JP2915195B2 - Optical fiber material and its manufacturing method - Google Patents
Optical fiber material and its manufacturing methodInfo
- Publication number
- JP2915195B2 JP2915195B2 JP3349117A JP34911791A JP2915195B2 JP 2915195 B2 JP2915195 B2 JP 2915195B2 JP 3349117 A JP3349117 A JP 3349117A JP 34911791 A JP34911791 A JP 34911791A JP 2915195 B2 JP2915195 B2 JP 2915195B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- metal
- tube
- metal tube
- coated
- 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 87
- 239000000463 material Substances 0.000 title claims description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 82
- 239000002184 metal Substances 0.000 claims description 82
- 238000007747 plating Methods 0.000 claims description 21
- 239000000835 fiber Substances 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 238000009713 electroplating Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000008151 electrolyte solution Substances 0.000 claims description 8
- 239000002657 fibrous material Substances 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 25
- 229910052802 copper Inorganic materials 0.000 description 25
- 239000010949 copper Substances 0.000 description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 24
- 229910052759 nickel Inorganic materials 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002659 electrodeposit Substances 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種の計測制御や物性
測定のために真空容器壁を貫通させても空気洩れが発生
せず、苛酷な使用環境において耐久性が優れている光フ
ァイバ素材及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber material which does not leak air even when it is penetrated through a vacuum vessel wall for various types of measurement control and physical property measurement, and has excellent durability in a severe use environment. And its manufacturing method.
【０００２】[0002]
【従来の技術】真空技術の発展に伴って実用化可能にな
った超伝導発電や超伝導電力貯蔵などでは、超伝導材料
を低温に保持するために真空断熱構造になった容器が使
用されることになる。このような真空容器を用いた場
合、その内部の状態を常に計測して正確に制御する必要
があり、且つ各種の材料を真空下で使用するために、こ
れらの材料の物性を真空条件下で測定することを要す
る。2. Description of the Related Art In superconducting power generation and superconducting power storage, which have become practical due to the development of vacuum technology, a container having a vacuum insulation structure is used to keep a superconducting material at a low temperature. Will be. When such a vacuum vessel is used, it is necessary to always measure its internal state and accurately control it, and in order to use various materials under vacuum, the physical properties of these materials must be measured under vacuum conditions. It needs to be measured.
【０００３】 真空容器内部における計測制御や物性測
定には、一般に各種のセンサを用い、該センサで計測し
たアナログ信号をデジタル信号や周波数変調してから、
光ファイバによって容器外部へ伝送することが多くなっ
ている。光ファイバは、計測値などを正確に伝送できる
ので好ましく、且つ細くて防爆性を有するうえに真空や
低温における耐久性も優れている。In general, various sensors are used for measurement control and physical property measurement inside a vacuum vessel, and an analog signal measured by the sensor is modulated into a digital signal or a frequency.
Transmission to the outside of the container by an optical fiber is increasing. An optical fiber is preferable because it can accurately transmit measured values and the like, is thin, has explosion-proof properties, and has excellent durability in vacuum and at low temperatures.
【０００４】[0004]
【発明が解決しようとする課題】光ファイバで真空容器
の内部から外部へ信号を伝送するには、従来では真空性
を損わないように気密アダプタを介して行なっている。
この気密アダプタは、容器壁に密封取付けするフランジ
の中央に固着した石英ガラス板を備え、該ガラス板の両
側に光ファイバ心線の先端部を同軸状に対向取付けする
とともに、各ファイバ心線の先端に球レンズを設置して
いる。一方の球レンズは、シングルモード形光ファイバ
から出る光を一旦拡散させて石英レンズを通過させ、他
方の球レンズは、通過後に再び光を集束させて光ファイ
バに結合させる。このような球レンズの設置により、気
密アダプタを介した光ファイバ心線の伝送効率がかなり
高くなるけれども、それでもかなりの伝送損失を発生す
ることになる。Conventionally, transmission of a signal from the inside of a vacuum vessel to the outside using an optical fiber is performed through a hermetic adapter so as not to impair the vacuum.
This hermetic adapter includes a quartz glass plate fixed to the center of a flange that is hermetically attached to the container wall. At the both sides of the glass plate, the ends of the optical fiber cores are coaxially opposed to each other, and the respective fiber cores are attached. A ball lens is installed at the tip. One spherical lens once diffuses the light emitted from the single mode optical fiber and passes through the quartz lens, and the other spherical lens focuses the light again after passing through and couples the light to the optical fiber. Although the transmission efficiency of the optical fiber core through the hermetic adapter is considerably increased by the installation of such a spherical lens, a considerable transmission loss is still generated.
【０００５】 この伝送損失を回避するには、気密アダ
プタを介さずに、光ファイバ心線が真空容器壁を貫通す
ればよいのは明白であるが、光ファイバはきわめて折れ
やすいために、プラスチック被覆した程度の光ファイバ
心線を直接貫通させることは到底不可能である。また、
この光ファイバ心線を金属キャピラリに挿入するとして
も、該ファイバ心線の外周とキャピラリ内周との間が気
密でないため、真空容器壁の貫通に使用することはでき
なかった。It is clear that the transmission loss can be avoided by passing the optical fiber through the vacuum vessel wall without using an airtight adapter. However, since the optical fiber is extremely fragile, it is difficult to use a plastic coating. It is almost impossible to directly penetrate such an optical fiber. Also,
Even if this optical fiber core is inserted into a metal capillary, it cannot be used to penetrate the vacuum vessel wall because the space between the outer periphery of the fiber core and the inner periphery of the capillary is not airtight.
【０００６】 これに対し、本発明者らが提案した特願
平３−１６３４９３号では、金属皮膜を有する光ファイ
バ心線の全体を細長い金属チューブ中に嵌入し、この金
属チューブをダイスを通して縮径加工することにより、
金属チューブの内周面を光ファイバの金属皮膜と密接さ
せている。この縮径加工によって、気密性が１０-6〜１
０-7ｃｃ／ｓｅｃ・ａｔｍとかなり高くなるけれども、
この程度の気密性では真空容器壁の貫通に使用すること
はできない。また、縮径加工後の金属チューブの内周面
と光ファイバの金属皮膜の外周面との間に接合軟ろう層
を介在させると、その気密性はいっそう高くなるけれど
も、この場合には光ファイバ心線の使用長が一般に短
く、長さが数十ｍｍであると高温域においてチューブ中
で光ファイバ心線が不安定になる。On the other hand, in Japanese Patent Application No. 3-163493 proposed by the present inventors, an entire optical fiber core having a metal film is fitted into an elongated metal tube, and the metal tube is reduced in diameter through a die. By processing
The inner peripheral surface of the metal tube is brought into close contact with the metal coating of the optical fiber. The airtightness is 10 -6 to 1 by this diameter reduction processing.
Although it is quite high at 0 -7 cc / sec · atm,
This degree of tightness cannot be used to penetrate the vacuum vessel wall. If a soft solder layer is interposed between the inner peripheral surface of the metal tube after diameter reduction processing and the outer peripheral surface of the metal coating of the optical fiber, the airtightness is further improved. If the used length of the core wire is generally short and is several tens of mm, the optical fiber core wire becomes unstable in the tube in a high temperature range.
【０００７】 本発明は、真空容器壁を貫通させた際に
問題になる光ファイバ素材の気密性を改善するために提
案されたものであり、真空容器壁を貫通させた際に空気
洩れが発生しない光ファイバ素材及びその製造方法を提
供することを目的としている。本発明の他の目的は、真
空や高温などの苛酷な使用環境において耐久性が優れた
光ファイバ素材及びその製造方法を提供するものであ
る。The present invention has been proposed to improve the airtightness of an optical fiber material, which becomes a problem when penetrating the vacuum vessel wall, and air leakage occurs when penetrating the vacuum vessel wall. It is an object of the present invention to provide an optical fiber material that does not use the same and a manufacturing method thereof. Another object of the present invention is to provide an optical fiber material having excellent durability in a severe use environment such as vacuum or high temperature, and a method for manufacturing the same.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る光ファイバ素材１は、図１に示すよう
に、光ファイバ２上にコートした金属皮膜３を有する光
ファイバ心線４と、該光ファイバ心線と嵌合配置する細
長い金属管５とを有する。図６に示す光ファイバ素材１
では、金属管５の端部だけを電解によって除去し、光フ
ァイバ２の金属皮膜３の外周面に金属管５の端面に達す
る金属めっき層６を形成している。In order to achieve the above object, an optical fiber material 1 according to the present invention comprises an optical fiber core having a metal coating 3 coated on an optical fiber 2 as shown in FIG. 4 and an elongated metal tube 5 fitted and arranged with the optical fiber core. Optical fiber material 1 shown in FIG.
Then, only the end of the metal tube 5 is removed by electrolysis, and a metal plating layer 6 reaching the end surface of the metal tube 5 is formed on the outer peripheral surface of the metal film 3 of the optical fiber 2.
【０００９】 光ファイバ２上にコートする金属皮膜３
は、直接光ファイバ２上にコートしてもよいが、通常は
光ファイバ２にカーボン皮膜（図示しない）を被覆して
から、無電解めっき法，真空蒸着法，スパッタリング
法，イオンめっき法などでまず数μｍ以下の厚さに形成
し、更に電気めっき法で所定厚に形成すればよく、その
素材は銅，ニッケル，アルミニウム，銀，金などであ
る。金属管５の内径は、光ファイバ心線４が挿入可能な
範囲でできるだけ小さいと好ましい。金属管５の素材
も、金属皮膜３と同様に銅，錫，ニッケル，銀，金など
から選択することになる。Metallic coating 3 coated on optical fiber 2
May be directly coated on the optical fiber 2, but usually, the optical fiber 2 is coated with a carbon film (not shown), and then is subjected to an electroless plating method, a vacuum deposition method, a sputtering method, an ion plating method, or the like. First, it may be formed to a thickness of several μm or less, and may be further formed to a predetermined thickness by an electroplating method, and the material is copper, nickel, aluminum, silver, gold, or the like. It is preferable that the inner diameter of the metal tube 5 be as small as possible within a range in which the optical fiber 4 can be inserted. The material of the metal tube 5 is selected from copper, tin, nickel, silver, gold, and the like, like the metal film 3.
【００１０】 本発明では、光ファイバ素材１の端部に
おいて光ファイバ２の金属皮膜３だけが存在することが
必要である。これには、金属管５の端面を光ファイバ心
線４の端面よりもやや後方まで挿入するだけでよく、所
望に応じて挿入後に縮径加工してもよい。この段差挿入
が不可能ならば、金属管５に嵌入したファイバ心線４の
端部を電解液又は溶解液に浸漬し、金属管の端部だけを
除去することが必要である。このため、光ファイバ心線
４にコートした金属皮膜３を構成する金属は、通常、金
属管５の素材金属と異なり、該金属管を電解又は溶解す
る溶液に対して実質的に反応しない。In the present invention, it is necessary that only the metal coating 3 of the optical fiber 2 exists at the end of the optical fiber material 1. For this purpose, it is only necessary to insert the end face of the metal tube 5 slightly behind the end face of the optical fiber core wire 4, and the diameter may be reduced after the insertion as desired. If the step cannot be inserted, it is necessary to immerse the end of the fiber core wire 4 fitted in the metal tube 5 in an electrolytic solution or a solution to remove only the end of the metal tube. For this reason, the metal constituting the metal film 3 coated on the optical fiber core wire 4 does not substantially react with a solution for electrolyzing or dissolving the metal tube, unlike the material metal of the metal tube 5.
【００１１】 本発明方法では、図２に例示するよう
に、金属皮膜３を有する光ファイバ心線４を細長い金属
管５中に嵌入し、この管被覆ファイバ心線の端部を電解
液又は溶解液に浸漬して金属管５の端部だけを除去する
（図３参照）。例えば、電解液を適宜選択したり電位の
変化を検知することにより、銅などの金属管５の端部を
電解反応で除去し、ニッケルなどの金属皮膜３だけを残
存させる。また、塩酸水溶液を用いることにより、アル
ミニウムなどの金属管の端部を溶解除去し、銅などの金
属皮膜だけを残存させる。In the method of the present invention, as illustrated in FIG. 2, an optical fiber core 4 having a metal coating 3 is fitted into an elongated metal tube 5, and an end of the tube-coated fiber core is electrolytically or dissolved. It is immersed in a liquid to remove only the end of the metal tube 5 (see FIG. 3). For example, by appropriately selecting an electrolytic solution or detecting a change in potential, the end of the metal tube 5 such as copper is removed by an electrolytic reaction, and only the metal film 3 such as nickel remains. In addition, by using an aqueous hydrochloric acid solution, the end of a metal tube such as aluminum is dissolved and removed, leaving only a metal film such as copper.
【００１２】 この管被覆ファイバ心線の端部におい
て、光ファイバ２上の金属皮膜３の外周面に金属管５の
端面に達する範囲まで電気めっきを施して、光ファイバ
素材１の気密性を高める金属めっき層６を形成すればよ
い。電気めっきを施す際に、金属皮膜３の外周面端部に
熱可塑性樹脂７（図４）を塗布し、電気めっきを施した
後に該熱可塑性樹脂を除去すると、金属めっき層６が不
必要な個所にまで形成されることがないので好ましい。At the end of the tube-coated fiber core, the outer peripheral surface of the metal coating 3 on the optical fiber 2 is electroplated to reach the end surface of the metal tube 5 to improve the airtightness of the optical fiber material 1. The metal plating layer 6 may be formed. When the electroplating is performed, a thermoplastic resin 7 (FIG. 4) is applied to an end portion of the outer peripheral surface of the metal film 3, and after the electroplating, the thermoplastic resin is removed. This is preferable because it is not formed at any location.
【００１３】[0013]
【作用】本発明方法では、光ファイバ心線４を金属管５
中に嵌入してから、金属皮膜３の外周面において金属管
５の端面に達する金属めっき層６を形成することによ
り、該被覆管と光ファイバ２上の金属皮膜３との境界面
がいっそう気密になる。こうして得た光ファイバ素材１
は、気密性が約１０-9ｃｃ／ｓｅｃ・ａｔｍと非常に高
くなり、真空容器壁の貫通に使用できる気密性を有する
ことになる。また、本発明の光ファイバ素材１は、光フ
ァイバ２を金属皮膜３及び金属管５で覆っているので耐
久性及び耐屈曲性も優れている。According to the method of the present invention, the optical fiber core wire 4 is connected to the metal tube 5.
The metal plating layer 6 is formed on the outer peripheral surface of the metal film 3 to reach the end face of the metal tube 5 after being inserted therein, so that the boundary surface between the coating tube and the metal film 3 on the optical fiber 2 is more airtight. become. Optical fiber material 1 thus obtained
Has a very high airtightness of about 10 −9 cc / sec · atm, and has airtightness that can be used to penetrate the vacuum vessel wall. Further, the optical fiber material 1 of the present invention has excellent durability and bending resistance because the optical fiber 2 is covered with the metal film 3 and the metal tube 5.
【００１４】[0014]
【実施例】次に、本発明を実施例に基づいて説明する。 実施例１ コア径が１０μｍであるシングルモード光ファイバ（ク
ラッド径１２５μｍ）２上に、カーボン皮膜及び下地金
属皮膜を薄くコートしてから、厚さ５μｍのニッケル皮
膜３をコートすると、光ファイバ心線４の外径は１３５
μｍである。この光ファイバ心線４を、図２に示すよう
に、外径０.４μｍ，内径０.１６μｍ，厚さ１２０μｍ
の被覆銅管５に徐々に挿入する。Next, the present invention will be described based on embodiments. Example 1 A single-mode optical fiber (cladding diameter: 125 μm) 2 having a core diameter of 10 μm is coated with a thin carbon coating and a base metal coating, and then coated with a nickel coating 3 having a thickness of 5 μm. The outer diameter of 4 is 135
μm. As shown in FIG. 2, the optical fiber core wire 4 was made to have an outer diameter of 0.4 μm, an inner diameter of 0.16 μm, and a thickness of 120 μm.
Is gradually inserted into the coated copper tube 5.
【００１５】 次に、被覆銅管５に嵌入した光ファイバ
心線４の端部５０ｍｍを、図３に示すように、過硫酸ア
ンモニウム１０ｇ／ｌを含む電解液８中に浸漬する。こ
の管被覆ファイバ心線を陽極として９Ｖの電圧を掛け、
５分間電解を行なう。この結果、液面下から約１０ｍｍ
の部分９はテーパ状に被覆銅管が残存するけれども、残
りの４０ｍｍではニッケル皮膜３をコートした光ファイ
バ２が露出する。Next, as shown in FIG. 3, the end portion 50 mm of the optical fiber core wire 4 fitted in the coated copper tube 5 is immersed in an electrolytic solution 8 containing 10 g / l of ammonium persulfate. A voltage of 9 V was applied using the tube-coated fiber core as an anode,
Perform electrolysis for 5 minutes. As a result, about 10 mm from below the liquid level
Although the coated copper tube remains in a tapered shape in the portion 9, the optical fiber 2 coated with the nickel film 3 is exposed in the remaining 40 mm.
【００１６】 被覆銅管５が残存するテーパ部分９の先
端から約５ｍｍ幅のニッケル皮膜部分１０（図４）を残
し、露出したニッケル皮膜３上に熱可塑性樹脂（商品
名：エレクトロンワックス、宗化学社製）７をコーティ
ングする。この管被覆ファイバ心線１１は、図５に示す
ように、Ｈ2ＳＯ4３０ｇ／ｌ及びＣｕＳＯ4２４０ｇ／
ｌを含む銅めっき液１２中に浸漬し、管被覆ファイバ心
線１１を陰極として電流密度１０Ａ／ｄｍ2の条件で１
０分間電気めっきを行ない、テーパ部分９とニッケル皮
膜部分１０上に銅を電着する。A nickel resin portion 10 (FIG. 4) having a width of about 5 mm is left from the tip of the tapered portion 9 where the coated copper tube 5 remains, and a thermoplastic resin (trade name: Electron Wax; Co., Ltd.) 7 is coated. As shown in FIG. 5, the tube-coated fiber core 11 is made of H 2 SO 4 30 g / l and CuSO 4 240 g / l.
1 in a copper plating solution 12 containing 1 l, and using a tube-coated fiber core wire 11 as a cathode at a current density of 10 A / dm 2.
Electroplating is performed for 0 minutes, and copper is electrodeposited on the tapered portion 9 and the nickel film portion 10.
【００１７】 この結果、厚さ約２０μｍの銅めっき層
６が形成されることにより、図６に示すように、光ファ
イバ素材１の端部において、被覆銅管５とニッケル皮膜
３との境界面が銅めっき層６で完全に覆われることにな
る。銅めっき後に管被覆ファイバ心線１１をめっき液１
２から取り出し、熱可塑性樹脂７を除去してから、光フ
ァイバ素材１の気密性を常法によって測定すると約１０
-9ｃｃ／ｓｅｃ・ａｔｍとなり、気密性が非常に向上し
ている。As a result, a copper plating layer 6 having a thickness of about 20 μm is formed, so that an interface between the coated copper tube 5 and the nickel coating 3 is formed at the end of the optical fiber material 1 as shown in FIG. Is completely covered with the copper plating layer 6. After copper plating, tube-coated fiber core wire 11 is plated with plating solution 1
2, and after removing the thermoplastic resin 7, the airtightness of the optical fiber material 1 is measured by a conventional method to be about 10
-9 cc / sec · atm, and the airtightness is greatly improved.
【００１８】実施例２ 実施例１で用いた光ファイバ心線５０ｃｍを、内径１５
０μｍ，外径３８０μｍ及び長さ３０ｃｍの被覆銅管１
３（図７）に徐々に挿入する。この挿入完了後に、管被
覆ファイバ心線全体を内径３５０μｍのダイス（図示し
ない）を通して縮径加工すると、縮径加工後において光
ファイバ心線は被覆銅管の外に１６０ｍｍ残り、この時
の被覆銅管１３の減面率は１４.４％、被覆管内空間の
減空間率は１９.１％である。Example 2 The optical fiber core wire 50 cm used in Example 1 was
Coated copper tube 1 with 0 μm, outer diameter 380 μm and length 30 cm
3 (FIG. 7). After the insertion is completed, the entire diameter of the tube-coated fiber core is reduced through a die (not shown) having an inner diameter of 350 μm. After the diameter-reduction processing, the optical fiber core remains 160 mm outside the coated copper tube. The area reduction rate of the tube 13 is 14.4%, and the space reduction rate of the space inside the cladding tube is 19.1%.
【００１９】 次に、被覆銅管１３の口出し部分を除い
てから、光ファイバ心線の端部５０ｍｍを、実施例１と
同様の電解液中に浸漬して１０分間電解を行なう。この
結果、液面下では被覆銅管１３が完全に除去されて、ニ
ッケル皮膜３をコートした光ファイバ２が露出する。こ
の管被覆ファイバ心線は、実施例１と同様に、被覆銅管
１３の先端から約８ｍｍ幅を残して、露出したニッケル
皮膜３上に熱可塑性樹脂（図示しない）をコーティング
してから、１０分間電気めっきを行ない、ニッケル皮膜
部分上に銅を電着する。Next, after removing the protruding portion of the coated copper tube 13, the end portion 50 mm of the optical fiber core is immersed in the same electrolytic solution as in Example 1 to perform electrolysis for 10 minutes. As a result, the coated copper tube 13 is completely removed below the liquid level, and the optical fiber 2 coated with the nickel film 3 is exposed. This tube-coated fiber core is coated with a thermoplastic resin (not shown) on the exposed nickel film 3 except for a width of about 8 mm from the tip of the coated copper tube 13 in the same manner as in Example 1. Electroplating for one minute and then electrodeposit copper on the nickel coating.
【００２０】 銅めっき後に、管被覆ファイバ心線をめ
っき液から取り出し、先端部の熱可塑性樹脂を除去する
と、図７に示す光ファイバ素材１４を得る。この結果、
被覆銅管１３の端面において銅めっき層１５が形成され
ることにより、被覆銅管１３とニッケル皮膜３との境界
面が銅めっき層１５で完全に覆われることになる。光フ
ァイバ素材１４の気密性を常法によって測定すると約１
０-9ｃｃ／ｓｅｃ・ａｔｍとなり、縮径加工だけでは気
密性が１０-6〜１０-7ｃｃ／ｓｅｃ・ａｔｍであるから
気密性が向上している。After the copper plating, the tube-coated fiber core wire is taken out of the plating solution, and the thermoplastic resin at the tip is removed to obtain the optical fiber material 14 shown in FIG. As a result,
By forming the copper plating layer 15 on the end face of the coated copper tube 13, the boundary surface between the coated copper tube 13 and the nickel film 3 is completely covered with the copper plating layer 15. The airtightness of the optical fiber material 14 is about 1
The airtightness is 0 -9 cc / sec · atm, and the airtightness is 10 -6 to 10 -7 cc / sec · atm only by the diameter reduction processing, so that the airtightness is improved.
【００２１】[0021]
【発明の効果】本発明に係る光ファイバ素材は、露出し
た光ファイバ心線と金属管との間に金属めっき層を形成
し、電気めっきによる金属めっき層で気密性が約１０-9
ｃｃ／ｓｅｃ・ａｔｍと向上することにより、各種の真
空容器内の測定のために容器壁を貫通させても空気洩れ
が殆ど発生しない。本発明の光ファイバ素材を用いる
と、気密アダプタを介さずに１本の光ファイバだけで真
空容器の内部から外部へ直接伝送でき、その際の伝送損
失をほぼ完全に回避することができる。The optical fiber material according to the present invention is exposed to light.
Metal plating layer between the broken optical fiber core and metal tube
The airtightness is about 10 -9 with the metal plating layer by electroplating.
By improving to cc / sec · atm, air leakage hardly occurs even if the container wall is penetrated for measurement in various vacuum containers. When the optical fiber material of the present invention is used, it is possible to directly transmit from the inside of the vacuum vessel to the outside with only one optical fiber without using an airtight adapter, and transmission loss at that time can be almost completely avoided.
【００２２】 本発明の光ファイバ素材は、光ファイバ
の大部分を金属皮膜及び金属管で覆っているので、気密
性が高いうえに耐久性及び耐屈曲性が優れ、壁厚が厚い
金属管によって十分な耐熱性と機械強度を有し、耐熱・
耐火用素材として好適である。電気めっき法で形成する
金属めっき層は、半田によって光ファイバ心線と金属管
との間を密封する場合と比べて気密性が高く、使用する
金属の量も一般的に少なくなる。The optical fiber material of the present invention is an optical fiber
Air- tight because most of the
High durability, excellent durability and bending resistance, thick wall
The metal tube has sufficient heat resistance and mechanical strength,
It is suitable as a refractory material. Formed by electroplating
The metal plating layer is made by soldering the optical fiber core and the metal tube.
Higher airtightness than when sealing between
The amount of metal is also generally lower .
【００２３】 本発明方法は、光ファイバ素材の気密性
を改善し、該ファイバ素材が真空容器壁などを貫通した
際に空気洩れが殆ど発生しなくなる。本発明方法で得た
光ファイバ素材は、縮径加工後に光ファイバ上の金属皮
膜の外周面との間に接合軟ろう層を介在させる場合と比
べて、光ファイバ心線の使用長が一般に長いため、高温
域において金属管中で不安定になるようなことも発生し
ない。[0023] The method of the present invention relates to the airtightness of an optical fiber material.
The fiber material penetrated the vacuum vessel wall etc.
In this case, air leakage hardly occurs. The optical fiber material obtained by the method of the present invention is characterized in that the use of the optical fiber core wire is smaller than that in the case where the soft solder layer is interposed between the optical fiber material and the outer peripheral surface of the metal film on the optical fiber after the diameter reduction. Since the length is generally long, instability in a metal tube in a high temperature range does not occur.
【図１】 本発明に係る光ファイバ素材を示す拡大横断
面図である。FIG. 1 is an enlarged cross-sectional view showing an optical fiber material according to the present invention.
【図２】 本発明で用いる光ファイバ心線を金属管に嵌
入する態様を示す拡大縦断面図である。FIG. 2 is an enlarged longitudinal sectional view showing a mode in which an optical fiber used in the present invention is inserted into a metal tube.
【図３】 管被覆ファイバ心線を電解液に浸漬した状態
を示す概略断面図である。FIG. 3 is a schematic sectional view showing a state in which a tube-coated fiber core is immersed in an electrolytic solution.
【図４】 管被覆ファイバ心線の端部に熱可塑性樹脂を
コーティングした状態を示す概略断面図である。FIG. 4 is a schematic cross-sectional view showing a state where an end of a tube-coated fiber core is coated with a thermoplastic resin.
【図５】 図４の管被覆ファイバ心線をめっき液に浸漬
した状態を示す概略断面図である。FIG. 5 is a schematic sectional view showing a state where the tube-coated fiber core wire of FIG. 4 is immersed in a plating solution.
【図６】 本発明の光ファイバ素材の一例を示す拡大縦
断面図である。FIG. 6 is an enlarged longitudinal sectional view showing an example of the optical fiber material of the present invention.
【図７】 光ファイバ素材の変形例を示す拡大縦断面図
である。FIG. 7 is an enlarged vertical sectional view showing a modification of the optical fiber material.
１ 光ファイバ素材 ２ 光ファイバ ３ 金属皮膜 ５ 金属管 ６ 金属めっき層 ７ 熱可塑性樹脂 Reference Signs List 1 optical fiber material 2 optical fiber 3 metal film 5 metal tube 6 metal plating layer 7 thermoplastic resin
フロントページの続き (72)発明者 黒羽 敏明 大阪府寝屋川市楠根北町２番５号 協和 電線株式会社内 (72)発明者 小村 憲一 東京都千代田区丸の内２丁目６番１号 古河電気工業株式会社内 (72)発明者 小倉 邦男 東京都千代田区丸の内２丁目６番１号 古河電気工業株式会社内 (56)参考文献 特開 昭54−74453（ＪＰ，Ａ) 特開 昭59−184313（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G02B 6/44 Continuing on the front page (72) Inventor Toshiaki Kuroba 2-5, Kusunekitamachi, Neyagawa-shi, Osaka Kyowa Electric Wire Co., Ltd. (72) Inventor Kenichi Komura 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Kunio Ogura 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (56) References JP-A-54-74453 (JP, A) JP-A-59-184313 (JP, A (58) Fields surveyed (Int.Cl. 6 , DB name) G02B 6/44
Claims (5)
ファイバ心線と、該光ファイバ心線と嵌合配置する細長
い金属管とを有し、端部がテーパ状になった金属管を一
部残して光ファイバ心線は露出しており、光ファイバ心
線の金属皮膜から金属管のテーパ部分まで金属めっき層
を形成し、この金属めっき層は電気めっきによって気密
に覆っている光ファイバ素材。1. A light in which a metal film is coated on an optical fiber.
A fiber core, and an elongated metal tube arranged mating with said optical fiber, a metal tube end portion is tapered one
The optical fiber core is exposed, leaving
A metal plating layer is formed from the metal coating on the wire to the tapered portion of the metal tube , and this metal plating layer is airtight by electroplating.
The optical fiber material covering the .
ファイバ心線と、該光ファイバ心線と嵌合配置する細長
い金属管とを有し、縮径加工した金属管を一部残して光
ファイバ心線は露出しており、光ファイバ心線の金属皮
膜から金属管の端部まで金属めっき層を形成し、この金
属めっき層は電気めっきによって気密に覆っている光フ
ァイバ素材。2. A light in which a metal film is coated on an optical fiber.
A fiber core wire and an elongated member fitted and arranged with the optical fiber core wire
With a small metal tube, leaving a part of the metal tube whose diameter has been reduced.
The optical fiber core is exposed and the metal sheath of the optical fiber core is
A metal plating layer is formed from the film to the end of the metal tube.
The metal plating layer is an optical fiber material that is airtightly covered by electroplating .
い金属管中に嵌入し、この管被覆ファイバ心線の端部を
電解液又は溶解液に浸漬して金属管の端部だけを除去し
てから、光ファイバの金属皮膜の外周面において金属管
の端面に達する範囲まで電気めっきを施す光ファイバ素
材の製造方法。3. An optical fiber core having a metal coating is fitted into an elongated metal tube, and the end of the tube coated fiber is immersed in an electrolytic solution or a solution to remove only the end of the metal tube. A method for producing an optical fiber material in which electroplating is performed until the outer peripheral surface of the metal coating of the optical fiber reaches the end surface of the metal tube.
い金属管中に嵌入し、この管被覆ファイバ心線の一部を
電解液又は溶解液に浸漬して金属管の端部を除去してか
ら、光ファイバの金属皮膜の一部を残してその外周面端
部に熱可塑性樹脂を塗布し、ついで金属管の端面に達す
る範囲に電気めっきを施した後に、該熱可塑性樹脂を除
去する光ファイバ素材の製造方法。4. An optical fiber core having a metal coating is inserted into an elongated metal tube, and a part of the tube coated fiber core is immersed in an electrolytic solution or a solution to remove an end of the metal tube. From the above, a thermoplastic resin is applied to an end portion of the outer peripheral surface of the optical fiber while leaving a part of the metal film, and then electroplating is performed to reach an end surface of the metal tube, and then a light for removing the thermoplastic resin is applied. Fiber material manufacturing method.
径加工してから、この管被覆ファイバ心線の一部を電解
液又は溶解液に浸漬する請求項３又は４記載の製造方
法。5. The manufacturing method according to claim 3, wherein the optical fiber is inserted into a metal tube to reduce the diameter, and then a part of the tube coated fiber is immersed in an electrolytic solution or a solution. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3349117A JP2915195B2 (en) | 1991-12-05 | 1991-12-05 | Optical fiber material and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3349117A JP2915195B2 (en) | 1991-12-05 | 1991-12-05 | Optical fiber material and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05157949A JPH05157949A (en) | 1993-06-25 |
| JP2915195B2 true JP2915195B2 (en) | 1999-07-05 |
Family
ID=18401607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3349117A Expired - Lifetime JP2915195B2 (en) | 1991-12-05 | 1991-12-05 | Optical fiber material and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2915195B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0217538D0 (en) * | 2002-07-30 | 2002-09-11 | Mbda Uk Ltd | An optical fibre |
-
1991
- 1991-12-05 JP JP3349117A patent/JP2915195B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05157949A (en) | 1993-06-25 |
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