JPS58220113A - Connecting method of optical fiber - Google Patents

Connecting method of optical fiber

Info

Publication number
JPS58220113A
JPS58220113A JP10337282A JP10337282A JPS58220113A JP S58220113 A JPS58220113 A JP S58220113A JP 10337282 A JP10337282 A JP 10337282A JP 10337282 A JP10337282 A JP 10337282A JP S58220113 A JPS58220113 A JP S58220113A
Authority
JP
Japan
Prior art keywords
optical fiber
melt
atmosphere
strength
electric discharge
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.)
Pending
Application number
JP10337282A
Other languages
Japanese (ja)
Inventor
Hiroshi Ishihara
石原　浩志
Toshiaki Kakii
俊昭 柿井
Yuichi Toda
戸田　祐一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP10337282A priority Critical patent/JPS58220113A/en
Publication of JPS58220113A publication Critical patent/JPS58220113A/en
Pending legal-status Critical Current

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
    • G02B6/2558—Reinforcement of splice joint

Abstract

PURPOSE:To prevent the deterioration in strength in a melt-stuck part and to improve strength by melt sticking and connecting an optical fiber in a low moisture atmosphere or an inert gaseous atmosphere. CONSTITUTION:Optical fiber cores 3 are melt-stuck and connected in a gaseous nitrogen atmosphere wherein the entire part in the melt-stuck part of the optical fibers is maintained in a nitrogen atmosphere of 7ppm moisture and 99.99% purity as well as in the same atmosphere in a melt sticking and connecting part 10. Helium and argon are usable as the atmosphere gas and nitrogen is more preferable in terms of the safety of electric discharge and economy. A CO2 laser is usable as well as the melting by electric discharge as a melt sticking means. While the strength of the optical fiber glass is deteriorated by nearly 90% by electric discharge in the air, the deterioration in the strength is prevented to about 10% by the above-mentioned connecting method.

Description

【発明の詳細な説明】 発明の技術分野： 本発明は光ファイバの融着接続力法、とくに高強度の融
着接続を行なう光ファイバの接続方法に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention: The present invention relates to a force method for fusion splicing optical fibers, and more particularly to a method for splicing optical fibers that performs high-strength fusion splicing.

技術の背景： 光フアイバ融着接続部分の強度は、一般に光ファイバの
他の部分に比して強度は低く、たとえば第１図に示す放
電による融着接続では放電融着部５の近傍が最も強度が
低く、破断もこの部分で約７割発生するということが知
られている。なお第１図において１は放電電極、２は放
電、３は光フアイバ心線、４は裸光ファイバである。Background of the technology: The strength of the optical fiber fusion splicing portion is generally lower than that of other parts of the optical fiber. For example, in the fusion splicing by electric discharge shown in FIG. It is known that the strength is low and that about 70% of fractures occur in this area. In FIG. 1, 1 is a discharge electrode, 2 is a discharge, 3 is an optical fiber core, and 4 is a bare optical fiber.

従来技術と問題点： 上に述べた事実に着目し、平均５　Ｋｇある光フアイバ
ガラス表面に放電だけを与えるという実験を行なった。Prior Art and Problems: Focusing on the above-mentioned facts, an experiment was conducted in which only a discharge was applied to the surface of an optical fiber glass weighing 5 kg on average.

その結果空気中では放電によシ該光ファイバガラスの強
度が９割近く劣化するのに対し、低湿度雰囲気または不
活性気体雰囲気内では１割程度に強度劣化をおさえるこ
とが可能なことを確認した。すなわち、融着時の強度劣
化は、融着時の湿度および雰囲気ガスとガラス表面との
反応とで大きく支配され、少なくとも従来のように湿度
等が管理されていない空気中での融着は強度劣化上きわ
めて好ましくないことが明らかとなった。As a result, it was confirmed that while the strength of the optical fiber glass deteriorates by nearly 90% due to discharge in air, it is possible to suppress the strength deterioration to about 10% in a low humidity atmosphere or an inert gas atmosphere. did. In other words, the strength deterioration during welding is largely controlled by the humidity at the time of welding and the reaction between the atmospheric gas and the glass surface. It has become clear that this is extremely undesirable in terms of deterioration.

このことは、従来から指摘されているようにガラス表面
のクラック成長が、融着時の水分吸着および雰囲気ガス
により影響を受けるという仁とにほかならない。This is because, as has been pointed out in the past, crack growth on the glass surface is affected by moisture adsorption during fusion and atmospheric gas.

発明の目的： 本発明の目的は上述した従来の融着による光フ゛アイバ
ガラスの強度低下の欠点を解消し、高強度の融着接続を
行なう光ファイバの接続方法を提供するにある。以下本
発明の実施例について説明する。OBJECTS OF THE INVENTION: An object of the present invention is to provide an optical fiber splicing method that eliminates the above-mentioned drawback of the reduction in strength of optical fiber glass caused by conventional fusion splicing and performs high-strength fusion splicing. Examples of the present invention will be described below.

発明の実施例： 第２図は本発明による光ファイバの融着接続方法を示す
図である。第１図と同じ部分は同じ符号で示す。６は窒
素ボンベ、７は減圧弁、８はゴムホース、９は圧力制御
弁、１０は窒素ガス雰囲気および融着接続部、１１は融
着接続装置である６融着部全体を水分＊７ｐｐｍ　の純
度９９．９９％の窒素雰囲気に保った窒素ガス雰囲気お
よび融着接続部１０内の該雰囲気下で融着接続を行なう
。この場合雰囲気ガスとしてはヘリウム、アルゴンも適
用できる。ただし放電の安定性、経済性の面からは窒素
が好ましいが本発明においては窒素に限定されるもので
ないことは勿論である。また融着手段として放電融着以
外に炭酸ガスレーザを用いても本発明の主旨をそこなう
も・のでＣ１ない。Embodiments of the Invention: FIG. 2 is a diagram showing a method for fusion splicing optical fibers according to the present invention. The same parts as in FIG. 1 are designated by the same reference numerals. 6 is a nitrogen cylinder, 7 is a pressure reducing valve, 8 is a rubber hose, 9 is a pressure control valve, 10 is a nitrogen gas atmosphere and a fusion splicing part, and 11 is a fusion splicing device. Fusion splicing is performed in a nitrogen gas atmosphere maintained at 99.99% nitrogen and in this atmosphere inside the fusion splicing section 10. In this case, helium or argon can also be used as the atmospheric gas. However, from the viewpoint of discharge stability and economic efficiency, nitrogen is preferable, but it goes without saying that the present invention is not limited to nitrogen. Further, even if a carbon dioxide gas laser is used as a welding means other than discharge welding, the gist of the present invention will be lost, so there is no C1.

発明の効果： 以上述べたように本発明により光ファイバを融着接続す
ると、融着部での強度劣化が防止でき、光フアイバ接続
部の強度向上に効果顕著である。Effects of the Invention: As described above, when optical fibers are fusion spliced according to the present invention, strength deterioration at the fused portion can be prevented, and the strength of the optical fiber spliced portion can be significantly improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の光コアイノ（放電融着接続方法の説明図
、第２図は本発明による光コアイノ（吊＋１！＠接続方
法の説明図である。 １・・・放′亀１．極、２・・・放電、６・・・光ファ
イ、＜ｌＬ％線、４・・・裸光ファイバ、５・・・融着
部、６・・・窒素ボンベ、７・・・減圧弁、８・・・ゴ
ムホース、９・・・圧力密１１徊１弁、１０・・・窒素
ガス雰囲気および融着接続部、１１　・・・融着接続装
置 特許出願人　日本軍イ＾電話公社（外１名）代理人弁理
士　玉　蟲　久　五　部Fig. 1 is an explanatory diagram of the conventional optical core ino (discharge fusion splicing method), and Fig. 2 is an explanatory diagram of the optical core ino (suspension +1! @ connection method) according to the present invention. , 2... Discharge, 6... Optical fiber, <lL% line, 4... Bare optical fiber, 5... Fusion part, 6... Nitrogen cylinder, 7... Pressure reducing valve, 8 ...Rubber hose, 9...Pressure tightness, 11 valves, 10...Nitrogen gas atmosphere and fusion splicing part, 11...Fusion splicing device patent applicant Japanese Army Telephone Public Corporation (1 other person) )Representative Patent Attorney Hisa Gobe Tamamushi

Claims (1)

【特許請求の範囲】[Claims] 低湿度雰囲気内または不活性気体雰囲気内において光フ
ァイバを融着接続することを特徴とする光ファイバの接
続方法。An optical fiber splicing method characterized by fusion splicing optical fibers in a low humidity atmosphere or an inert gas atmosphere.
JP10337282A 1982-06-16 1982-06-16 Connecting method of optical fiber Pending JPS58220113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10337282A JPS58220113A (en) 1982-06-16 1982-06-16 Connecting method of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10337282A JPS58220113A (en) 1982-06-16 1982-06-16 Connecting method of optical fiber

Publications (1)

Publication Number Publication Date
JPS58220113A true JPS58220113A (en) 1983-12-21

Family

ID=14352272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10337282A Pending JPS58220113A (en) 1982-06-16 1982-06-16 Connecting method of optical fiber

Country Status (1)

Country Link
JP (1) JPS58220113A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5086515A (en) * 1973-12-03 1975-07-11
JPS5432335A (en) * 1977-08-17 1979-03-09 Nec Corp Method and apparatus for welding of optical parts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5086515A (en) * 1973-12-03 1975-07-11
JPS5432335A (en) * 1977-08-17 1979-03-09 Nec Corp Method and apparatus for welding of optical parts

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