JPS61143704A - Fusion splicing method of single mode optical fibers - Google Patents
Fusion splicing method of single mode optical fibersInfo
- Publication number
- JPS61143704A JPS61143704A JP26590084A JP26590084A JPS61143704A JP S61143704 A JPS61143704 A JP S61143704A JP 26590084 A JP26590084 A JP 26590084A JP 26590084 A JP26590084 A JP 26590084A JP S61143704 A JPS61143704 A JP S61143704A
- Authority
- JP
- Japan
- Prior art keywords
- extent
- cores
- optical fibers
- fibers
- eccentricity
- 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
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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は単一モード光ファイバの融着接続方法に関し
、特にコアの偏心の大きい場合に有効な方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for fusion splicing single mode optical fibers, and particularly to a method that is effective when the eccentricity of the core is large.
［従来の技術］
融着接続の際の、光ファイバの移動と放電とのタイムチ
ャートを第５図に示す。なお、縦軸の光フアイバ移動の
、０の線は端面の間隔がゼロの状態、−は離れている状
態、＋は押込んだ状態を、それぞれ示す。[Prior Art] FIG. 5 shows a time chart of movement of an optical fiber and discharge during fusion splicing. In the optical fiber movement on the vertical axis, the 0 line indicates a state where the distance between the end faces is zero, - indicates a state where they are separated, and + indicates a state where they are pushed in.
光フアイバ移動の折れ線に沿って示したＡ−Ｄの各段階
について、説明する。Each stage of A-D shown along the polygonal line of optical fiber movement will be explained.
・Ａの段階：
第６１ｆ！Ｊ（ａ）のように、光ファイバ１０の端面間
が少し離れた状態で、コアの調心を行なう。- Stage A: 61st f! As shown in J(a), the core is aligned with the end faces of the optical fiber 10 being slightly separated from each other.
・Ｂの段階：
第６図（ｂ）のように、電極２０によるアーク放電を開
始し、光ファイバ１０を前進させる。- Stage B: As shown in FIG. 6(b), arc discharge by the electrode 20 is started and the optical fiber 10 is advanced.
・Ｃの段階：
第６図（Ｃ）のように、端面を接触させた後、さらに押
込む。・Step C: As shown in Figure 6 (C), after bringing the end faces into contact, press further.
ΦＤの段階： しばらく加熱を続行し、それから放電を終了する。Stage of ΦD: Continue heating for a while and then terminate the discharge.
［発明が解決しようとする問題点］
第７図（ａ）のように、コア１２が偏心していない場合
は、融着接続後も、同図（ｂ）のように、コア１２は真
直になっていて、問題はない。。[Problems to be Solved by the Invention] If the core 12 is not eccentric as shown in FIG. 7(a), the core 12 will remain straight even after fusion splicing as shown in FIG. 7(b). There is no problem. .
しかし、第８図（ａ）のように、コア１２が太きく偏心
していると、上記Ｃの段階において、両方の光ファイバ
１０の接触する部分に偶力が働き、接触部分が傾斜して
（同図（ｂ）および（Ｃ））、融着したファイバが部分
的に湾曲する。そのためにコア１２にもマイクロベンド
が生じて、損失が増大する。However, if the core 12 is thick and eccentric as shown in FIG. (b) and (c) of the same figure, the fused fibers are partially curved. Therefore, microbends also occur in the core 12, increasing loss.
この発明は、上記の問題を解決することのできる、単一
モード光ファイバの融着接続方法の提供を目的とするも
のである。The object of the present invention is to provide a method for fusion splicing single mode optical fibers that can solve the above problems.
［問題点を解決するための手段］
押込み工程の後、光ファイバを引戻し、その後、放電に
よる加熱を終了することを特徴とする。[Means for Solving the Problems] After the pushing step, the optical fiber is pulled back, and then heating by discharge is terminated.
［その説明］
光ファイバの移動と放電とのタイムチャートを示す、第
１図について説明する。[Explanation] Fig. 1, which shows a time chart of movement of the optical fiber and discharge, will be explained.
Ａ、Ｂ、Ｃの段階は、上記の第５図のＡ、Ｂ。Stages A, B, and C are A, B in Figure 5 above.
Ｃのそれぞれの場合と同じである。The same is true for each case of C.
なお、Ａの段階における端面の離隔は５〜２０ｇｍ程度
であり、Ｃの段階における押込み量も５〜２０終謬程度
である。Note that the distance between the end faces at stage A is about 5 to 20 gm, and the amount of pushing at stage C is also about 5 to 20 gm.
・Ｄの段階；
所定の量だけ押込んだ後、ｔｌの時間だけ加熱を続ける
。この１．は０．５秒程度である。- Stage D: After pushing in a predetermined amount, heating is continued for a time tl. This 1. is about 0.5 seconds.
・Ｅの段階：
それから、いったん押込んだ光ファイバを、引戻す。こ
れが本発明の最も大切なところである。・Step E: Then, the optical fiber that has been pushed in is pulled back. This is the most important point of the present invention.
引戻す量は、押込んだ量よりも少し条目にした方がよい
。It is better to pull back the amount a little more than the amount pushed in.
そうすると、第２図（ａ）のようにマイクロベンドして
いたコア１２が引き延ばされて、同図（ｂ）のように真
直になる。As a result, the core 12, which had been micro-bent as shown in FIG. 2(a), is stretched and becomes straight as shown in FIG. 2(b).
なお、コア１２（７）偏心量の少ない場合は、引戻し量
は、押込み量の半分くらいでもよい、また偏心量の非常
に大きい場合は、引戻し量を押込み量の３倍くらいまで
にすることができる。In addition, if the amount of eccentricity of the core 12 (7) is small, the amount of pullback may be about half of the amount of push-in, and if the amount of eccentricity is very large, the amount of pull-back may be up to three times the amount of push-in. can.
光ファイバ１０を引戻す速度は、押込むときの速度と同
じでよい、したがってタイムチャートにおける折れ線の
傾斜は、ＣのときもＥのときも同じになる。The speed at which the optical fiber 10 is pulled back may be the same as the speed at which it is pushed in. Therefore, the slope of the polygonal line in the time chart is the same at both times C and E.
・Ｆの段階：
所定量だけ引戻した後、ｔｌの時間だけ加熱を続け、そ
の後放電を終了する。- Stage F: After pulling back by a predetermined amount, heating is continued for the time tl, and then the discharge is terminated.
このｔｌは、０．５〜２秒くらいである。This tl is about 0.5 to 2 seconds.
なお、放電の継続時間は、従来の場合が１秒程度で、本
発明の場合は２〜３秒程度である。Note that the duration of discharge is about 1 second in the conventional case, and about 2 to 3 seconds in the case of the present invention.
［試験成ｋＲ］
第３図に、本発明の方法による接続試験結果のヒストグ
ラムを示す。平均値は０．０ｅ ｄＢ、なお試料の単一
モード光ファイバの、外径は１２５ＪＬ１１、コア径は
９ｇｍ 、コアの偏心は３％ 。[Test Formation] FIG. 3 shows a histogram of connection test results according to the method of the present invention. The average value is 0.0e dB, and the sample single mode optical fiber has an outer diameter of 125JL11, a core diameter of 9gm, and a core eccentricity of 3%.
また同じ光ファイバの、従来の方法による接続試験結果
を、第４図に示す。平均値は０．１２５ ｄＢであり、
本発明の方法の良いことがよく分る。Furthermore, the connection test results of the same optical fiber using the conventional method are shown in FIG. The average value is 0.125 dB,
The advantages of the method of the present invention are clearly seen.
［発明の効果］
押込み工程の後、光ファイバを引戻し、その後、アーク
放電による加熱を終了するので、コアの偏心量の大きい
単一モード光ファイバの場合でも、いったんマイクロベ
ンドしたコアが真直に引き延ばされる。したがって損失
が増大しない。[Effects of the Invention] After the pushing process, the optical fiber is pulled back and then heating by arc discharge is finished, so even in the case of a single mode optical fiber with a large amount of core eccentricity, the micro-bent core can be pulled straight. It will be extended. Therefore, losses do not increase.
第１図は本発明における光ファイバと放電のタイムチャ
ート。
第２図のＣａ）（ｂ）は、本発明において、いったんマ
イクロベンドしたコアが真直になる状況の説明図、
第３図は本発明による接続特性の度数分布図第４図は従
来方法による接続特性の度数分布図。
第５図以下は従来技術に関するもので、第５図は融着接
続における光ファイバと放電のタイムチャート、
第６図（ａ）〜（Ｃ）は接続時における光ファイバ１０
の状況を順に示す説明図、
第７図（ａ）（ｂ）はコア偏心の無い場合の説明図、
第８図（ａ）〜（Ｃ）はコア偏心の大きい場合の説明図
である。
ｌＯ：光ファイバ １２：コア
２０：電極FIG. 1 is a time chart of the optical fiber and discharge in the present invention. Ca) and (b) in Fig. 2 are explanatory diagrams of the situation in which the micro-bent core becomes straight in the present invention. Fig. 3 is a frequency distribution diagram of connection characteristics according to the present invention. Fig. 4 is a connection by the conventional method. Frequency distribution diagram of characteristics. Figure 5 and subsequent figures relate to the prior art. Figure 5 is a time chart of optical fibers and discharge during fusion splicing, and Figures 6 (a) to (C) are optical fibers 10 during splicing.
FIGS. 7(a) and 7(b) are explanatory diagrams showing the situation when there is no core eccentricity, and FIGS. 8(a) to (C) are explanatory diagrams when the core eccentricity is large. lO: Optical fiber 12: Core 20: Electrode
Claims (1)
に加熱しながら、光ファイバの端面を接触させ、それか
らさらに押込む工程とを含む、単一モード光ファイバの
融着接続方法において、前記押込み工程の後、光ファイ
バを引戻し、その後、前記加熱を終了することを特徴と
する、単一モード光ファイバの融着接続方法。[Claims] A step of aligning the core, and a step of bringing the end surfaces of the optical fibers into contact with each other while heating the ends of the optical fibers by arc discharge to a temperature at which they can be fused, and then pushing the ends further. A method for fusion splicing single mode optical fibers, comprising: pulling back the optical fiber after the pushing step, and then terminating the heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26590084A JPS61143704A (en) | 1984-12-17 | 1984-12-17 | Fusion splicing method of single mode optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26590084A JPS61143704A (en) | 1984-12-17 | 1984-12-17 | Fusion splicing method of single mode optical fibers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61143704A true JPS61143704A (en) | 1986-07-01 |
| JPH022128B2 JPH022128B2 (en) | 1990-01-17 |
Family
ID=17423661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26590084A Granted JPS61143704A (en) | 1984-12-17 | 1984-12-17 | Fusion splicing method of single mode optical fibers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61143704A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284604A (en) * | 1988-09-21 | 1990-03-26 | Sumitomo Electric Ind Ltd | Fusion-splicing method for optical fiber |
| WO1991003751A1 (en) * | 1989-09-11 | 1991-03-21 | British Telecommunications Public Limited Company | Optical fibre fusion splicing |
| EP1385029A1 (en) * | 2001-03-23 | 2004-01-28 | Sumitomo Electric Industries, Ltd. | Method for fusion splicing optical fibers |
| JP2008003170A (en) * | 2006-06-20 | 2008-01-10 | Fujikura Ltd | Method and apparatus for fusion splicing optical fiber |
| CN111855145A (en) * | 2020-07-30 | 2020-10-30 | 成都中住光纤有限公司 | Use method of optical fiber macrobend testing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5526505A (en) * | 1978-08-15 | 1980-02-26 | Nippon Telegr & Teleph Corp <Ntt> | Vibration type fusion connecting device of optical fiber |
| JPS61120106A (en) * | 1984-11-16 | 1986-06-07 | Nippon Telegr & Teleph Corp <Ntt> | Connecting method of single-mode optical fiber |
-
1984
- 1984-12-17 JP JP26590084A patent/JPS61143704A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5526505A (en) * | 1978-08-15 | 1980-02-26 | Nippon Telegr & Teleph Corp <Ntt> | Vibration type fusion connecting device of optical fiber |
| JPS61120106A (en) * | 1984-11-16 | 1986-06-07 | Nippon Telegr & Teleph Corp <Ntt> | Connecting method of single-mode optical fiber |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284604A (en) * | 1988-09-21 | 1990-03-26 | Sumitomo Electric Ind Ltd | Fusion-splicing method for optical fiber |
| WO1991003751A1 (en) * | 1989-09-11 | 1991-03-21 | British Telecommunications Public Limited Company | Optical fibre fusion splicing |
| EP1385029A1 (en) * | 2001-03-23 | 2004-01-28 | Sumitomo Electric Industries, Ltd. | Method for fusion splicing optical fibers |
| US6835005B2 (en) | 2001-03-23 | 2004-12-28 | Sumitomo Electric Industries, Ltd. | Method for fusion splicing optical fibers |
| JP2008003170A (en) * | 2006-06-20 | 2008-01-10 | Fujikura Ltd | Method and apparatus for fusion splicing optical fiber |
| JP4610524B2 (en) * | 2006-06-20 | 2011-01-12 | 株式会社フジクラ | Optical fiber fusion splicing method and apparatus |
| CN111855145A (en) * | 2020-07-30 | 2020-10-30 | 成都中住光纤有限公司 | Use method of optical fiber macrobend testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH022128B2 (en) | 1990-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |