JPH0574044B2 - - Google Patents
Info
- Publication number
- JPH0574044B2 JPH0574044B2 JP59061548A JP6154884A JPH0574044B2 JP H0574044 B2 JPH0574044 B2 JP H0574044B2 JP 59061548 A JP59061548 A JP 59061548A JP 6154884 A JP6154884 A JP 6154884A JP H0574044 B2 JPH0574044 B2 JP H0574044B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- coating
- coated optical
- coated
- optical fibers
- 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 60
- 238000000576 coating method Methods 0.000 claims description 29
- 239000011248 coating agent Substances 0.000 claims description 27
- 239000002966 varnish Substances 0.000 claims description 10
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 2
- 230000004927 fusion Effects 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000007526 fusion splicing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004093 laser heating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004804 winding 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
- G02B6/255—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
- 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
- G02B6/245—Removing protective coverings of light guides before coupling
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
【発明の詳細な説明】 本発明は被覆光フアイバの接続部に関する。[Detailed description of the invention] The present invention relates to coated optical fiber connections.
通常、光フアイバは製造設備や巻取ドラムの制
限でその条長が決まつている。その為所定長の長
さを必要とする場合、複数本の光フアイバを接続
している。この接続手段としては例えば光フアイ
バ同志を融着接続する方法が採用されている。 Normally, the length of optical fiber is determined by limitations of manufacturing equipment and winding drums. Therefore, when a predetermined length is required, multiple optical fibers are connected. As this connection means, for example, a method of fusion splicing optical fibers is adopted.
この方法はその接続部での接続損失が小さくで
きる点で有効となつているが、該接続部に引張力
をかけた際の平均強度が約40Kg／mm2ときわめて小
さい故、強度上の問題究明とその解決法とが希求
されている。 This method is effective in that the connection loss at the connection can be reduced, but the average strength when tensile force is applied to the connection is extremely small, approximately 40 kg/mm 2 , so there are problems with strength. An investigation and a solution are needed.
一般にこの種の融着接続では接続すべき一対の
被覆光フアイバの端部から被覆を被覆除去工具で
もつて除去して光フアイバを露出状態とする。次
にこの光フアイバの露出部分をアセトン等の有機
溶剤を脱脂綿に湿らせて前記被覆除去工具でもつ
て除去できなかつた被覆の残りを完全に拭きと
る。つぎに、これら光フアイバの先端側をほぼ垂
直に切断して適正な突き合わせ端面をつくり、そ
の後、両突き合わせ端面を互いに突き合わせると
共に一対の放電電極によるアーク放電あるいはレ
ーザ加熱等により当該両光フアイバを融着接続し
ているが、こうした場合の接続時、被覆の除去さ
れた上記光フアイバはその取り扱い中に表面に微
細な傷が発生しやすい。このような微細な傷は接
続部の強化を劣化させる要因の一つとなつてい
る。 Generally, in this type of fusion splicing, the coating is removed from the ends of a pair of coated optical fibers to be spliced using a coating removal tool to expose the optical fibers. Next, the exposed portion of the optical fiber is completely wiped off by moistening absorbent cotton with an organic solvent such as acetone to completely wipe away any remaining coating that could not be removed with the coating removal tool. Next, the tips of these optical fibers are cut almost perpendicularly to create appropriate abutted end faces, and then both abutted end faces are abutted against each other and both optical fibers are heated by arc discharge or laser heating using a pair of discharge electrodes. Although fusion splicing is used, when splicing in such a case, the optical fiber from which the coating has been removed is likely to have minute scratches on its surface during handling. Such minute scratches are one of the factors that deteriorate the reinforcement of the connection portion.
本発明の目的は、上記の問題点に対処し、融着
接続部での強化劣化要因を効果的に除去できる被
覆光フアイバの接続部を提供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a splicing section for coated optical fibers that can address the above-mentioned problems and effectively eliminate the factors of reinforcement deterioration in the fusion spliced section.
この目的を達成するために本発明は被覆光フア
イバ端末の被覆を除去して裸光フアイバを露出せ
しめ、該裸光フアイバの外周にウレタン系絶縁ワ
ニス、エポキシ系樹脂、紫外線硬化樹脂、シラン
カツプリング剤の内いずれか一つからなる硬質の
皮膜を施してなる被覆光フアイバ端末部同志を加
熱して融着接続したことを特徴とする。 In order to achieve this object, the present invention removes the coating of the coated optical fiber terminal to expose the bare optical fiber, and coats the outer periphery of the bare optical fiber with urethane-based insulating varnish, epoxy resin, ultraviolet curing resin, or silane coupling. The present invention is characterized in that the end portions of coated optical fibers each coated with a hard coating made of one of the above agents are fused and spliced together by heating.
以下、本発明の被覆光フアイバの接続部の一実
施例について図面を参照して詳細に説明する。図
において、１は被覆光フアイバ、２は被覆、３は
裸光フアイバである。被覆２は例えば内側がシリ
コーン樹脂からなるバツフア層２Ａ、外側がナイ
ロン樹脂からなる外層２Ｂとから構成されてい
る。被覆光フアイバ１は端末の被覆２が除去され
裸光フアイバ３が露出している。この露出してい
る裸光フアイバ３の外周にはウレタン系絶縁ワニ
スよりなる硬質の皮膜４が施されている。 DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the coated optical fiber connection portion of the present invention will be described in detail below with reference to the drawings. In the figure, 1 is a coated optical fiber, 2 is a coated optical fiber, and 3 is a bare optical fiber. The coating 2 includes, for example, a buffer layer 2A made of silicone resin on the inside and an outer layer 2B made of nylon resin on the outside. The coating 2 at the end of the coated optical fiber 1 is removed to expose the bare optical fiber 3. A hard coating 4 made of urethane-based insulating varnish is applied to the outer periphery of the exposed bare optical fiber 3.
このような被覆光フアイバの端末部は例えば以
下のような手順により形成される。 The terminal portion of such a coated optical fiber is formed, for example, by the following procedure.
先ず、被覆光フアイバ１の端部から被覆２を図
示していない被覆除去工具でもつて除去して裸光
フアイバ３を露出状態とする。次にこの露出され
た裸光フアイバ３の部分をアセトン等の有機溶剤
で湿らせた脱脂綿で拭き、前記被覆除去工具でも
つて除去しきれなかつた被覆材の残りを拭きと
る。その後、露出された裸光フアイバ３の部分を
グリコールエーテル等の溶剤に溶解されたウレタ
ン絶縁ワニスの溶液に浸した後、引き上げて乾燥
させ裸光フアイバ３の外周に硬質のワニスの皮膜
４を形成する。皮膜の厚さとしては特に限定され
るものではないが、数μｍ〜数10μｍの範囲の任
意の厚さのものがワニスの溶液の濃度や浸す回数
を変えることによつて自由に得ることができる。 First, the coating 2 is removed from the end of the coated optical fiber 1 using a coating removal tool (not shown) to expose the bare optical fiber 3. Next, the exposed portion of the bare optical fiber 3 is wiped with absorbent cotton moistened with an organic solvent such as acetone to wipe off the remaining coating material that was not completely removed by the coating removal tool. After that, the exposed part of the bare optical fiber 3 is immersed in a solution of urethane insulating varnish dissolved in a solvent such as glycol ether, and then pulled up and dried to form a hard varnish film 4 on the outer periphery of the bare optical fiber 3. do. The thickness of the film is not particularly limited, but any thickness in the range of several micrometers to several tens of micrometers can be freely obtained by changing the concentration of the varnish solution and the number of times of dipping. .
なお上記例において、裸光フアイバの皮膜はウ
レタン系絶縁ワニスで構成されているが、皮膜は
ウレタン系絶縁ワニスに限るものではなくエポキ
シ系樹脂、紫外線硬化系樹脂あるいはシランカツ
プリング剤であつても良い。 In the above example, the coating on the bare optical fiber is made of urethane-based insulating varnish, but the coating is not limited to urethane-based insulating varnish, and may be made of epoxy resin, ultraviolet curing resin, or silane coupling agent. good.
以上のようにして硬質の皮膜４の形成された裸
光フアイバ３，３を有する一対の被覆光フアイバ
１，１を第２図に示すように、それぞれ裸光フア
イバ３，３の先端側をほぼ垂直に切断して適正な
突き合わせ端面５，５をつくり、その後第３図の
ごとく両突き合わせ端面５，５を互いに突き合わ
せると共に一対の放電電極６，６によるアーク放
電により当該両裸光フアイバ３，３を融着接続す
る。 As shown in FIG. 2, a pair of coated optical fibers 1, 1 having bare optical fibers 3, 3 on which hard coatings 4 have been formed as described above are shown in FIG. Proper abutted end faces 5, 5 are made by cutting vertically, and then both the abutted end faces 5, 5 are abutted against each other as shown in FIG. 3, and both bare optical fibers 3, Fusion splice 3.
以上、説明したように被覆光フアイバの端末部
は被覆の除去された裸光フアイバの表面に硬質の
皮膜が施されているので、表面に傷を発生させる
ことがない。 As described above, since the end portion of the coated optical fiber is coated with a hard coating on the surface of the bare optical fiber from which the coating has been removed, no scratches will occur on the surface.
従つて、このような裸光フアイバの端末部同志
をアーク放電あるいはレーザ加熱により融着接続
を行つた場合には、表面に傷のない状態で裸光フ
アイバ同志の接続を行うことができるので、接続
部での強度の低下を防ぐことができる。 Therefore, when the ends of such bare optical fibers are fusion spliced by arc discharge or laser heating, the bare optical fibers can be connected without any scratches on their surfaces. It is possible to prevent a decrease in strength at the connection part.
つぎに、本発明による被覆光フアイバの接続部
と従来の接続部との比較例について説明する。 Next, a comparative example of the coated optical fiber connection portion according to the present invention and a conventional connection portion will be described.
なお、これらの例では被覆前にある石英系GI
型光フアイバの外径が125μｍ（コア径50μｍ）、
シリコーン樹脂による被覆後の外径が900μｍで
ある被覆光フアイバ１，１において、これらの端
部から被覆２，２を既知の被覆除去器により除去
し、裸にされた光フアイバ３，３の外周をアセト
ン含浸の払拭部材（脱脂綿）で清拭し、その後、
ウレタン絶縁ワニスの溶液に浸した後、引き上げ
て乾燥させ1.2μｍ厚の硬質のワニスの皮膜を形成
する。このようにして作られた被覆光フアイバの
端末部の裸光フアイバの長さを約30mmとなるよう
に光フアイバ切断器により垂直に切断してアーク
放電による融着接続機にセツトして融着接続し
た。 In addition, in these examples, the quartz-based GI before coating
The outer diameter of the type optical fiber is 125μm (core diameter 50μm),
The coated optical fibers 1 and 1 have an outer diameter of 900 μm after coating with silicone resin, and the coatings 2 and 2 are removed from these ends using a known coating remover, and the outer periphery of the optical fibers 3 and 3 is exposed. Wipe with an acetone-impregnated wiping material (absorbent cotton), and then
After immersing it in a urethane insulating varnish solution, it is pulled up and dried to form a hard varnish film with a thickness of 1.2 μm. The bare optical fiber at the end of the coated optical fiber thus produced was cut vertically using an optical fiber cutter to a length of about 30 mm, and then set in a fusion splicer using arc discharge and fused. Connected.
この方法により融着接続した光フアイバ20本の
接続部の引張強度の平均は80Kg／mm2となつた。 The average tensile strength of the joints of 20 optical fibers fusion-spliced using this method was 80 kg/mm 2 .
これに対して、従来どおり裸光フアイバの表面
に硬質の皮膜を施さずに融着接続した光フアイバ
20本の接続部の引張強度の平均は42Kg／mm2であつ
た。 In contrast, optical fibers that are conventionally fused and spliced without applying a hard coating to the surface of bare optical fibers
The average tensile strength of the 20 connections was 42 Kg/mm 2 .
以上により本発明の被覆光フアイバの接続部
は、従来の接続部に対して大幅に強度が向上し
た。 As a result of the above, the strength of the coated optical fiber connection portion of the present invention is significantly improved compared to the conventional connection portion.
以上説明したとおり、本発明の被覆光フアイバ
の接続部は被覆の除去された裸光フアイバの表面
に硬質の皮膜を形成したので、これらの裸光フア
イバ同志を融着接続した場合に光フアイバ表面に
傷を発生させることがなくなり接続部での機械的
強度が格段に向上する。 As explained above, in the connecting portion of the coated optical fiber of the present invention, a hard film is formed on the surface of the bare optical fiber from which the coating has been removed, so that when these bare optical fibers are fusion spliced, the optical fiber surface This eliminates the possibility of scratches and significantly improves the mechanical strength of the connection.
第１図は被覆光フアイバの端末部の縦断面図、
第２図は同端末部の端面加工状態を示す説明図、
第３図は本発明の被覆光フアイバの接続部の融着
接続状態を示す説明図である。
１……被覆光フアイバ、２……被覆、３……裸
光フアイバ、４……皮膜、５……端面、６……放
電電極。
FIG. 1 is a longitudinal cross-sectional view of the terminal part of the coated optical fiber;
Fig. 2 is an explanatory diagram showing the end face processing state of the terminal part;
FIG. 3 is an explanatory diagram showing a state of fusion splicing of the connection portion of the coated optical fiber of the present invention. DESCRIPTION OF SYMBOLS 1...Coated optical fiber, 2...Coating, 3...Bare optical fiber, 4...Coating, 5...End face, 6...Discharge electrode.
Claims (1)
アイバを露出せしめ、該裸光フアイバの外周にウ
レタン系絶縁ワニス、エポキシ系樹脂、紫外線硬
化樹脂、シランカツプリング剤の内いずれか一つ
からなる硬質の皮膜を施してなる被覆光フアイバ
端末部同志を加熱して融着接続したことを特徴と
する被覆光フアイバの接続部。1. Remove the coating of the coated optical fiber terminal to expose the bare optical fiber, and coat the outer periphery of the bare optical fiber with any one of urethane-based insulating varnish, epoxy resin, ultraviolet curing resin, and silane coupling agent. A splicing portion of a coated optical fiber, characterized in that the coated optical fiber end portions each having a hard coating are heated and fused and spliced to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59061548A JPS60205407A (en) | 1984-03-29 | 1984-03-29 | Terminal part of coated optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59061548A JPS60205407A (en) | 1984-03-29 | 1984-03-29 | Terminal part of coated optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60205407A JPS60205407A (en) | 1985-10-17 |
| JPH0574044B2 true JPH0574044B2 (en) | 1993-10-15 |
Family
ID=13174283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59061548A Granted JPS60205407A (en) | 1984-03-29 | 1984-03-29 | Terminal part of coated optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60205407A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63184712A (en) * | 1986-09-26 | 1988-07-30 | Sumitomo Electric Ind Ltd | Splicing method for optical fiber |
| JPH07104455B2 (en) * | 1987-09-03 | 1995-11-13 | 住友電気工業株式会社 | Optical fiber high strength connection method |
| JPH02195304A (en) * | 1989-01-23 | 1990-08-01 | Sumitomo Electric Ind Ltd | Fusion splicing method for optical fiber |
| GB8927964D0 (en) * | 1989-12-11 | 1990-02-14 | Kodak Ltd | Method and apparatus for recovering silver from a photographic fixing solution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57125915A (en) * | 1981-01-29 | 1982-08-05 | Fujitsu Ltd | Production of optical fiber connector |
| JPS5969709A (en) * | 1982-10-15 | 1984-04-20 | Fujitsu Ltd | Method for surface treatment of optical fiber terminal |
-
1984
- 1984-03-29 JP JP59061548A patent/JPS60205407A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57125915A (en) * | 1981-01-29 | 1982-08-05 | Fujitsu Ltd | Production of optical fiber connector |
| JPS5969709A (en) * | 1982-10-15 | 1984-04-20 | Fujitsu Ltd | Method for surface treatment of optical fiber terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60205407A (en) | 1985-10-17 |
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