JPH0463367B2 - - Google Patents
Info
- Publication number
- JPH0463367B2 JPH0463367B2 JP59006749A JP674984A JPH0463367B2 JP H0463367 B2 JPH0463367 B2 JP H0463367B2 JP 59006749 A JP59006749 A JP 59006749A JP 674984 A JP674984 A JP 674984A JP H0463367 B2 JPH0463367 B2 JP H0463367B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical fiber
- branching
- fiber fixing
- fixing jigs
- 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 - Lifetime
Links
- 239000013307 optical fiber Substances 0.000 claims description 44
- 230000003287 optical effect Effects 0.000 claims description 36
- 230000008878 coupling Effects 0.000 claims description 27
- 238000010168 coupling process Methods 0.000 claims description 27
- 238000005859 coupling reaction Methods 0.000 claims description 27
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007526 fusion splicing Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
- G02B6/2835—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals formed or shaped by thermal treatment, e.g. couplers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は光通信部門において用いられる光フア
イバの光分岐結合部の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a method for manufacturing an optical branching and coupling section of an optical fiber used in the optical communications sector.
従来、光通信部門で光を分岐する光分岐装置と
して、レンズ、ハーフミラー等の光学部品を用い
たいわゆるマイクロオプテイクス技術による装置
が採用されていた。しかしこの装置の場合光学部
品の精度および各部品間の相対的な位置精度が損
失特性に大きな影響を与えるため、高精度の部品
と位置合わせが必要とされ、その製造は難しく高
い経費がかかつた。また光が各光学部品を通過す
る際に生ずる光の反射および吸収によつて、損失
が増加するという問題もある。
Conventionally, devices based on so-called micro-optics technology using optical components such as lenses and half mirrors have been employed as optical branching devices for branching light in the optical communications sector. However, in the case of this device, the accuracy of the optical components and the relative positional accuracy of each component have a large effect on the loss characteristics, so high-precision components and alignment are required, which is difficult and expensive to manufacture. Ta. There is also the problem that losses increase due to reflection and absorption of light that occurs when light passes through each optical component.
そこでこの問題を解消するために、複数の光フ
アイバを互に平行に並べて接触させ、この接触部
を放電に曝すなどして加熱融着させ、この加熱融
着部を両側に引き伸ばして光分岐結合部を製造
し、この光分岐結合部の切断面を光分岐結合すべ
き別の光フアイバの光分岐結合部の切断面に突き
合わせて融着接続して光分岐結合を行なうことが
提案されている。この場合前述の光学部品を必要
としない点で有利であるが、種々の分岐特性を得
るための光分岐結合部の長さの制御が困難であ
り、また光フアイバ内でのコアの急激な変形によ
つて損失が増大するという問題がある。 Therefore, in order to solve this problem, multiple optical fibers are arranged in parallel and in contact with each other, and this contact part is heated and fused by exposing it to electric discharge, etc., and this heat-fused part is stretched to both sides to couple the optical fibers. It has been proposed to perform optical branching and coupling by manufacturing an optical branching and coupling part, and aligning the cut surface of this optical branching and coupling part with the cut plane of the optical branching and coupling part of another optical fiber to be optically branched and coupled, and fusion splicing. . This case is advantageous in that it does not require the above-mentioned optical components, but it is difficult to control the length of the optical branching/coupling part to obtain various branching characteristics, and the core may be rapidly deformed within the optical fiber. There is a problem that losses increase due to
本発明の目的は、光フアイバ以外の光学部品を
必要としない上述の加熱融着による光分岐結合部
の製造方法から出発して、光分岐結合部を任意の
長さに制御でき、光フアイバのコアの急激な変形
が避けられるような光分岐結合部の製造方法を提
供することにある。
An object of the present invention is to start from the above-mentioned method for manufacturing an optical branching/coupling part by heat fusion, which does not require any optical components other than optical fibers, to control the optical branching/coupling part to any length, and to make it possible to control the length of the optical branching/coupling part. It is an object of the present invention to provide a method for manufacturing an optical branching/coupling part that can avoid rapid deformation of the core.
上記の目的を達成するために、本発明によれ
ば、複数の光フアイバを互いに平行に並べて接触
させ、この接触部を加熱融着手段で融着させて光
分岐結合部を製造する方法において、加熱融着過
程中に、前記加熱融着手段の両側に位置し前記複
数の光フアイバを把持する二つの光フアイバ固定
用治具を、同方向に同じ速度で所定の時間移動さ
せた後、前記二つの光フアイバ固定用治具を、前
記複数の光フアイバに張力が加わるように、同方
向に前記速度より速く且つ相異なる速度で所定の
時間移動させ、しかる後、前記二つの光フアイバ
固定用治具を、再度、同方向に同じ速度で所定の
時間移動させることとする。
In order to achieve the above object, the present invention provides a method for manufacturing an optical branching/coupling part by arranging a plurality of optical fibers in parallel with each other and bringing them into contact with each other, and fusing the contact portions with a heat fusion means. During the heat fusing process, two optical fiber fixing jigs that are located on both sides of the heat fusing means and grip the plurality of optical fibers are moved in the same direction at the same speed for a predetermined time, and then the Two optical fiber fixing jigs are moved in the same direction at a speed higher than the above speed but at different speeds for a predetermined time so as to apply tension to the plurality of optical fibers, and then the two optical fiber fixing jigs are Let us move the jig again in the same direction at the same speed for a predetermined time.
次に図面に示す実施例に基づいて本発明を詳細
に説明する。
Next, the present invention will be described in detail based on embodiments shown in the drawings.
第１図における本発明に基づく光分岐結合部の
製造装置は、複数本この場合２本の光フアイバ１
ａ，１ｂを互に接触させて保持しモータ２ａ，２
ｂによつて光フアイバ１ａ，１ｂの長手方向に移
動できる光フアイバ固定用治具３ａ，３ｂ、光フ
アイバ１ａ，１ｂが互に接触を保つたまま移動す
るように案内する光フアイバガイド４ａ，４ｂ、
光フアイバ１ａ，１ｂの接触部を放電によつて加
熱融着する一対の放電電極５ａ，５ｂから構成さ
れている。光フアイバ固定用治具３ａ，３ｂを移
動するモータ２ａ，２ｂおよび放電電極５ａ，５
ｂの放電電源６は、制御ユニツト７および入出力
回路８によつて制御される。すなわち光フアイバ
固定用治具３ａ，３ｂの移動速度、移動距離、移
動方向、および放電開始時期、放電電流、放電時
間が、本発明に基づいて所望の光分岐結合部の長
さおよび光フアイバのコアの移行断面形状を得る
ように制御される。 The apparatus for manufacturing an optical branching/coupling unit according to the present invention shown in FIG.
a, 1b are held in contact with each other, and the motors 2a, 2
optical fiber fixing jigs 3a, 3b that can be moved in the longitudinal direction of the optical fibers 1a, 1b by means of b; optical fiber guides 4a, 4b that guide the optical fibers 1a, 1b so that they move while maintaining contact with each other; ,
It is composed of a pair of discharge electrodes 5a and 5b that heat and fuse the contact portions of optical fibers 1a and 1b by electric discharge. Motors 2a, 2b for moving optical fiber fixing jigs 3a, 3b and discharge electrodes 5a, 5
The discharge power source 6 of b is controlled by a control unit 7 and an input/output circuit 8. That is, the moving speed, moving distance, moving direction, discharge start time, discharge current, and discharge time of the optical fiber fixing jigs 3a and 3b are determined based on the present invention, based on the desired length of the optical branching and coupling portion, and the length of the optical fiber. controlled to obtain a transitional cross-sectional shape of the core.
第２図において光分岐結合部の製造過程の一例
を説明する。まず第１図に示したように光フアイ
バ１ａ，１ｂを配置し、放電電極５ａ，５ｂ間に
電圧をかけると、第２図ａに示したようにアーク
放電９が生じ、光フアイバ１ａ，１ｂの接触部が
加熱溶融する。この際光フアイバ固定用治具３
ａ，３ｂをモータ２ａ，２ｂによつて矢印で示し
たように左方向にある速度で移動させると、第２
図ｂに示したように所定の長さの加熱融着部１０
が生ずる。更に同じ放電電流で放電を継続しなが
ら、光フアイバ固定用治具３ａ，３ｂの移動速度
va，vbを高め、且つ光フアイバ１ａ，１ｂの融着
部に張力が加わるように、va＞vbとすると、第２
図ｃで示したように前記加熱融着部１０よりも細
い融着部１１が生ずる。そして光フアイバ固定用
治具３ａ，３ｂをもとの移動速度に戻すと、第２
図ｄに示したように再び太い融着部１２が形成さ
れる。その場合、光フアイバ１ａ，１ｂ−融着部
１０−融着部１１−融着部１２−光フアイバ１
ａ，１ｂの相互の間における移行部は図示したよ
うにほぼ円錐状の滑らかな移行部となるので、光
フアイバ１ａ，１ｂ内のコア（図示せず）の移行
断面形状も滑らかとなる。また細い融着部１１の
融着過程における光フアイバ固定用治具３ａ，３
ｂの移動時間を調整することによつて、光分岐結
合部の長さを任意に制御でき、従つて種々の分岐
特性の光分岐結合部を製造できる。最後に細い融
着部１１はそのほぼ中央で破線１３で示したよう
に垂直に切断されて、光分岐結合部の突合せ面が
形成される。 An example of the manufacturing process of the optical branching/coupling section will be explained with reference to FIG. First, when the optical fibers 1a and 1b are arranged as shown in FIG. 1 and a voltage is applied between the discharge electrodes 5a and 5b, an arc discharge 9 is generated as shown in FIG. 2a, and the optical fibers 1a and 1b are The contact area is heated and melted. At this time, the optical fiber fixing jig 3
When a and 3b are moved to the left at a certain speed as shown by the arrow by motors 2a and 2b, the second
As shown in FIG.
occurs. Furthermore, while continuing the discharge with the same discharge current, the moving speed of the optical fiber fixing jigs 3a and 3b is increased.
If v a > v b so that v a and v b are increased and tension is applied to the fused portion of the optical fibers 1a and 1b , then the second
As shown in FIG. c, a fused portion 11 is formed which is thinner than the heat fused portion 10. Then, when the optical fiber fixing jigs 3a and 3b are returned to their original moving speeds, the second
As shown in FIG. d, a thick fused portion 12 is formed again. In that case, optical fibers 1a, 1b - fused part 10 - fused part 11 - fused part 12 - optical fiber 1
Since the transition between the optical fibers a and 1b is a smooth, substantially conical transition as shown, the cross-sectional shape of the transition of the core (not shown) in the optical fibers 1a and 1b is also smooth. In addition, the optical fiber fixing jigs 3a, 3 during the welding process of the thin welded part 11
By adjusting the travel time of b, the length of the optical branching/coupling section can be arbitrarily controlled, and therefore, optical branching/coupling sections with various branching characteristics can be manufactured. Finally, the thin fused portion 11 is vertically cut approximately at its center as indicated by a broken line 13 to form an abutting surface of the optical branching/coupling portion.
このように、本発明によれば、従来の光フアイ
バの加熱融着部を両側に引き伸ばす方法とは異な
り、所望の光分岐特性を有しかつ所望の長さの光
分岐結合部を、容易に製造することができる。 As described above, according to the present invention, unlike the conventional method of stretching the heat-fused portion of an optical fiber to both sides, it is possible to easily create an optical branching/coupling portion having desired optical branching characteristics and a desired length. can be manufactured.
上述の実施例においては、放電電流を一定とし
て、光フアイバ固定用治具３ａ，３ｂの移動速度
の差によつて光フアイバ１ａ，１ｂに加わる張力
を調整し、光分岐結合部において滑らかな光フア
イバのコアの移行断面形状を得、また移動時間の
調整により所望の光分岐結合部の長さを得ている
が、さらに放電電流の大きさを調整して加熱温度
を変化させる制御を付加するようにしてもよい。
また、加熱融着手段としては、レーザ、ガストー
チなども使用できる。 In the embodiment described above, the tension applied to the optical fibers 1a and 1b is adjusted by the difference in the moving speed of the optical fiber fixing jigs 3a and 3b while the discharge current is kept constant, so that smooth light is produced at the optical branching and coupling part. The transition cross-sectional shape of the fiber core is obtained, and the desired length of the optical branching and coupling part is obtained by adjusting the travel time, but we also add control to change the heating temperature by adjusting the magnitude of the discharge current. You can do it like this.
Moreover, a laser, a gas torch, etc. can also be used as the heating and fusing means.
本発明によれば次のような利点が得られる。 According to the present invention, the following advantages can be obtained.
(1) 複数本の光フアイバの加熱融着部を段階的に
あるいは連続的に徐々に細くないし太くして、
光フアイバのコアの移行断面形状を滑らかにで
きるので、低損失の光分岐結合部が得られる。(1) The heat-fused portions of multiple optical fibers are gradually or continuously made thicker instead of thinner.
Since the transition cross-sectional shape of the core of the optical fiber can be made smooth, an optical branching/coupling section with low loss can be obtained.
(2) 光分岐結合部の長さを任意に制御できるの
で、各種の分岐特性の光分岐結合部が得られ
る。(2) Since the length of the optical branching/coupling section can be controlled arbitrarily, optical branching/coupling sections with various branching characteristics can be obtained.
第１図は本発明に基づく光分岐結合部の製造装
置の概略構成図、第２図は本発明に基づく光分岐
結合部の製造過程の一例の説明図である。
１ａ，１ｂ：光フアイバ、２ａ，２ｂ：モー
タ、３ａ，３ｂ：光フアイバ固定用治具、４ａ，
４ｂ：光フアイバガイド、５ａ，５ｂ：放電電
極、６：放電電源、７：制御部、８：入出力回
路、９：放電アーク、１０，１１，１２：融着
部。
FIG. 1 is a schematic configuration diagram of an apparatus for manufacturing an optical branching/coupling section according to the present invention, and FIG. 2 is an explanatory diagram of an example of the manufacturing process of an optical branching/coupling section according to the present invention. 1a, 1b: Optical fiber, 2a, 2b: Motor, 3a, 3b: Optical fiber fixing jig, 4a,
4b: optical fiber guide, 5a, 5b: discharge electrode, 6: discharge power supply, 7: control section, 8: input/output circuit, 9: discharge arc, 10, 11, 12: fused section.
Claims (1)
させ、この接触部を加熱融着手段で融着させて光
分岐結合部を製造する方法において、加熱融着過
程中に、前記加熱融着手段の両側に位置し前記複
数の光フアイバを把持する二つの光フアイバ固定
用治具を、同方向に同じ速度で所定の時間移動さ
せた後、前記二つの光フアイバ固定用治具を、前
記複数の光フアイバに張力が加わるように、同方
向に前記速度より速く且つ相異なる速度で所定の
時間移動させ、しかる後、前記二つの光フアイバ
固定用治具を、再度、同方向に同じ速度で所定の
時間移動させることを特徴とする光分岐結合部の
製造方法。1. In a method of manufacturing an optical branching and coupling part by arranging a plurality of optical fibers parallel to each other and making contact with each other, and fusing the contact portions with a heat fusing means, during the heat fusing process, both sides of the heat fusing means are After moving the two optical fiber fixing jigs located at and gripping the plurality of optical fibers in the same direction and at the same speed for a predetermined time, The two optical fiber fixing jigs are moved in the same direction at a speed higher than the above speed but at different speeds for a predetermined time so as to apply tension to the fibers, and then the two optical fiber fixing jigs are moved in the same direction again at the same speed for a predetermined time. A method for manufacturing an optical branching/coupling unit characterized by time-shifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP674984A JPS60150011A (en) | 1984-01-18 | 1984-01-18 | Manufacture of optical demultiplexing and multiplexing part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP674984A JPS60150011A (en) | 1984-01-18 | 1984-01-18 | Manufacture of optical demultiplexing and multiplexing part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60150011A JPS60150011A (en) | 1985-08-07 |
| JPH0463367B2 true JPH0463367B2 (en) | 1992-10-09 |
Family
ID=11646838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP674984A Granted JPS60150011A (en) | 1984-01-18 | 1984-01-18 | Manufacture of optical demultiplexing and multiplexing part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60150011A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61102613A (en) * | 1984-10-25 | 1986-05-21 | Nippon Telegr & Teleph Corp <Ntt> | Production of tapered optical fiber bundle |
| JPS6261013A (en) * | 1985-09-12 | 1987-03-17 | Daiichi Denshi Kogyo Kk | Optical fiber with elliptic lens and its manufacture |
| EP0234325A3 (en) * | 1986-02-24 | 1988-01-07 | Allied Corporation | Multimode optical fiber coupler and method of manufacture thereof |
| US4798438A (en) * | 1986-10-15 | 1989-01-17 | Gould Inc. | Method of making a single-mode evanescent-wave coupler having reduced wavelength dependence |
| JPS6444406A (en) * | 1987-08-12 | 1989-02-16 | Japan Aviation Electron | Apparatus for producing optical fiber coupler |
| JPH01154008A (en) * | 1987-12-10 | 1989-06-16 | Fujitsu Ltd | Production of fiber welding type optical multiplexer/ demultiplexer |
| JPH0559409U (en) * | 1992-10-26 | 1993-08-06 | 日本航空電子工業株式会社 | Optical fiber coupler manufacturing equipment |
| EP1060423B1 (en) | 1998-03-04 | 2010-06-02 | JDS Uniphase Corporation | Optical couplers for multimode fibers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315149A (en) * | 1976-07-26 | 1978-02-10 | Mitsubishi Electric Corp | Optical fiber divider |
| JPS58193515A (en) * | 1983-03-24 | 1983-11-11 | Toshiba Corp | Manufacture of optical distributor |
-
1984
- 1984-01-18 JP JP674984A patent/JPS60150011A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315149A (en) * | 1976-07-26 | 1978-02-10 | Mitsubishi Electric Corp | Optical fiber divider |
| JPS58193515A (en) * | 1983-03-24 | 1983-11-11 | Toshiba Corp | Manufacture of optical distributor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60150011A (en) | 1985-08-07 |
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