JPH0442802Y2 - - Google Patents
Info
- Publication number
- JPH0442802Y2 JPH0442802Y2 JP1986005827U JP582786U JPH0442802Y2 JP H0442802 Y2 JPH0442802 Y2 JP H0442802Y2 JP 1986005827 U JP1986005827 U JP 1986005827U JP 582786 U JP582786 U JP 582786U JP H0442802 Y2 JPH0442802 Y2 JP H0442802Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- housing
- output optical
- input optical
- protrusion
- 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.)
- Expired
Links
- 239000013307 optical fiber Substances 0.000 claims description 71
- 230000002265 prevention Effects 0.000 claims description 15
- 230000008602 contraction Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、１本又は複数本の入射光フアイバと
複数本の出射光フアイバとを同軸的に光結合する
光フアイバ分配器に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an optical fiber distributor that optically couples one or more input optical fibers and multiple output optical fibers coaxially.
従来の技術
従来、１本又は複数本の入射光フアイバと複数
本の出射光フアイバとを軸的に光結合するために
光フアイバ分配器が利用されている。該光フアイ
バ分配器１は、第１図に図示されるように、１本
又は複数本の入射光フアイバと複数本の出射光フ
アイバとを固定して保持するために該入射光フア
イバと出射光フアイバの接続端を収容するハウジ
ング２を有する。ハウジング２はその両端に支持
ブロツク３，４を有し、該両支持ブロツク３，４
は連結スリーブ５にて一体的に固定される。一端
に配置された支持ブロツク３には、被覆層を有す
る複数の光フアイバ心線６、及び該光フアイバ心
線６の一端から伸長するコア及びクラツドより成
る光フアイバ素線束７を融着しテーパ状に線引し
て形成されるテーパ状融着部８がつき出し防止モ
ールド部９にて固定し保持される。通常該つき出
し防止モールド部９はエポキシ樹脂が使用され
る。又他端に配置された支持ブロツク４には複数
の光フアイバ心線１０、及びその一端から伸長す
る光フアイバ素線束１１を融着しテーパ状に線引
して形成されるテーパ状融着部１２がエポキシ樹
脂等とされるつき出し防止モールド部１３にて固
定保持され、前記テーパ状融着部８，１２の先端
部は、必要に応じミキシングロツド１４を介して
同軸的に連結される。BACKGROUND OF THE INVENTION Conventionally, optical fiber distributors have been used to axially optically couple one or more input optical fibers and multiple output optical fibers. The optical fiber distributor 1, as shown in FIG. It has a housing 2 for accommodating the connecting end of the fiber. The housing 2 has support blocks 3, 4 at both ends thereof.
are integrally fixed by a connecting sleeve 5. An optical fiber bundle 7 consisting of a plurality of optical fiber cores 6 having a coating layer and a core and a cladding extending from one end of the optical fiber cores 6 is fused to the support block 3 disposed at one end and tapered. A tapered fused portion 8 formed by drawing a line is fixed and held by an extrusion prevention mold portion 9. Usually, the extrusion prevention mold part 9 is made of epoxy resin. The support block 4 disposed at the other end has a tapered fused portion formed by welding a plurality of optical fiber cores 10 and a bundle of optical fibers 11 extending from one end thereof and drawing them into a tapered shape. 12 is fixed and held by an extrusion prevention mold part 13 made of epoxy resin or the like, and the tips of the tapered fused parts 8 and 12 are coaxially connected via a mixing rod 14 as necessary. .
本考案が解決しようとする問題点
上記のような従来の光フアイバ分配器による
と、ハウジング２、つまり支持ブロツク３，４及
び連結スリーブ５、更につき出し防止モールド部
９，１３が雰囲気温度の変化にて膨張、収縮し、
光フアイバの接続部分に応力が加わり、曲がりが
生じ、伝送損失が増大するという問題があつた。Problems to be Solved by the Present Invention According to the conventional optical fiber distributor as described above, the housing 2, that is, the support blocks 3 and 4, the connecting sleeve 5, and the protrusion prevention molded parts 9 and 13 are susceptible to changes in ambient temperature. Expands and contracts at
There was a problem in that stress was applied to the connecting portion of the optical fiber, causing bending and increasing transmission loss.
このような弊害を解決するべく、ハウジング２
の材質を光フアイバと同程度の線膨張係数を有し
た材料、例えば石英ガラスやセラミツクス等で形
成した光フアイバ分配器が提案されたが、光フア
イバの接続部分に未だに曲がりが生じ問題があつ
た。 In order to solve these problems, Housing 2
An optical fiber distributor made of a material with a coefficient of linear expansion similar to that of optical fiber, such as quartz glass or ceramics, has been proposed, but the connection portion of the optical fiber still bends, causing problems. .
本考案者等は、斯る従来の光フアイバ分配器の
問題点を追求した結果、光フアイバの接続部分の
曲がりは、従来無視しても良いと考えられていた
入射光フアイバと出射光フアイバの接続端をハウ
ジング２に固定しているつき出し防止部９，１３
の熱伸縮が想像以上に大きく影響していることを
見出した。 As a result of pursuing the problems of the conventional optical fiber splitter, the inventors of the present invention discovered that the bending of the connecting portion of the optical fiber, which was previously thought to be negligible, was caused by the bending of the input optical fiber and the output optical fiber. Extrusion prevention parts 9 and 13 fixing the connection end to the housing 2
It was discovered that the thermal expansion and contraction of the material had a greater influence than expected.
本考案は斯る新規な知見に基づくものである。 The present invention is based on this new knowledge.
考案の目的
本考案の目的は、使用雰囲気温度により光フア
イバの接続部分に曲がりを生ぜしめることのな
い、従つて伝送損失増加のない光フアイバ分配器
を提供することである。Purpose of the invention The purpose of the present invention is to provide an optical fiber distributor that does not cause bending of the connecting portions of optical fibers due to the ambient temperature in which it is used, and therefore does not cause an increase in transmission loss.
問題点を解決するための手段
上記目的は本考案に係る光フアイバ分配器にて
達成される。要約すれば本考案は、１本又は複数
本の入射光フアイバと複数本の出射光フアイバと
をハウジング内に配置し、該入射光フアイバ及び
出射光フアイバはそれぞれつき出し防止モールド
部にて前記ハウジングに固定保持し、そして該入
射光フアイバと出射光フアイバとを同軸的に光結
合した光フアイバ分配器において、前記つき出し
モールド部の熱伸縮による前記ハウジング内への
つき出し量が、前記ハウジングの熱伸縮量により
相殺されるように構成したことを特徴とする光フ
アイバ分配器である。更に本考案によると、ハウ
ジングは、入射光フアイバ及び出射光フアイバを
つき出し防止モールド部を介して固定保持するべ
く同軸にて対向配置された支持ブロツクと、該両
支持ブロツクを連結する連結スリーブとから成
り、連結スリーブは線膨張係数の極めて小さな材
料にて作製され、支持ブロツクは該連結スリーブ
よりやや大きな線膨張係数を有した材料にて作製
される。Means for Solving the Problems The above objects are achieved by the optical fiber distributor according to the present invention. In summary, the present invention arranges one or more input optical fibers and a plurality of output optical fibers in a housing, and the input optical fibers and the output optical fibers are respectively attached to the housing by protrusion prevention mold parts. In an optical fiber distributor in which the input optical fiber and the output optical fiber are coaxially optically coupled, the amount of protrusion of the protruding molded portion into the housing due to thermal expansion and contraction is determined by the amount of protrusion of the protruding molded portion into the housing. This is an optical fiber distributor characterized in that it is configured to be offset by the amount of thermal expansion and contraction. Further, according to the present invention, the housing includes support blocks arranged coaxially and facing each other to fixedly hold the input optical fiber and the output optical fiber via the protrusion prevention mold part, and a connecting sleeve that connects the support blocks. The connecting sleeve is made of a material with an extremely small linear expansion coefficient, and the support block is made of a material with a slightly larger linear expansion coefficient than the connecting sleeve.
実施例
次に、本考案に係る光フアイバ分配器の一実施
例を図面に即して説明する。Embodiment Next, an embodiment of the optical fiber distributor according to the present invention will be described with reference to the drawings.
本考案に係る光フアイバ分配器は、全体構成は
第１図に図示されると同様に、ハウジング２を有
し、該ハウジングは両端に支持ブロツク３，４を
有し、該両支持ブロツク３，４は連結スリーブ５
にて一体的に固定され、各支持ブロツクに入出力
用の光フアイバが固定される構成とすることがで
きる。 The optical fiber distributor according to the present invention has a housing 2 having a general structure similar to that shown in FIG. 1, and the housing has support blocks 3 and 4 at both ends. 4 is the connecting sleeve 5
It is possible to have a structure in which the optical fibers for input and output are fixed to each support block.
本考案に従うと、連結スリーブ５は線膨張係数
の極めて小さな材料にて作製され、支持ブロツク
３，４は該連結スリーブ５よりやや大きな線膨張
係数を有した材料にて作製されるが、好ましい実
施例によると、連結スリーブ５は超アンバー（線
膨張係数α＝0.1×10-6）にて作製され、支持ブ
ロツク３，４はステンレススチール（線膨張係数
α＝17.5×10-6）にて作製され、又つき出し防止
モールド部９，１３はエポキシ樹脂とされる。 According to the present invention, the connecting sleeve 5 is made of a material with an extremely small coefficient of linear expansion, and the support blocks 3 and 4 are made of a material with a slightly larger coefficient of linear expansion than the connecting sleeve 5. According to the example, the connecting sleeve 5 is made of super umber (linear expansion coefficient α=0.1×10 -6 ), and the support blocks 3 and 4 are made of stainless steel (linear expansion coefficient α=17.5×10 -6 ). Also, the protrusion prevention mold parts 9 and 13 are made of epoxy resin.
上記構成にて、光フアイバ分配器が高温下に置
かれた場合には、つき出し防止モールド部９，１
３のハウジング内部端面９ａ，１３ａは、第１図
に想像線にて示されるように、内方へとつき出る
傾向を有し、従つて光フアイバ素線を内方へと移
動せしめることとなる。しかしながら、本考案に
よると、ハウジング２、即ち支持ブロツク３，４
は矢印Ａ，Ｂで示されるように外方へと伸びる。
尚、本実施例では、連結スリーブ５の伸縮は、通
常の光フアイバ分配器の使用環境条件下にては零
と考えることができる。 In the above configuration, when the optical fiber distributor is placed under high temperature, the protrusion prevention mold parts 9, 1
The inner end surfaces 9a and 13a of the housing 3 have a tendency to protrude inward, as shown by phantom lines in FIG. 1, and thus cause the optical fiber to move inward. . However, according to the invention, the housing 2, i.e. the support blocks 3, 4
extends outward as shown by arrows A and B.
In this embodiment, the expansion and contraction of the connecting sleeve 5 can be considered to be zero under normal environmental conditions in which an optical fiber distributor is used.
従つて、つき出し防止モールド部９，１３のハ
ウジング内方へのつき出し量は、支持ブロツク
９，１３の外方への伸び量により相殺され、各光
フアイバには何等の伸縮も生じない。又、光フア
イバ分配器が低温環境下に置かれた場合には上述
と逆の伸縮を起すが、同様に光フアイバには何等
の伸縮を生ぜず、結果的には光フアイバの接続部
分が曲がることはない。 Therefore, the amount by which the anti-protrusion mold parts 9, 13 protrude inward from the housing is offset by the amount by which the support blocks 9, 13 extend outward, and each optical fiber does not undergo any expansion or contraction. Furthermore, when an optical fiber distributor is placed in a low-temperature environment, the opposite expansion and contraction to that described above occurs, but similarly, the optical fiber does not undergo any expansion or contraction, and as a result, the connecting portion of the optical fiber bends. Never.
上記説明にて理解されるように、本考案に係る
光フアイバ分配器においては、つき出しモールド
部９，１３の熱伸縮による前記ハウジング内への
つき出し量が、前記ハウジング２の熱伸縮量によ
り相殺されるように構成されることが重要であ
り、各部分の寸法形状は斯る事実を満足せしめる
ように、接続される入射光フアイバ及び出射光フ
アイバの構成、並びにハウジング及びつき出し防
止モールド部の構造にて種々に選定されるであろ
う。一例を挙げれば、入射光フアイバ及び出射光
フアイバがそれぞれ33本から成るスターカプラ構
成における光フアイバ分配器において、
・ 支持ブロツク
材質：ステンレススチール
内径： ９mm
外径： 18mm
長さ： 75mm
・ 連結スリーブ
材質：超アンバー
内径： 19mm
外径： 24mm
長さ： 105mm
・ つき出し防止モールド
材質：エポキシ樹脂
長さ： 20mm
にて、温度−40℃〜90℃の範囲にて光フアイバの
接続部分の曲がりはなく、伝送損失は変動せず、
良好な結果を得ることができた。 As understood from the above description, in the optical fiber distributor according to the present invention, the amount of protrusion of the protruding mold parts 9 and 13 into the housing due to thermal expansion and contraction depends on the amount of thermal expansion and contraction of the housing 2. It is important that the structures are balanced, and the dimensions and shapes of each part are designed to satisfy this fact, including the configuration of the input optical fiber and output optical fiber to be connected, as well as the housing and the protrusion prevention mold part. The structure may be selected in various ways. For example, in an optical fiber distributor in a star coupler configuration consisting of 33 input optical fibers and 33 output optical fibers, - Support block material: stainless steel Inner diameter: 9 mm Outer diameter: 18 mm Length: 75 mm - Connection sleeve material : Super amber Inner diameter: 19mm Outer diameter: 24mm Length: 105mm ・Extrusion prevention mold material: Epoxy resin Length: 20mm, the optical fiber connection part does not bend in the temperature range of -40℃ to 90℃ , the transmission loss does not change,
Good results were obtained.
尚、入射光フアイバと出射光フアイバとは直接
接続することができるが、ミキシングロツド１４
を介して接続した場合にはより均等に光を分配し
得るという利益がある。 Incidentally, the input optical fiber and the output optical fiber can be directly connected, but the mixing rod 14
This has the advantage of more evenly distributing the light.
考案の効果
上記の如くに構成される本考案に係る光フアイ
バ分配器は、温度変化の影響を受けず、良好な、
つまり、低損失にて光分配を達成し得るという特
長を有する。Effects of the invention The optical fiber distributor according to the invention configured as described above is not affected by temperature changes and has good performance.
In other words, it has the advantage of being able to achieve optical distribution with low loss.
第１図は、本考案に係る光フアイバ分配器の一
実施例の断面図である。
２……ハウジング、３，４……支持ブロツク、
５……連結スリーブ、６，１０……光フアイバ心
線、７，１１……光フアイバ素線、９，１３……
つき出し防止モールド部、１４……ミキシングロ
ツド。
FIG. 1 is a sectional view of an embodiment of an optical fiber distributor according to the present invention. 2...Housing, 3, 4...Support block,
5... Connection sleeve, 6, 10... Optical fiber core wire, 7, 11... Optical fiber bare wire, 9, 13...
Extrusion prevention mold part, 14...mixing rod.
Claims (1)
出射光フアイバとをハウジング内に配置し、該
入射光フアイバ及び出射光フアイバは各々つき
出し防止モールド部にて前記ハウジングに固定
保持し、そして該入射光フアイバと出射光フア
イバとを同軸的に光結合した光フアイバ分配器
において、前記ハウジングは、入射光フアイバ
及び出射光フアイバを前記つき出し防止モール
ド部を介して固定保持するべく同軸にて対向配
置された支持ブロツクと、該両支持ブロツクを
連結する連結スリーブとから成り、前記連結ス
リーブは線膨張係数の極めて小さな材料にて作
製し、前記支持ブロツクは該連結スリーブより
やや大きな線膨張係数を有した材料にて作製
し、それによつて、前記つき出しモールド部の
熱伸縮による前記ハウジング内へのつき出し量
が、前記ハウジングの熱伸縮量により相殺され
るように構成したことを特徴とする光フアイバ
分配器。 ２ 入射光フアイバと出射光フアイバとはミキシ
ングロツドを介して同軸的に光結合されて成る
実用新案登録請求の範囲第１項記載の光フアイ
バ分配器。 ３ 連結スリーブは超アンバーにて作製され、支
持ブロツクはステンレススチールにて作製さ
れ、又つき出し防止モールド部はエポキシ樹脂
とされて成る実用新案登録請求の範囲第２項記
載の光フアイバ分配器。[Claims for Utility Model Registration] 1. One or more input optical fibers and a plurality of output optical fibers are arranged in a housing, and the input optical fiber and the output optical fiber are each provided with a protrusion prevention mold part. In the optical fiber distributor fixedly held in the housing and coaxially optically coupling the input optical fiber and the output optical fiber, the housing connects the input optical fiber and the output optical fiber through the extrusion prevention mold part. It consists of support blocks arranged coaxially and facing each other to fix and hold them together, and a connection sleeve that connects the two support blocks.The connection sleeve is made of a material with an extremely small coefficient of linear expansion, and the support block It is made of a material having a coefficient of linear expansion slightly larger than that of the connecting sleeve, so that the amount of protrusion of the protruding molded portion into the housing due to thermal expansion and contraction is offset by the amount of thermal expansion and contraction of the housing. An optical fiber distributor characterized in that it is configured as follows. 2. The optical fiber distributor according to claim 1, wherein the input optical fiber and the output optical fiber are coaxially optically coupled via a mixing rod. 3. The optical fiber distributor according to claim 2, wherein the connecting sleeve is made of super umber, the support block is made of stainless steel, and the protrusion prevention mold part is made of epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986005827U JPH0442802Y2 (en) | 1986-01-21 | 1986-01-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986005827U JPH0442802Y2 (en) | 1986-01-21 | 1986-01-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62118204U JPS62118204U (en) | 1987-07-27 |
| JPH0442802Y2 true JPH0442802Y2 (en) | 1992-10-09 |
Family
ID=30787771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986005827U Expired JPH0442802Y2 (en) | 1986-01-21 | 1986-01-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442802Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6299705A (en) * | 1985-10-28 | 1987-05-09 | Hitachi Ltd | Optical fiber type distributing circuit and its manufacture |
-
1986
- 1986-01-21 JP JP1986005827U patent/JPH0442802Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6299705A (en) * | 1985-10-28 | 1987-05-09 | Hitachi Ltd | Optical fiber type distributing circuit and its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62118204U (en) | 1987-07-27 |
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