JP2685152B2 - Optical fiber fusion splicer - Google Patents
Optical fiber fusion splicerInfo
- Publication number
- JP2685152B2 JP2685152B2 JP28285788A JP28285788A JP2685152B2 JP 2685152 B2 JP2685152 B2 JP 2685152B2 JP 28285788 A JP28285788 A JP 28285788A JP 28285788 A JP28285788 A JP 28285788A JP 2685152 B2 JP2685152 B2 JP 2685152B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- discharge
- heating temperature
- discharge heating
- fusion
- 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 title claims description 35
- 230000004927 fusion Effects 0.000 title claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 32
- 238000007526 fusion splicing Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000010891 electric arc Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
- G01J5/0018—Flames, plasma or welding
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は光ファイバを融着接続する際の放電加熱温度
を検知する機能を具えた光ファイバの融着接続装置に関
するものである。Description: TECHNICAL FIELD The present invention relates to an optical fiber fusion splicing apparatus having a function of detecting a discharge heating temperature when fusion splicing optical fibers.
（従来の技術） 光ファイバの融着接続装置は、光ファイバの画像を観
察し、この画像を処理するシステムを具えており、この
画像処理システムを利用して光ファイバの端面位置決め
を行なった後、放電加熱融着を行なっている。(Prior Art) An optical fiber fusion splicing apparatus includes a system for observing an image of an optical fiber and processing the image, and after performing an end face positioning of the optical fiber by using this image processing system. , Discharge heating and fusion are performed.
この融着接続の工程の１つとして、上記のような放電
加熱の工程があるが、光ファイバはこの時約2000℃近く
にも熱せられる。この光ファイバの放電による加熱温度
を融着接続装置において、定量的に評価する手段とし
て、放電電流値を用いることが通例であった。例えば
「昭和63年電子情報通信学会春季全国大会Ｂ−631、SM
多芯一括融着における融着条件の最適化」にもあるよう
に、従来は放電加熱温度の調整を行なうとき、放電電流
値を測定し、これを目安に調整を行なっていた。As one of the steps of this fusion splicing, there is the above-described discharge heating step, but the optical fiber can be heated to about 2000 ° C. at this time. It has been customary to use the discharge current value as a means for quantitatively evaluating the heating temperature due to the discharge of the optical fiber in the fusion splicing device. For example, 1988 IEICE Spring National Convention B-631, SM
As described in "Optimization of fusion conditions in multi-core batch fusion," conventionally, when adjusting the discharge heating temperature, the discharge current value was measured and the adjustment was performed using this as a guide.
（解決しようとする課題） しかし、放電加熱を行なうための放電電極棒は、使用
回数が増加してくるにつれて放電加熱温度が上昇してく
ることが経験的にわかっている。放電加熱温度が適正温
度範囲を越えると、光ファイバの接続の際に光ファイバ
が融けすぎて、例えば第３図に示すように、光ファイバ
（１）の光が通る部分であるコア（11）が、接続点
（Ｂ）で著しく変形（Ａ）し、接続損失が高くなる。な
お、図において、（12）は光ファイバ（１）のクラッド
部分である。(Problems to be solved) However, it is empirically known that the discharge heating temperature of a discharge electrode rod for performing discharge heating rises as the number of times of use increases. When the discharge heating temperature exceeds the proper temperature range, the optical fiber is excessively melted when the optical fiber is connected, and for example, as shown in FIG. 3, the core (11) which is a portion through which the light of the optical fiber (1) passes. However, it is significantly deformed (A) at the connection point (B), resulting in a high connection loss. In the figure, (12) is the cladding portion of the optical fiber (1).
上述のように、従来の融着接続装置においては、放電
電流値を放電加熱温度の目安としてきたが、放電電極棒
が劣化してきても電流値の変化は殆んどない。しかし、
上述のように放電加熱温度は変化する。このため、放電
加熱温度に応じて放電電流値を調整する必要がある。第
４図は放電電流値と接続損失の関係図である。実際問題
として工事現場において、電流計、光源、パワーメータ
等の測定器を駆使して放電加熱温度の最適化を行なうこ
とは困難である。As described above, in the conventional fusion splicer, the discharge current value has been used as a standard for the discharge heating temperature, but even if the discharge electrode rod deteriorates, the current value hardly changes. But,
The discharge heating temperature changes as described above. Therefore, it is necessary to adjust the discharge current value according to the discharge heating temperature. FIG. 4 is a relationship diagram between the discharge current value and the connection loss. As a practical problem, it is difficult to optimize the discharge heating temperature at the construction site by making full use of measuring instruments such as an ammeter, a light source, and a power meter.
（課題を解決するための手段） 本発明は上述の問題点を解消した光ファイバの融着接
続装置を提供するもので、その特徴は、放電加熱中の光
ファイバが発する明るい部分の面積を計測し、該面積の
大きさより放電加熱温度の適正値を判断する機能を具え
ていることにある。(Means for Solving the Problems) The present invention provides an optical fiber fusion splicer that solves the above-mentioned problems, and is characterized by measuring the area of a bright portion emitted by an optical fiber during discharge heating. However, it has a function of judging an appropriate value of the discharge heating temperature from the size of the area.
第２図（イ）は光ファイバを放電加熱中に観察した画
像であり、（１）は光ファイバ、（８）はアーク放電の
光、（９）は光ファイバ（１）が明るく輝いている部分
である。同図（ロ）は上図の画像をあるしきい値を定め
て２値化処理した後の画像で、本発明の融着接続装置は
このような処理が可能な画像処理系を内蔵しており、こ
の２値化した後の画像の中で、光ファイバ（１）の明る
い部分（９′）の面積、即ち（ｌ）を求め、あらかじめ
求めておいた最適放電加熱温度に対応する（lo）と比較
して放電加熱温度の高低を判断する。FIG. 2 (a) is an image obtained by observing the optical fiber during discharge heating. (1) is the optical fiber, (8) is the light of arc discharge, and (9) is the optical fiber (1) is shining brightly. It is a part. The figure (b) is an image after the image of the above figure is binarized by setting a certain threshold value, and the fusion splicing device of the present invention has an image processing system capable of performing such processing built therein. Then, in this binarized image, the area of the bright portion (9 ') of the optical fiber (1), that is, (l) is determined, and it corresponds to the optimum discharge heating temperature determined in advance (lo ) To determine whether the discharge heating temperature is high or low.
（実施例） 第１図は本発明の融着接続装置の具体例のシステム構
成図である。(Embodiment) FIG. 1 is a system configuration diagram of a specific example of the fusion splicer of the present invention.
図面において、（２）は放電回路で、光ファイバ
（１）は相対向する放電電極棒（７）の間に発生するア
ーク放電による加熱で融かされる。（５）はこの光ファ
イバ（１）の加熱中の明るさを観察する光ファイバ観察
系で、この画像を画像処理部（４）で処理し、放電加熱
温度を光ファイバ（１）の明るい部分の面積により調
べ、放電加熱温度の強弱を判断する。この結果を、放電
電流制御部（３）にフィードバックし、放電加熱温度が
一定範囲の中に入るように放電電流を制御する。In the drawing, (2) is a discharge circuit, and the optical fiber (1) is melted by heating by arc discharge generated between discharge electrode rods (7) facing each other. (5) is an optical fiber observation system for observing the brightness of the optical fiber (1) during heating. This image is processed by the image processing section (4) and the discharge heating temperature is adjusted to the bright part of the optical fiber (1). The strength of the discharge heating temperature is judged by examining the area of This result is fed back to the discharge current control unit (3) to control the discharge current so that the discharge heating temperature falls within a certain range.
第５図はこのような本発明の融着接続装置を用いた放
電中の光ファイバの明るく輝く部分の面積と接続損失の
関係図である。適正な放電加熱温度として明るい部分の
面積Ａが AL≦Ａ≦AH の範囲に入るように放電電流値を制御した。FIG. 5 is a diagram showing the relationship between the area of the bright and shining portion of the optical fiber during discharge using the fusion splicing device of the present invention and the splice loss. The discharge current value was controlled so that the area A of the bright portion was within the range of A L ≦ A ≦ A H as an appropriate discharge heating temperature.
約500接続した後の放電電極棒を用いて、本発明の融
着接続装置で、上記制御方法を用いた場合は、第６図
（イ）のように接続損失は低い。因みにこの制御方法を
用いない場合は、同図（ロ）のように、接続損失は高く
なった。When the above-mentioned control method is used in the fusion splicing device of the present invention using the discharge electrode rod after about 500 connections, the splice loss is low as shown in Fig. 6 (a). Incidentally, when this control method is not used, the connection loss becomes high as shown in FIG.
（発明の効果） 以上説明したように、本発明の融着接続装置によれ
ば、放電電極棒の使用回数が増加して、放電加熱温度が
変化しても、適正な放電加熱温度に自動的に調整される
ので、マンホール内等の現場接続で光ファイバの融着接
続を行なう際に極めて効果的である。(Effects of the Invention) As described above, according to the fusion splicer of the present invention, even if the discharge heating temperature changes due to an increase in the number of times the discharge electrode rod is used, the discharge heating temperature is automatically adjusted to an appropriate discharge heating temperature. It is extremely effective when performing fusion splicing of optical fibers in a field connection such as in a manhole.
又気圧が変化した時に放電加熱温度も変化するが、こ
のような際にも調整を行なう必要がないので、高山等に
おいて接続する時にも気圧の低下を考慮する必要がな
い。Also, when the atmospheric pressure changes, the discharge heating temperature also changes, but since there is no need to make adjustments in such cases as well, it is not necessary to consider the decrease in atmospheric pressure when connecting in high mountains.
第１図は本発明の融着接続装置の具体例のシステム構成
図である。 第２図（イ）は放電加熱中の光ファイバの画像の説明
図、同図（ロ）は（イ）図の画像をあるしきい値を定め
て２値化した後の画像の説明図である。 第３図は光ファイバの接続点のコアの変形している状態
の説明図である。 第４図は放電電流値と接続損失の関係図、第５図は接続
時の光ファイバの明るい部分の面積と接続損失の関係図
である。 第６図（イ）は本発明の実施例の接続損失の分布図、同
図（ロ）は比較例の接続損失の分布図である。 １……光ファイバ、２……放電回路、３……放電電流制
御部、４……画像処理部、５……光ファイバ観察系、６
……電源、７……放電電極棒、９……明るい部分。FIG. 1 is a system configuration diagram of a specific example of the fusion splicer of the present invention. FIG. 2 (a) is an explanatory view of an image of the optical fiber during discharge heating, and FIG. 2 (b) is an explanatory view of the image of FIG. 2 (a) after binarization by setting a threshold value. is there. FIG. 3 is an explanatory diagram of a deformed state of the core at the connection point of the optical fiber. FIG. 4 is a relationship diagram between the discharge current value and the connection loss, and FIG. 5 is a relationship diagram between the area of the bright portion of the optical fiber at the time of connection and the connection loss. FIG. 6 (A) is a distribution diagram of connection loss of the example of the present invention, and FIG. 6 (B) is a distribution diagram of connection loss of the comparative example. 1 ... Optical fiber, 2 ... Discharge circuit, 3 ... Discharge current control unit, 4 ... Image processing unit, 5 ... Optical fiber observation system, 6
...... Power supply, 7 ... Discharge electrode rod, 9 ... Bright part.
Claims (2)
るシステムを具え、これを利用して光ファイバの端面位
置決めを行なった後、放電加熱融着を行なう光ファイバ
の融着接続装置において、放電加熱中の光ファイバが発
する明るい部分の面積を計測し、該面積の大きさより放
電加熱温度の適正値を判断する機能を具えていることを
特徴とする光ファイバの融着接続装置。1. A fusion splicing apparatus for optical fibers, comprising a system for observing an optical fiber image, processing the image, positioning the end face of the optical fiber using the system, and then performing discharge heating fusion. An optical fiber fusion splicer having a function of measuring the area of a bright portion emitted by an optical fiber during discharge heating and determining an appropriate value of the discharge heating temperature from the size of the area.
制御する制御系を具えていることを特徴とする請求項
（１）記載の光ファイバの融着接続装置。2. An optical fiber fusion splicing apparatus according to claim 1, further comprising a control system for automatically controlling a discharge heating temperature based on the measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28285788A JP2685152B2 (en) | 1988-11-09 | 1988-11-09 | Optical fiber fusion splicer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28285788A JP2685152B2 (en) | 1988-11-09 | 1988-11-09 | Optical fiber fusion splicer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02129607A JPH02129607A (en) | 1990-05-17 |
| JP2685152B2 true JP2685152B2 (en) | 1997-12-03 |
Family
ID=17657978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28285788A Expired - Lifetime JP2685152B2 (en) | 1988-11-09 | 1988-11-09 | Optical fiber fusion splicer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2685152B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006184467A (en) * | 2004-12-27 | 2006-07-13 | Sumitomo Electric Ind Ltd | Optical fiber heating intensity detecting method, and fusion splicing method and apparatus |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2745827B2 (en) * | 1991-01-22 | 1998-04-28 | 松下電器産業株式会社 | Optical output generator |
| DE19643661A1 (en) * | 1996-10-22 | 1998-04-23 | Siemens Ag | Method and device for determining splice parameters |
| SE516153C2 (en) * | 1997-02-14 | 2001-11-26 | Ericsson Telefon Ab L M | Method and apparatus for welding optical fibers together |
| SE511805C2 (en) * | 1997-02-14 | 1999-11-29 | Ericsson Telefon Ab L M | Method and apparatus for determining fusion current for welding optical fibers together, and using the method and apparatus respectively |
| DE10055760A1 (en) * | 2000-11-10 | 2002-05-23 | Scc Special Comm Cables Gmbh | Light waveguide welding, involves deriving welding parameter from measured intensity of light emission propagating in optical waveguide during welding in comparison with desired value |
| ATE509234T1 (en) * | 2007-10-02 | 2011-05-15 | Axis Ab | BRACKET FOR COMPONENTS FOR FIXING TO A PANEL |
-
1988
- 1988-11-09 JP JP28285788A patent/JP2685152B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006184467A (en) * | 2004-12-27 | 2006-07-13 | Sumitomo Electric Ind Ltd | Optical fiber heating intensity detecting method, and fusion splicing method and apparatus |
| US7900480B2 (en) | 2004-12-27 | 2011-03-08 | Sumitomo Electric Industries, Ltd. | Method of determining heating amount, method of fusion splicing, and fusion splicer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02129607A (en) | 1990-05-17 |
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