JPH045964B2 - - Google Patents
Info
- Publication number
- JPH045964B2 JPH045964B2 JP57192556A JP19255682A JPH045964B2 JP H045964 B2 JPH045964 B2 JP H045964B2 JP 57192556 A JP57192556 A JP 57192556A JP 19255682 A JP19255682 A JP 19255682A JP H045964 B2 JPH045964 B2 JP H045964B2
- Authority
- JP
- Japan
- Prior art keywords
- diamond
- fiber
- coated
- carbon
- present
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 229910003460 diamond Inorganic materials 0.000 claims description 8
- 239000010432 diamond Substances 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002250 progressing effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229910005793 GeO 2 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000002003 electron diffraction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4402—Optical cables with one single optical waveguide
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Description
(イ) 技術分野
本発明は長期間の使用において機械的強度の劣
化しない光フアイバーに関する。
(ロ) 背景技術
可視光または赤外光を伝送するいわゆる光フア
イバー通信手段として大容量の伝送が可能であ
り、雑音の混入が少なく減衰率を極小に抑えるこ
とができるので実用化が進められている。この光
フアイバーはガラス、プラスチツクまたはアルカ
リハライドによりつくられ、屈折率の分布を与え
て減衰率を低下させている。
これ等のフアイバーの最大の欠点は通常の大気
中で使用した場合、次第に破断し易くなるという
ことである。これは大気中の湿気の凝集によつて
一種の応力腐食割れのような現象を生じ微小クラ
ツクが発達する為である。
本発明者等は上記のような光フアイバーの経年
変化を抑止する為のフアイバー表面処理を検討し
本発明に至つた。
(ハ) 発明の開示
本発明はフアイバー表面における水分の吸着を
防止し、またクラツクの進展が腐食により進行し
ないように、ダイヤモンドもしくはダイヤモンド
状炭素を被覆した光フアイバに関するものであ
る。
ダイヤモンドはいかなる腐食物質にも極めて安
定であり、上記のクラツクの進展防止には好適の
物質である。
ダイヤモンド状炭素とは炭化水素のプラズマ中
での分解で得られるダイヤモンドに近い結晶形を
し非晶質相を含む構造で電子線回折によりブロー
ドニングしたダイヤモンドの回折線を得ることが
できる。このダイヤモンド状炭素も又、腐食に対
し極めて強い性質を持つている。
これ等の膜は500Å以下では十分にその効果を
表わさないが、これはフアイバー上の微小な凹凸
を十分覆うことができない為と考えられる。また
30μ以上では却つて亀裂進度がし易くなり、強
度、曲げに対する強度が下がる。
ダイヤモンド、ダイヤモンド状炭素の被覆は
CVD法、プラズマCVD法、イオンビーム蒸着法
等、公知の方法で行うことができる。
実施例 １
90％SiO2と残量がGeO2、P2O5からなる0.25mm
φのフアイバーに、高周波分解法にてC2H6を分
解して0.3μの被膜を被覆した。この被膜は反射電
子線回折の結果、ダイヤモンド状炭素であると認
められた。この外層に更にシリコン樹脂を0.3mm
被覆した。
比較材として同じ組成のフアイバーに直接シリ
コン樹脂のみを0.3mm被覆した。
これらを60℃の温度、90％の湿度の大気中にさ
らして、各100本ずつ、荷重２Kgをかけて加速試
験を行つた。フアイバーの50％が破断するまでの
時間を測つたところ、本発明のもので11分、比較
材のものは0.4分であつた。
実施例 ２
95％SiO2と残量がBe2O3、Ｆからなる0.15mmφ
のフアイバーに公知プラズマCVD法でダイヤモ
ンドを300Å〜50μｍ被覆した。
各100本ずつ、引張りスパン５ｍ、引張速度５
％／mmで引張り破断強度を測定した結果を第１表
に示す。
(a) Technical Field The present invention relates to an optical fiber whose mechanical strength does not deteriorate even after long-term use. (b) Background technology As a so-called optical fiber communication means for transmitting visible light or infrared light, it is capable of large-capacity transmission, has little noise contamination, and can keep the attenuation rate to a minimum, so its practical use is progressing. There is. The optical fiber is made of glass, plastic, or alkali halide and has a refractive index profile to reduce the attenuation rate. The biggest drawback of these fibers is that they tend to break easily when used in normal atmosphere. This is because the condensation of moisture in the atmosphere causes a phenomenon similar to stress corrosion cracking and the development of microcracks. The present inventors have studied fiber surface treatments for suppressing the aging of optical fibers as described above, and have arrived at the present invention. (c) Disclosure of the Invention The present invention relates to an optical fiber coated with diamond or diamond-like carbon to prevent moisture adsorption on the fiber surface and to prevent cracks from progressing due to corrosion. Diamond is extremely stable against any corrosive substances and is a suitable material for preventing the above-mentioned crack from progressing. Diamond-like carbon is obtained by decomposing hydrocarbons in plasma and has a crystalline shape similar to that of diamond, with a structure that includes an amorphous phase, and it is possible to obtain a broadened diamond diffraction line by electron beam diffraction. This diamond-like carbon is also extremely resistant to corrosion. These films do not exhibit sufficient effect at a thickness of less than 500 Å, but this is thought to be because they cannot sufficiently cover the minute irregularities on the fiber. Also
If it exceeds 30μ, cracks will progress more easily and the strength and resistance to bending will decrease. Diamond, diamond-like carbon coating
This can be performed by a known method such as a CVD method, a plasma CVD method, or an ion beam evaporation method. Example 1 0.25mm consisting of 90% SiO 2 and remaining amount GeO 2 and P 2 O 5
A φ fiber was coated with a 0.3μ film by decomposing C 2 H 6 using a high frequency decomposition method. This coating was confirmed to be diamond-like carbon as a result of reflection electron diffraction. Add 0.3mm of silicone resin to this outer layer.
coated. As a comparative material, a fiber of the same composition was directly coated with 0.3 mm of silicone resin. These were exposed to the atmosphere at a temperature of 60°C and a humidity of 90%, and an accelerated test was conducted by applying a load of 2 kg to 100 of each type. When the time required for 50% of the fiber to break was measured, it was 11 minutes for the fiber of the present invention and 0.4 minutes for the comparative material. Example 2 0.15mmφ consisting of 95% SiO 2 and the remaining amount Be 2 O 3 and F
The fiber was coated with diamond in a thickness of 300 Å to 50 μm using a known plasma CVD method. 100 pieces each, tension span 5m, tension speed 5
Table 1 shows the results of measuring tensile strength in %/mm.
【表】
実施例 ３
0.2mmφのアクリル系プラスチツクフアイバー
に実施例１と同じ方法でダイヤモンド状炭素膜を
第２表に示す厚さに被覆し、各50本づつを60℃、
湿度95％の大気中で２Kgの荷重をかけてその破断
をみるテストと、500mmの直径の円弧状に曲げた
場合の破断を各々200本についてみるテストを行
い比較した結果を第２表に示す。[Table] Example 3 0.2 mmφ acrylic plastic fibers were coated with a diamond-like carbon film to the thickness shown in Table 2 using the same method as in Example 1, and 50 of each were coated at 60°C.
Table 2 shows the comparison results of a test to see if 200 pieces broke under a load of 2 kg in an atmosphere with a humidity of 95%, and a test to see if 200 pieces broke when bent into an arc shape with a diameter of 500 mm. .
【表】
実施例で示した通り本発明の被覆フアイバーは
破断強度が著しく高いことがわかる。
本発明の効果は実施例で示した組成以外の
SiO2系フアイバーに対しても同様の効果を挙げ
ることができた。[Table] As shown in the examples, it can be seen that the coated fibers of the present invention have extremely high breaking strength. The effects of the present invention can be obtained by using compositions other than those shown in the examples.
A similar effect could be achieved for SiO 2 -based fibers.
Claims (1)
を被覆してなる光フアイバー。 ２ ダイヤモンドもしくはダイヤモンド状炭素膜
の厚さが500Å〜30μである特許請求の範囲１記
載の光フアイバー。[Claims] 1. An optical fiber coated with a diamond or diamond-like carbon film. 2. The optical fiber according to claim 1, wherein the diamond or diamond-like carbon film has a thickness of 500 Å to 30 μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57192556A JPS5983107A (en) | 1982-11-04 | 1982-11-04 | Optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57192556A JPS5983107A (en) | 1982-11-04 | 1982-11-04 | Optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5983107A JPS5983107A (en) | 1984-05-14 |
| JPH045964B2 true JPH045964B2 (en) | 1992-02-04 |
Family
ID=16293236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57192556A Granted JPS5983107A (en) | 1982-11-04 | 1982-11-04 | Optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5983107A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235404A (en) * | 1988-07-26 | 1990-02-06 | Fujikura Ltd | Optical fiber |
| JPH02105106A (en) * | 1988-10-14 | 1990-04-17 | Fujikura Ltd | Optical fiber |
| US5024688A (en) * | 1988-11-30 | 1991-06-18 | Fujikura Ltd. | Method for producing carbon-coated optical fiber |
| CA2004234C (en) * | 1988-12-01 | 1994-04-19 | Keiji Oohashi | Optical fiber production method |
| JPH02195304A (en) * | 1989-01-23 | 1990-08-01 | Sumitomo Electric Ind Ltd | Fusion splicing method for optical fiber |
| JPH03107907A (en) * | 1989-09-22 | 1991-05-08 | Hitachi Cable Ltd | Optical fiber |
| JPH03187956A (en) * | 1989-12-18 | 1991-08-15 | Sumitomo Electric Ind Ltd | Carbon-coated fiber |
| US6696157B1 (en) | 2000-03-05 | 2004-02-24 | 3M Innovative Properties Company | Diamond-like glass thin films |
| US6795636B1 (en) | 2000-03-05 | 2004-09-21 | 3M Innovative Properties Company | Radiation-transmissive films on glass articles |
| US7106939B2 (en) * | 2001-09-19 | 2006-09-12 | 3M Innovative Properties Company | Optical and optoelectronic articles |
| JP7386087B2 (en) * | 2020-01-07 | 2023-11-24 | 一般財団法人ファインセラミックスセンター | optical fiber |
-
1982
- 1982-11-04 JP JP57192556A patent/JPS5983107A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5983107A (en) | 1984-05-14 |
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