) clad 200mm long, after the surface clean of the optical fiber that is made of glass 5 that will remove and peel off clad with alcohol is clean, with fiber cutter with the end cut of optical fiber 5 meet at right angles (angular error is below 1 °), after the radius-of-curvature of utilizing electrodischarge machining with fiber end face is processed into 15mm, glue the crosslinking curing type refractive index integrated agent that obtains as mentioned above and make its crosslinking curing (crosslinking curing that normal temperature is placed) by end face top-pour, thereby adhered to crosslinking curing type refractive index integrate body 6 (with reference to Fig. 3 (b)) at optical fiber 5.The thickness of crosslinking curing type refractive index integrate body 6 is 20-25 μ m.
Then, the optical fiber 5 that has adhered to crosslinking curing type refractive index integrate body 6 is cut, and insert in the optical connector 18 that constitutes by sleeve pipe 7, fiber optic connector 9 and shell 13 be fixed to as shown in Figure 4.Fiber optic connector 9 wherein is used for overlay 8 and is made plate 8 clip 10 that plays spring action of strong bonded each other by plate 8, is formed at wedge insertion groove 17 formations that are used to insert the groove 16 of second optical fiber on the plate 8 and are used to insert wedge 15.And, by front cutting optical fiber 5, the front end of sleeve pipe 7 is carried out milled processed at sleeve pipe 7, insert first optical fiber 11.10 optical connectors that are made into like this 18 have been prepared.
Use these optical connectors to carry out similarly to Example 1 and being connected of porous optical fiber (second optical fiber 12), test successively (1)～test (4).Test (1)～test the table 2 that the results are shown in of (4).In addition, Fig. 8 is the sectional view that expression is inserted into an example of second optical fiber 12 in the optical connector of embodiments of the invention.
Comparative example 2
Below, comparative example of the present invention is described.
As non-crosslinked curing type refractive index integrated agent, prepared OC-431A-LVP (Nye LubriCants.Inc system, refractive index 1.45).Then, used this non-crosslinked curing type refractive index integrated agent in the following manner.
Remove optical fibre core 4 (Hitachi Cable Ltd.'s system, (external diameter is 250 μ m to trade name: BBG-SM-WF, fibre diameter is 125 ± 1 μ m) clad 200mm long, with alcohol to the surface clean of the optical fiber that constitutes by glass 5 of having removed and peeled off clad clean after, meet at right angles (angular error is below 1 °) with the end cut of fiber cutter, and utilize electrodischarge machining that the radius-of-curvature of fiber end face is processed into 1mm optical fiber 5.
Then, optical fiber 5 is cut, and insert and to be fixed in the optical connector identical with optical connector shown in Figure 4 18.Then,, the front end of sleeve pipe is carried out milled processed, above-mentioned non-crosslinked curing type refractive index integrated agent is filled in the connecting portion of the optical fiber in the optical connector at the front cutting optical fiber 5 of sleeve pipe.Prepared the optical connector 22 (not shown) that is made into like this.
Use these optical connectors and embodiment 1,2 similarly to carry out and being connected of porous optical fiber (second optical fiber 12), test successively (1)～test (4).Test (1)～test the table 1 that the results are shown in of (4).In addition, Fig. 8 is the sectional view that expression is inserted into an example of second optical fiber 12 in the optical connector of comparative example of the present invention.
As follows to evaluation of test result.
What table 2 was represented is the test findings of embodiment 3,4 and comparative example 2.As indicated in table 2, for the comparative example 2 that has used non-crosslinked curing type refractive index integrated agent, only placing 24 hours its loss recruitments down at normal temperature (23 ± 2 ℃) just increases more than the 1dB, in contrast, for the embodiment 3,4 that has used crosslinking curing type refractive index integrate body 6, under 24 hours the situation of placement, its loss recruitment also keeps less than 0.1dB under normal temperature (23 ± 2 ℃), even after various humiture tests, also has good light-transfer characteristic.
In addition, compare with the embodiment 1 that the rear end one side end face 11a of first optical fiber 11 is not processed into sphere and has adhered to crosslinking curing type refractive index integrate body 6, the loss recruitment of the various humiture tests of embodiment 3 is very little, this can be interpreted as, in embodiment 3, be processed into sphere by rear end one side end face 11a with first optical fiber 11, and adhere to crosslinking curing type refractive index integrate body 6, with being connected of porous optical fiber (second optical fiber 12) in, can obtain more stable light-transfer characteristic.
Have again, after test, when taking embodiment 3,4 and comparative example 2 employed optical connectors apart observe porous optical fiber (second optical fiber 12) hole portion, can confirm that the degree that non-crosslinked curing type refractive index integrated agent enters into wherein is that number mm is to tens mm, opposite with it, in the hole of embodiment 3,4 employed porous optical fibers (second optical fiber 12), can confirm, even under the situation of maximum, the degree that crosslinking curing type refractive index integrate body 6 enters also only is the thickness that adheres to.
Make changing attached to crosslinking curing type refractive index integrate body 6 thickness on one side end face, rear end of first optical fiber 11 of the first embodiment of the present invention, the mensuration of thickness (μ m) and the relation of loss recruitment (dB) of having measured the crosslinking curing type refractive index integrate body 6 of above-mentioned 2. temperature cycling test (40 ℃～70 ℃/6 hours * 10 times circulations) is illustrated in Figure 14.According to this result shown in Figure 14 as can be known, when the thickness of crosslinking curing type refractive index integrate body 6 reaches thinner than 10 μ m, the loss recruitment begins to increase, and reaches 5 μ m when following when the thickness of crosslinking curing type refractive index integrate body 6, and this loss recruitment is sharply increase then.In addition, if when the thickness of crosslinking curing type refractive index integrate body 6 reaches thicker than 35 μ m, the loss recruitment begins to increase, and reaches 50 μ m when above when the thickness of crosslinking curing type refractive index integrate body 6, and this loss recruitment is sharply increase then.In addition, in this temperature cycling test, the radius-of-curvature of the rear end one side end face 11a of employed first optical fiber 11 is 5mm.
As employed second optical fiber of optical connector of the present invention, not only can use porous optical fiber, also can use its inside not have the common optical fiber of periodic many hole portion.
Table 2
| Embodiment | Comparative example 2 | |||
| 3 | 4 | |||
| Normal temperature (23 ± 2 ℃) (just having connected the back) | Junction loss (dB) | 0.05～0.2 | 0.00～0.02 | 0.1～0.4 |
| Reflection loss amount (dB) | -60～-50 | -55～-45 | -55～-45 | |
| Normal temperature (23 ± 2 ℃) (placing after 24 hours) | Loss recruitment (dB) | 0.00～0.02 | 0.00～0.03 | More than 1 |
| Continuous humiture cyclic test loss recruitment (dB) | 0.00～0.05 | 0.00～0.05 | More than 1 | |
| Temperature cycling test loss recruitment (dB) | 0.00～0.02 | 0.00～0.02 | More than 1 | |
| Humiture cyclic test loss recruitment (dB) | 0.00～0.02 | 0.00～0.02 | More than 1 | |
| Low-temperature test loss recruitment (dB) | 0.00～0.02 | 0.00～0.02 | More than 1 | |
Measure wavelength=1550nm, light source: light emitting diode (LED)
Claims (30)
1. optical connector, it has the sleeve pipe that is built-in with first optical fiber, with the fiber optic connector of the rear end that is connected this sleeve pipe, the end face of second optical fiber that inserts from rear end one side of this fiber optic connector docks with one side end face, rear end of above-mentioned first optical fiber and is formed by connecting, and it is characterized in that:
On one side end face, rear end of crosslinking curing type refractive index integrate body attached to above-mentioned first optical fiber, this crosslinking curing type refractive index integrate body forms the crosslinking curing type refractive index integrated agent crosslinking curing on one side end face, rear end that is coated on above-mentioned first optical fiber.
2. optical connector according to claim 1 is characterized in that:
Sphere is made in one side end face, rear end of above-mentioned first optical fiber.
3. optical connector according to claim 1 is characterized in that:
The refractive index of above-mentioned crosslinking curing type refractive index integrate body is in the 1.46+0.05.
4. optical connector according to claim 1 is characterized in that:
The change of refractive rate of above-mentioned crosslinking curing type refractive index integrate body is in ± 2% under one 40 ℃～70 ℃ conditions.
5. optical connector according to claim 1 is characterized in that:
The transmittance of above-mentioned crosslinking curing type refractive index integrate body is more than 80%.
6. optical connector according to claim 1 is characterized in that:
The fracture elongation of above-mentioned crosslinking curing type refractive index integrate body is more than 50%.
7. optical connector according to claim 1 is characterized in that:
The bonding glass power of above-mentioned crosslinking curing type refractive index integrate body is more than the 50 gram/100mm width.
8. optical connector according to claim 1 is characterized in that:
The thickness of above-mentioned crosslinking curing type refractive index integrate body is 5-100 μ m.
9. optical connector according to claim 1 is characterized in that:
The surface of the above-mentioned crosslinking curing type refractive index integrate body that is connected with the end face of second optical fiber that inserts from rear end one side of above-mentioned fiber optic connector is a dome shape.
10. optical connector according to claim 1 is characterized in that:
Above-mentioned crosslinking curing type refractive index integrate body is only on the end face attached to first optical fiber.
11. optical connector according to claim 1 is characterized in that:
Above-mentioned crosslinking curing type refractive index integrate body from the end face of first optical fiber along side attachment.
12. optical connector according to claim 2 is characterized in that:
One side end face, rear end of above-mentioned first optical fiber is that radius-of-curvature is the sphere of 0.1～30mm.
13. go up optical connector according to claim 1, it is characterized in that:
Above-mentioned fiber optic connector has the groove that forms with the bigger area of the basal area of second optical fiber that inserts than one side from its rear end.
14. optical connector according to claim 13 is characterized in that:
Above-mentioned groove is a V-shaped groove.
15. optical connector according to claim 1 is characterized in that:
Above-mentioned second optical fiber is porous optical fiber.
16. the syndeton of an optical fiber, it possesses: first optical fiber, above-mentioned first optical fiber is inserted its inner sleeve pipe, be connected the fiber optic connector of the rear end of this sleeve pipe, from rear end one side of this fiber optic connector be inserted into wherein second optical fiber and attached to the crosslinking curing type refractive index integrate body of one side end face, the above-mentioned first optical fiber rear end, it is characterized in that:
One side end face, rear end of first optical fiber and the butt joint of the end face of second optical fiber are connected,
This crosslinking curing type refractive index integrate body forms by making the crosslinking curing type refractive index integrated agent crosslinking curing on one side end face, rear end that is coated on above-mentioned first optical fiber.
17. the syndeton according to the optical fiber of claim 16 is characterized in that:
Sphere is made in one side end face, rear end of above-mentioned first optical fiber.
18. the syndeton according to the optical fiber of claim 16 is characterized in that:
The refractive index of above-mentioned crosslinking curing type refractive index integrate body is in 1.46 ± 0.05.
19. the syndeton according to the optical fiber of claim 16 is characterized in that:
The change of refractive rate of above-mentioned crosslinking curing type refractive index integrate body is in ± 2% under one 40 ℃～70 ℃ conditions.
20. the syndeton according to the optical fiber of claim 16 is characterized in that:
The transmittance of above-mentioned crosslinking curing type refractive index integrate body is more than 80%.
21. the syndeton according to the optical fiber of claim 16 is characterized in that:
The fracture elongation of above-mentioned crosslinking curing type refractive index integrate body is more than 50%.
22. the syndeton according to the optical fiber of claim 16 is characterized in that:
The bonding glass power of above-mentioned crosslinking curing type refractive index integrate body is more than the 50 gram/100mm width.
23. the syndeton according to the optical fiber of claim 16 is characterized in that:
The thickness of above-mentioned crosslinking curing type refractive index integrate body is 5-100 μ m.
24. the syndeton according to the optical fiber of claim 16 is characterized in that:
The surface of the above-mentioned crosslinking curing type refractive index integrate body that is connected with the end face of second optical fiber that inserts from rear end one side of above-mentioned fiber optic connector is a dome shape.
25. the syndeton according to the optical fiber of claim 16 is characterized in that:
Above-mentioned crosslinking curing type refractive index integrate body is only on the end face attached to first optical fiber.
26. the syndeton according to the optical fiber of claim 16 is characterized in that:
Above-mentioned crosslinking curing type refractive index integrate body from the end face of first optical fiber along side attachment.
27. the syndeton according to the optical fiber of claim 17 is characterized in that:
One side end face, rear end of above-mentioned first optical fiber is that radius-of-curvature is the sphere of 0.1～30mm.
28. the syndeton according to the optical fiber of claim 16 is characterized in that:
Above-mentioned fiber optic connector has the bigger groove of basal area that is formed with second optical fiber that inserts than one side from its rear end.
29. the syndeton according to the optical fiber of claim 28 is characterized in that:
Above-mentioned groove is a V-shaped groove.
30. the syndeton according to the optical fiber of claim 16 is characterized in that:
Above-mentioned second optical fiber is porous optical fiber.
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| JP2006044340 | 2006-02-21 | ||
| JP2006044340A JP2007225722A (en) | 2006-02-21 | 2006-02-21 | Optical connector |
| JP2006044724 | 2006-02-22 |
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| CN101025461A true CN101025461A (en) | 2007-08-29 |
| CN100465679C CN100465679C (en) | 2009-03-04 |
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| CNB2007100788414A Expired - Fee Related CN100465679C (en) | 2006-02-21 | 2007-02-16 | Optical connector and connection structure of optical fibers |
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| CN (1) | CN100465679C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7805035B2 (en) | 2006-07-31 | 2010-09-28 | Hitachi Cable, Ltd. | Forming method of refractive index matching film |
| CN101995614A (en) * | 2009-08-03 | 2011-03-30 | 矢崎总业株式会社 | Fibre optical connector with ferrule end faces in non-contact state |
| CN102681103A (en) * | 2011-03-04 | 2012-09-19 | 索尼公司 | Optical fiber component, manufacturing method thereof, optical fiber and lens substrate assembly, and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6383617B2 (en) * | 2014-09-11 | 2018-08-29 | 株式会社フジクラ | Optical fiber connection structure, optical fiber connector |
| CN113050223A (en) * | 2019-12-26 | 2021-06-29 | 中兴通讯股份有限公司 | Polymer waveguide connector, manufacturing method thereof and connector set |
| CN117310893B (en) * | 2023-11-28 | 2024-03-01 | 惠州市飞博康实业有限公司 | SC connector stable in structure and easy to install |
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| US5870514A (en) * | 1993-05-14 | 1999-02-09 | National Research Council Of Canada | Optical in-line elements in fiber optic systems |
| CN1187631C (en) * | 1997-05-15 | 2005-02-02 | 西门子公司 | Protective device for power outlet for optical fiber |
| US6210047B1 (en) * | 2000-02-04 | 2001-04-03 | Molex Incorporated | Method of fabricating a fiber optic connector ferrule |
| US20030185520A1 (en) * | 2002-03-26 | 2003-10-02 | Bookbinder Dana C. | Device and method for coupling optical fibers |
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2006
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7805035B2 (en) | 2006-07-31 | 2010-09-28 | Hitachi Cable, Ltd. | Forming method of refractive index matching film |
| CN101995614A (en) * | 2009-08-03 | 2011-03-30 | 矢崎总业株式会社 | Fibre optical connector with ferrule end faces in non-contact state |
| CN102681103A (en) * | 2011-03-04 | 2012-09-19 | 索尼公司 | Optical fiber component, manufacturing method thereof, optical fiber and lens substrate assembly, and manufacturing method thereof |
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| Publication number | Publication date |
|---|---|
| JP2007225722A (en) | 2007-09-06 |
| CN100465679C (en) | 2009-03-04 |
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