JPH1048466A - Adhesive for optical connector, and ferrule and optical connector using that - Google Patents
Adhesive for optical connector, and ferrule and optical connector using thatInfo
- Publication number
- JPH1048466A JPH1048466A JP20231496A JP20231496A JPH1048466A JP H1048466 A JPH1048466 A JP H1048466A JP 20231496 A JP20231496 A JP 20231496A JP 20231496 A JP20231496 A JP 20231496A JP H1048466 A JPH1048466 A JP H1048466A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- optical fiber
- ferrule
- filler
- insertion hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光コネクタのフェ
ルールに光ファイバを接着固定するための光コネクタ用
接着剤並びにそれを用いたフェルールおよび光コネクタ
に関する。The present invention relates to an adhesive for an optical connector for adhesively fixing an optical fiber to a ferrule of an optical connector, and a ferrule and an optical connector using the same.
【０００２】[0002]
【従来の技術】光通信等において光ファイバ同士の接続
に使用される光コネクタには光ファイバの先端部を固定
するためのフェルールが組み込まれている。フェルール
は通常、ジルコニア等のセラミック製であり、光ファイ
バを挿入して接着剤で固定するための光ファイバ挿入孔
を有する。2. Description of the Related Art A ferrule for fixing a tip of an optical fiber is incorporated in an optical connector used for connecting optical fibers in optical communication or the like. The ferrule is usually made of ceramic such as zirconia, and has an optical fiber insertion hole for inserting an optical fiber and fixing it with an adhesive.
【０００３】図３には、一般的なフェルールの概略構成
を示す。図３（Ａ）に示すように、フェルール１０Ａ
は、通常、主にジルコニアなどのセラミックからなる筒
状体２０Ａと、ステンレス製のつば３０とからなり、筒
状体２０Ａには光ファイバ挿入孔２１Ａが形成されてい
る。光ファイバ挿入孔２１Ａは一般に、被覆を除去した
光ファイバの直径１２５μｍに対して約１μｍ程度のク
リアランスを有する直径で、長さ１０ｍｍ程度の貫通し
た孔であり、この光ファイバ挿入孔２１Ａの光ファイバ
挿入側にはテーパ状に径が漸大するテーパ部２２Ａが形
成されている。また、つば３０にはテーパ部２２Ａに連
通する貫通孔３１が形成されている。そして、このよう
なフェルール１０Ａに光ファイバを取り付ける場合、光
ファイバ挿入孔２１Ａ中に接着剤を充填し、この光ファ
イバ挿入孔２１Ａに光ファイバ心線４０の被覆を除去し
た光ファイバ４１を挿入した後、接着剤を硬化させて光
ファイバ４１をフェルール１０Ａに固定する。その後、
筒状体２０Ａの端面を光ファイバ４１と共に研磨して光
コネクタに組み込む。FIG. 3 shows a schematic configuration of a general ferrule. As shown in FIG. 3A, the ferrule 10A
Is usually composed of a cylindrical body 20A mainly made of ceramic such as zirconia and a brim 30 made of stainless steel, and an optical fiber insertion hole 21A is formed in the cylindrical body 20A. The optical fiber insertion hole 21A is generally a through hole having a diameter of about 1 μm and a length of about 10 mm having a clearance of about 1 μm with respect to a diameter of 125 μm of the optical fiber from which the coating is removed. On the insertion side, a tapered portion 22A whose diameter gradually increases in a tapered shape is formed. The flange 30 is formed with a through hole 31 communicating with the tapered portion 22A. When an optical fiber is attached to such a ferrule 10A, an adhesive is filled in the optical fiber insertion hole 21A, and the optical fiber 41 from which the coating of the optical fiber 40 has been removed is inserted into the optical fiber insertion hole 21A. Thereafter, the adhesive is cured to fix the optical fiber 41 to the ferrule 10A. afterwards,
The end face of the cylindrical body 20A is polished together with the optical fiber 41 and incorporated into an optical connector.
【０００４】このとき、光ファイバ心線４０の被覆を除
去した光ファイバ４１の長さＬ1 は、少なくとも光ファ
イバ挿入孔２１Ａの長さ１０ｍｍより長くなければなら
ず、被覆除去作業が大変なばかりでなく、光ファイバ挿
入孔２１Ａへの光ファイバ４１の挿入も慎重にしなけれ
ばならないという問題がある。また、筒状体２０Ａに形
成される光ファイバ挿入孔２１Ａは射出成形後、通常内
面を研磨加工が施されるが、その研磨作業に非常に時間
がかかるという問題もある。At this time, the length L1 of the optical fiber 41 from which the coating of the optical fiber core wire 40 has been removed must be longer than at least the length of the optical fiber insertion hole 21A of 10 mm. In addition, there is a problem that the optical fiber 41 must be carefully inserted into the optical fiber insertion hole 21A. Further, the inner surface of the optical fiber insertion hole 21A formed in the cylindrical body 20A is usually polished after injection molding, but there is a problem that the polishing operation takes a very long time.
【０００５】そこで、図３（Ｂ）に示すように、光ファ
イバ挿入孔の長さを短くしたフェルール提案されてい
る。すなわち、一例としてこのフェルール１０Ｂは、長
さが３ｍｍの光ファイバ挿入孔２１Ｂおよびテーパ部２
２Ｂを有し、さらにテーパ部２２Ｂに連通する光ファイ
バ心線挿入孔２３Ｂを有する。このようなフェルール１
０Ｂを光ファイバに取り付ける場合、光ファイバ心線４
０の被覆を除去した光ファイバ４１の長さＬ2 が短くて
済み、また、光ファイバ４１を光ファイバ挿入孔２１Ｂ
へ挿入する作業も非常に容易である。さらに、光ファイ
バ挿入孔２１Ｂの内面の研磨仕上げ加工時間も、上述し
た場合の１／３以下に低減することができる。Therefore, as shown in FIG. 3B, there has been proposed a ferrule in which the length of the optical fiber insertion hole is shortened. That is, as an example, the ferrule 10B includes the optical fiber insertion hole 21B having a length of 3 mm and the tapered portion 2B.
2B, and further has an optical fiber insertion hole 23B communicating with the tapered portion 22B. Such a ferrule 1
0B is attached to the optical fiber, the optical fiber core 4
The length L2 of the optical fiber 41 from which the coating of No. 0 has been removed may be short, and the optical fiber 41 may be inserted into the optical fiber insertion hole 21B.
It is very easy to insert it into the device. Further, the polishing finishing time of the inner surface of the optical fiber insertion hole 21B can be reduced to 1/3 or less of the case described above.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上述し
たフェルール１０Ｂでは、接着剤を介して光ファイバ４
１を固定する部分が非常に短いために接着剤の固定強度
が十分でなく、温度および湿度の変化により光ファイバ
４１の先端がフェルール１０Ｂの筒状体２０Ｂ内で軸方
向に微小に動いてしまうという問題がある。このように
光ファイバ４１が筒状体２０Ｂ内で微小移動してしまう
と、例えば、光コネクタ同士を対向接続している場合に
は、対向接続される光ファイバ間に微小な隙間が生じる
ことになり、特に反射損失等のコネクタ性能を著しく劣
化させることになる。例えば、通常、−４０℃〜８０℃
の温度条件下で許容される光ファイバの先端の移動距離
は、０．０５μｍ以下である。However, in the above-described ferrule 10B, the optical fiber 4 is provided via an adhesive.
Since the portion for fixing 1 is very short, the fixing strength of the adhesive is not sufficient, and the tip of the optical fiber 41 slightly moves in the axial direction within the cylindrical body 20B of the ferrule 10B due to changes in temperature and humidity. There is a problem. If the optical fiber 41 moves minutely in the tubular body 20B as described above, for example, when optical connectors are connected to each other, a minute gap is generated between the optical fibers connected to each other. In particular, connector performance such as reflection loss is significantly deteriorated. For example, usually -40 ° C to 80 ° C
The allowable moving distance of the tip of the optical fiber under the above temperature condition is 0.05 μm or less.
【０００７】ところで、従来より光ファイバの固定に用
いられる接着剤としては、硬化前は低粘度であり、小径
の孔にも充填できること、接着固定強度に優れているこ
と、耐温度、耐湿度、耐薬品等の耐環境性の信頼性に優
れていること、短時間で硬化でき、固定強度が増大でき
ることなどの理由から、エポキシ系接着剤が用いられて
いる。しかしながら、エポキシ系接着剤を用いても、光
ファイバ挿入孔の長さが３ｍｍと極端に短いと、十分な
固定強度が確保できないことになる。[0007] By the way, adhesives conventionally used for fixing optical fibers have low viscosity before curing and can be filled into small-diameter holes, have excellent adhesive fixing strength, and have high temperature resistance, humidity resistance, and the like. Epoxy-based adhesives are used because they are excellent in reliability of environmental resistance such as chemical resistance, can be cured in a short time, and can increase fixing strength. However, even if an epoxy-based adhesive is used, if the length of the optical fiber insertion hole is extremely short, such as 3 mm, sufficient fixing strength cannot be secured.
【０００８】本発明は、このような事情に鑑み、光ファ
イバ挿入孔が短いフェルールの場合でも光ファイバを十
分な信頼性を持って強固にフェルールに接着固定するこ
とができる光コネクタ用接着剤並びにそれを用いたフェ
ルールおよび光コネクタを提供することを課題とする。In view of such circumstances, the present invention provides an adhesive for an optical connector which can firmly adhere and fix an optical fiber to a ferrule with sufficient reliability even when a ferrule having a short optical fiber insertion hole is provided. It is an object to provide a ferrule and an optical connector using the same.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決する本発
明の第１の態様は、フェルールに光ファイバを接着固定
するための接着剤であって、接着剤中に１〜１０重量％
のフィラーを含有することを特徴とする光コネクタ用接
着剤にある。According to a first aspect of the present invention, there is provided an adhesive for bonding and fixing an optical fiber to a ferrule, wherein 1 to 10% by weight of the adhesive is contained in the adhesive.
An adhesive for optical connectors characterized by containing the following filler.
【００１０】ここで、前記フィラーの平均粒子径は、例
えば、０．００５〜１μｍの範囲にある。また、前記フ
ィラー添加により当該接着剤の線膨張係数が前記フェル
ールおよび前記光ファイバの線膨張係数に近くなってい
るのがよい。The average particle diameter of the filler is, for example, in the range of 0.005 to 1 μm. Preferably, the linear expansion coefficient of the adhesive is close to the linear expansion coefficients of the ferrule and the optical fiber due to the addition of the filler.
【００１１】また、前記接着剤は、例えば、エポキシ系
接着剤からなる。本発明の第２の態様は、前記光コネク
タ用接着剤を用いて、光ファイバ挿入孔に挿入された光
ファイバの先端部が接着固定されていることを特徴とす
るフェルールにある。The adhesive is made of, for example, an epoxy adhesive. According to a second aspect of the present invention, there is provided a ferrule, wherein an end of an optical fiber inserted into an optical fiber insertion hole is adhered and fixed using the optical connector adhesive.
【００１２】ここで、前記光ファイバ挿入孔の長さが３
ｍｍ以下であってもよい。本発明の第３の態様は、前記
フェルールを有することを特徴とする光コネクタにあ
る。本発明は、従来から使用されている光コネクタ用接
着剤、特にエポキシ系接着剤に、フィラーを１〜１０重
量％、好ましくは２〜１０重量％、特に好ましくは２〜
５重量％添加することにより、温度および湿度の環境変
化があっても固定強度が劣化しにくい接着剤を得るもの
である。フィラーの添加量が上記範囲より少ない場合に
は本発明の効果が顕著には得られ難く、上記範囲より多
い場合には粘度が大きくなって光ファイバ挿入孔に充填
し難くなり、共に好ましくない。Here, the length of the optical fiber insertion hole is 3
mm or less. According to a third aspect of the present invention, there is provided an optical connector including the ferrule. The present invention relates to a conventional adhesive for optical connectors, particularly an epoxy-based adhesive, in which a filler is added in an amount of 1 to 10% by weight, preferably 2 to 10% by weight, particularly preferably 2 to 10% by weight.
By adding 5% by weight, it is possible to obtain an adhesive whose fixing strength is hardly deteriorated even when there are environmental changes in temperature and humidity. If the amount of the filler is less than the above range, the effect of the present invention cannot be obtained remarkably. If the amount is more than the above range, the viscosity becomes so large that it becomes difficult to fill the optical fiber insertion hole, which is not preferable.
【００１３】本発明で用いることができるフィラーは、
シリカ、ジルコニア、アルミナ、カーボンなど接着剤と
混合しやすく且つ馴染みやすく、また、フェルールなど
とともに研磨しやすいものであればよい。接着剤、特
に、エポキシ系接着剤と混合しやすく且つ馴染みやす
く、また、線膨張係数が小さくて接着剤全体の線膨張係
数を小さくするなどの点を考慮すると、シリカが特に好
ましい。The filler that can be used in the present invention is:
Any material, such as silica, zirconia, alumina, or carbon, may be used as long as it can be easily mixed with an adhesive and can be easily used, and can be easily polished together with a ferrule. Silica is particularly preferred in consideration of easy mixing with and familiarity with an adhesive, particularly an epoxy-based adhesive, and low linear expansion coefficient and low linear expansion coefficient of the entire adhesive.
【００１４】また、本発明で用いるフィラーの粒径は、
平均粒径で０．００５〜１μｍ程度、好ましくは０．０
１〜０．１μｍ程度がよい。粒径が小さすぎると取り扱
い難くなると共に本発明の効果が顕著に発揮され難くな
り、一方、粒径が大きすぎると、接着剤が取り扱い難く
なるとともに本発明の効果も顕著に発揮され難くなり、
共に好ましくない。The particle size of the filler used in the present invention is as follows:
The average particle size is about 0.005 to 1 μm, preferably 0.0
It is preferably about 1 to 0.1 μm. If the particle size is too small, it becomes difficult to handle and the effect of the present invention is hardly remarkably exhibited.
Both are not preferred.
【００１５】本発明で用いることが接着剤は、従来から
フェルール接着用に用いることができるものであればよ
く、エポキシ系接着剤の他、シリコーン系接着剤、アク
リル系接着剤を挙げることができる。光ファイバ挿入孔
への充填性、接着固定強度、耐環境性、硬化特性等を考
慮すると、エポキシ系接着剤が特に好ましい。The adhesive used in the present invention may be any adhesive that can be conventionally used for ferrule bonding. Examples of the adhesive include a silicone adhesive and an acrylic adhesive in addition to an epoxy adhesive. . Epoxy adhesives are particularly preferable in consideration of the filling property into the optical fiber insertion hole, adhesive fixing strength, environmental resistance, curing characteristics, and the like.
【００１６】本発明ではこのような接着剤に上述したよ
うなフィラーを混合することにより、光ファイバ挿入孔
の長さが、例えば、３ｍｍと短いフェルールに用いても
十分な固定強度を得ることができる光コネクタ用接着剤
を提供するものである。本発明の光コネクタ用接着剤
は、従来の接着剤と同様に用いてより優れた固定強度を
得ることができる。すなわち、フェルールの光ファイバ
挿入孔に充填し、光ファイバを挿入した後、硬化し、そ
の後、フェルール先端を研磨することによりフェルール
を得ることができる。本発明の光コネクタ用接着剤を用
いることにより従来の接着剤と比較して非常に長期安定
性に優れた固定強度を得ることができるので、フェルー
ルの光ファイバ挿入孔の長さを、従来では不可能とされ
ていた３ｍｍ以下としても、十分に実用に耐える固定強
度を得ることができる。In the present invention, by mixing the above-mentioned filler into such an adhesive, it is possible to obtain a sufficient fixing strength even when used for a ferrule having a short optical fiber insertion hole length of, for example, 3 mm. The present invention provides an adhesive for an optical connector that can be used. The adhesive for an optical connector of the present invention can be used in the same manner as a conventional adhesive to obtain a higher fixing strength. That is, the ferrule can be obtained by filling the optical fiber insertion hole of the ferrule, inserting the optical fiber, curing the ferrule, and then polishing the ferrule tip. By using the adhesive for an optical connector of the present invention, it is possible to obtain a fixing strength with excellent long-term stability as compared with a conventional adhesive, so that the length of the optical fiber insertion hole of the ferrule is conventionally reduced. Even if it is 3 mm or less, which has been considered impossible, it is possible to obtain sufficient fixing strength for practical use.
【００１７】またこのフェルールを各種の光コネクタに
組み込むことにより各種の光コネクタを得ることができ
る。なお、本発明のフェルールは、光コネクタと別部品
として提供されるものでも、光コネクタ部品とアセンブ
リされたフェルールであってもよい。By incorporating the ferrule into various optical connectors, various optical connectors can be obtained. The ferrule of the present invention may be provided as a component separate from the optical connector, or may be a ferrule assembled with the optical connector component.
【００１８】また、本発明の光コネクタ用接着剤の硬化
処理は、従来と同様でよいが、例えば、特にエポキシ系
接着剤を用いた場合には、比較的低い温度条件から十分
に硬化が進む温度まで２〜３段階で加熱し、その後、一
段低い温度で硬化を完了するようにすると、さらに優れ
た固定強度を得ることができる。The curing treatment of the adhesive for an optical connector of the present invention may be the same as the conventional one. For example, when an epoxy-based adhesive is used, curing proceeds sufficiently from a relatively low temperature condition. Heating to a temperature in two or three steps, and then completing the curing at one step lower temperature can provide even better fixing strength.
【００１９】なお、特開平６−２２８５１５号公報およ
び特開平７−１４５３６０号公報には、フェルールに光
ファイバを取り付ける固定するための接着剤で、フィラ
ーを含有するものが開示されている。しかしながら、両
者とも含有量が２０重量％以上、７０重量％以下であ
り、本発明のものとは大きく異なる。これは、両者とも
多心光コネクタ用の接着剤を目的とするものであり、硬
化温度から常温に冷却する際の収縮あるいは硬化時の収
縮によりフェルールが変形したり光ファイバが応力を受
けたりするのを防止するためのものであり、本発明とは
技術目的が全く異なるからである。JP-A-6-228515 and JP-A-7-145360 disclose adhesives for fixing an optical fiber to a ferrule and containing a filler. However, both have a content of not less than 20% by weight and not more than 70% by weight, which are greatly different from those of the present invention. This is intended for an adhesive for a multi-core optical connector, and the ferrule is deformed or the optical fiber receives stress due to shrinkage during cooling from a curing temperature to room temperature or shrinkage during curing. This is because the technical purpose is completely different from the present invention.
【００２０】[0020]
【発明の実施の形態】以下、本発明を実施例に基づいて
説明するが、本発明はこれに限定されるものではない。 （実施例）エポキシ接着剤であるエポテック３５３ＮＤ
（商品名；エポテック社製）に、平均粒子径０．０１５
μｍのシリカ微粉末を１、２、５および１０重量％それ
ぞれ混合して、４種の光コネクタ用接着剤を製造した。
なお、各接着剤の粘度は、フェルールの光ファイバ挿入
孔に充填作業に支障のないものであったが、シリカを１
０重量％含有するものは、取り扱い上ほぼ限度に近い粘
度を有していた。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments, but the present invention is not limited to these embodiments. (Example) Epotek 353ND which is an epoxy adhesive
(Trade name; manufactured by Epotek Co., Ltd.)
By mixing 1, 2, 5, and 10% by weight of a silica fine powder having a thickness of μm, four types of adhesives for optical connectors were manufactured.
The viscosity of each adhesive was such that the filling operation of the optical fiber insertion hole of the ferrule was not hindered.
Those containing 0% by weight had a viscosity almost at the limit in handling.
【００２１】各光コネクタ用接着剤を用いて以下の通り
フェルールに光ファイバを固定した。フェルールとして
は、上述した図３（Ｂ）に示すように、直径０．１２６
μｍ、長さ３ｍｍの光ファイバ挿入孔を有するジルコニ
ア製フェルールを用いた。各フェルールに各光コネクタ
用接着剤を充填して光ファイバを挿入した後、光コネク
タ用接着剤を硬化させた。硬化条件は、５０℃で１０
分、８０℃で１５分、１２０℃で１５分、５０℃で１５
分の４段階硬化とした。An optical fiber was fixed to a ferrule using the adhesive for each optical connector as follows. The ferrule has a diameter of 0.126 as shown in FIG.
A zirconia ferrule having an optical fiber insertion hole having a length of 3 mm and a length of 3 mm was used. Each of the ferrules was filled with an adhesive for an optical connector and an optical fiber was inserted, and then the adhesive for an optical connector was cured. The curing condition is 10 at 50 ° C.
Min, 80 ° C for 15 minutes, 120 ° C for 15 minutes, 50 ° C for 15 minutes
And four-stage curing.
【００２２】なお、比較のため、シリカを混入しない同
様のエポキシ接着剤を用い、同様にフェルールを作製し
た。さらに、各フェルールをＳＣコネクタに組み込ん
で、１．２ｍの光ファイバ心線を有するＳＣコネクタを
得た。For comparison, a ferrule was prepared in the same manner using a similar epoxy adhesive containing no silica. Further, each ferrule was incorporated into an SC connector to obtain an SC connector having a 1.2 m optical fiber core.
【００２３】（試験例１）各実施例の２本ずつ２組のＳ
Ｃコネクタを金属スリーブのアダプタを介して対向接続
し、湿度９３％の環境化で、一日の温度変化が−１０℃
〜６５℃の負荷（図１および図２参照）を１０日間実施
した後のフェルール端面に対する光ファイバ端面の凹み
量を測定し、これを温度変化負荷前の値と比較した。こ
の結果は表１に示す。(Test Example 1) Two sets of S in each embodiment were used.
The C connector is connected to each other via a metal sleeve adapter, and the temperature changes in a day of -10 ° C in an environment with a humidity of 93%.
After a load of up to 65 ° C. (see FIGS. 1 and 2) was applied for 10 days, the amount of depression of the optical fiber end face with respect to the ferrule end face was measured, and this was compared with the value before the temperature change load. The results are shown in Table 1.
【００２４】この結果より、フィラーを混入した本実施
例の光コネクタ用接着剤を用いたものは、フェルールの
移動量が十分に小さく、要求規格である０．０５μｍ
（５０ｎｍ）以下であった。これに対し、エポキシ接着
剤のみを用いた比較例は要求規格を満足できないもので
あった。From these results, it was found that the adhesive using the adhesive for optical connector of this embodiment mixed with the filler had a sufficiently small amount of movement of the ferrule, and the required standard of 0.05 μm was used.
(50 nm) or less. On the other hand, the comparative example using only the epoxy adhesive could not satisfy the required standard.
【００２５】[0025]
【表１】 また、この時の各フィラー混合比に対する接着剤の粘度
を表２に又、そのグラフを図４に示す。Ｓｐは粘度セン
サーの回転速度であり、単位はｒｍｓである。フィラー
の混合比が増すにつれて粘度が増すのがわかる。[Table 1] Table 2 shows the viscosity of the adhesive with respect to each filler mixing ratio at this time, and FIG. 4 is a graph thereof. Sp is the rotation speed of the viscosity sensor, and the unit is rms. It can be seen that the viscosity increases as the mixing ratio of the filler increases.
【００２６】[0026]
【表２】 （試験例２）試験例と同様に、フィラーを５重量％およ
び１０重量％含有する光コネクタ用接着剤を用いたＳＣ
コネクタを対向接続した状態で、試験例１と同様に温度
変化負荷をかけてながら、各対向接続部の反射減衰量を
常時モニターした。この結果は図１に示す。また、比較
のため、フィラーを含有しない光コネクタ用接着剤を用
いた比較例についても同様に反射減衰量を測定した。こ
の結果は図２に示す。[Table 2] (Test Example 2) An SC using an adhesive for an optical connector containing 5% by weight and 10% by weight of a filler as in the test example.
With the connectors facing each other, the return loss of each facing connection was constantly monitored while applying a temperature change load as in Test Example 1. The result is shown in FIG. For comparison, the return loss was measured in the same manner for a comparative example using an optical connector adhesive containing no filler. The result is shown in FIG.
【００２７】この結果より、本実施例の光コネクタ接着
剤を使用したものは、十分に耐久性のある優れた固着強
度を有しているため、反射減衰量が常に安定していた
が、比較例のものは温度変化と共に反射減衰量が大きく
変化してしまった。From these results, it was found that the one using the optical connector adhesive of this embodiment had a sufficiently durable and excellent fixing strength, so that the return loss was always stable. In the example, the return loss greatly changed with the temperature change.
【００２８】[0028]
【発明の効果】以上説明したように、本発明によれば、
接着剤に所定量のフィラーを混合することにより、長期
耐久性に優れた強固な固着強度を得ることができる光コ
ネクタ用接着剤を得ることができる。また、この光コネ
クタ用接着剤を用いることにより、光ファイバ挿入孔が
従来の１／３の３ｍｍ以下としても十分に耐久性のある
固着強度を有するフェルールおよび光コネクタを得るこ
とができ、さらに従来の標準フェルールに用いると、よ
り長期的に安定した高性能のフェルールおよび光コネク
タを得ることができる。As described above, according to the present invention,
By mixing a predetermined amount of filler into the adhesive, it is possible to obtain an optical connector adhesive capable of obtaining a strong fixing strength with excellent long-term durability. Further, by using this adhesive for optical connectors, it is possible to obtain a ferrule and an optical connector having a sufficiently strong fixing strength even when the optical fiber insertion hole is 3 mm or less of the conventional optical fiber insertion hole. , It is possible to obtain a high-performance ferrule and optical connector that are stable over a long period of time.
【図１】本発明の試験例２の結果を示す図である。FIG. 1 is a diagram showing the results of Test Example 2 of the present invention.
【図２】従来の発明の試験例２の結果を示す図である。FIG. 2 is a diagram showing the results of Test Example 2 of the conventional invention.
【図３】フェルールの概略構成を示す図でり、（Ａ）は
標準フェルール、（Ｂ）は光ファイバ挿入孔が短いフェ
ルールを示す。3A and 3B are diagrams showing a schematic configuration of a ferrule, wherein FIG. 3A shows a standard ferrule, and FIG. 3B shows a ferrule having a short optical fiber insertion hole.
【図４】フィラー混入比に対する接着剤の粘度を示すグ
ラフ。FIG. 4 is a graph showing a viscosity of an adhesive with respect to a filler mixing ratio.
１０Ａ，１０Ｂ フェルール ２０Ａ，２０Ｂ 筒状体 ２１Ａ，２１Ｂ 光ファイバ挿入孔 ３０ つば ４０ 光ファイバ心線 ４１ 光ファイバ 10A, 10B Ferrule 20A, 20B Cylindrical body 21A, 21B Optical fiber insertion hole 30 Collar 40 Optical fiber core 41 Optical fiber
Claims (6)
ための接着剤であって、接着剤中に１〜１０重量％のフ
ィラーを含有することを特徴とする光コネクタ用接着
剤。1. An adhesive for an optical connector, comprising: an adhesive for adhering and fixing an optical fiber to a ferrule, wherein the adhesive contains 1 to 10% by weight of a filler.
粒子径が、０．００５〜１μｍの範囲にあることを特徴
とする光コネクタ用接着剤。2. The adhesive for an optical connector according to claim 1, wherein the average particle size of the filler is in a range of 0.005 to 1 μm.
が、エポキシ系接着剤からなることを特徴とする光コネ
クタ用接着剤。3. The adhesive for an optical connector according to claim 1, wherein the adhesive comprises an epoxy-based adhesive.
着剤を用いて、光ファイバ挿入孔に挿入された光ファイ
バの先端部が接着固定されていることを特徴とするフェ
ルール。4. A ferrule, wherein the tip of an optical fiber inserted into an optical fiber insertion hole is adhered and fixed using the adhesive for an optical connector according to claim 1.
孔の長さが３ｍｍ以下であることを特徴とするフェルー
ル。5. The ferrule according to claim 4, wherein the length of the optical fiber insertion hole is 3 mm or less.
有することを特徴とする光コネクタ。6. An optical connector comprising the ferrule according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20231496A JP3278577B2 (en) | 1996-07-31 | 1996-07-31 | Adhesive for optical connector and ferrule and optical connector using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20231496A JP3278577B2 (en) | 1996-07-31 | 1996-07-31 | Adhesive for optical connector and ferrule and optical connector using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1048466A true JPH1048466A (en) | 1998-02-20 |
| JP3278577B2 JP3278577B2 (en) | 2002-04-30 |
Family
ID=16455501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20231496A Expired - Fee Related JP3278577B2 (en) | 1996-07-31 | 1996-07-31 | Adhesive for optical connector and ferrule and optical connector using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3278577B2 (en) |
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