JPH01304408A - Optical fiber cable - Google Patents
Optical fiber cableInfo
- Publication number
- JPH01304408A JPH01304408A JP63136198A JP13619888A JPH01304408A JP H01304408 A JPH01304408 A JP H01304408A JP 63136198 A JP63136198 A JP 63136198A JP 13619888 A JP13619888 A JP 13619888A JP H01304408 A JPH01304408 A JP H01304408A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- coating
- core
- fiber cable
- cable
- 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
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 11
- 239000001257 hydrogen Substances 0.000 abstract description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 10
- 229920005989 resin Polymers 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011253 protective coating Substances 0.000 abstract description 5
- 229910003481 amorphous carbon Inorganic materials 0.000 abstract description 2
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 2
- 238000003848 UV Light-Curing Methods 0.000 abstract 2
- 229910020286 SiOxNy Inorganic materials 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005253 cladding Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002650 laminated plastic Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004078 waterproofing 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44382—Means specially adapted for strengthening or protecting the cables the means comprising hydrogen absorbing materials
-
- 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
- G02B6/441—Optical cables built up from sub-bundles
-
- 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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
Abstract
Description
【発明の詳細な説明】
〔技（ネｉ分野〕
本発明は、光ファイバケーブルの改良に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to improvements in optical fiber cables.
〔従来技術）
今日、広範な通信分野で光ファイバケーブルが使用され
るようになってきている。ところでその利用分野が広が
ると共に、光ファイバケーブルに求められる要求もより
高いものになってきている。[Prior Art] Today, optical fiber cables are being used in a wide variety of communications fields. However, as the field of use for optical fiber cables expands, the demands placed on optical fiber cables are also becoming higher.
具体的にはより高強度で、しかもより細径で、加えて光
ファイバケーブルで度々問題とされるところの耐水素特
性、すなわち水素による伝送損失増加の少ないものが希
求されるようになってきている。Specifically, there is a growing demand for higher strength, smaller diameter, and hydrogen resistance, which is often a problem with optical fiber cables, in other words, a cable with less increase in transmission loss due to hydrogen. There is.
いまその−例として前記機械的強度について言及すると
、光ファイバは通常言われているように、機械的強度は
極めて弱く、そのため光ファイバケーブルには必ず鋼線
や繊維強化プラスチックロンド等からなる抗張力体をそ
の中心あるいは周囲に配している。その結果、光ファイ
バケーブルは従来の銅導体ケーブルに比較してケーブル
外径を小さくでき、かつ軽量にできると言われているも
のの、前述のように抗張力体を使用した結果、実際はあ
まりケーブル外径を細くできない、また軽量にもできな
い等の問題があった。Now, referring to the mechanical strength mentioned above as an example, as is commonly said, the mechanical strength of optical fiber is extremely weak, so optical fiber cables always include a tensile strength material made of steel wire or fiber-reinforced plastic iron. are placed in the center or around it. As a result, although it is said that optical fiber cables can be made smaller in outer diameter and lighter in weight than conventional copper conductor cables, as a result of using tensile strength members as mentioned above, in reality the outer diameter of the cable is smaller. There were problems such as not being able to make it thin or lightweight.
〔発明の目的］
前記問題に鑑み本発明の目的は、機械的強度を損なうこ
となくケーブルの細径化、軽量化が図れ、しかも耐水素
特性にも優れた光ファイバケーブルを提供することにあ
る。[Object of the Invention] In view of the above problems, an object of the present invention is to provide an optical fiber cable that can be made smaller in diameter and lighter in weight without compromising mechanical strength, and also has excellent hydrogen resistance properties. .
前記目的を達成すべく本発明は、例えば石英ガラス製の
コアおよびクラッドからなる光ファイバの外側に適当な
被覆を施してなる光ファイバ心線を複数本集合したコア
と、該コアの外方に施してなるシースとを有する光ファ
イバケーブルにおいて、前記光ファイバ心線はハーメチ
ック被覆を有していることを特徴とするものである。In order to achieve the above-mentioned object, the present invention comprises a core made up of a plurality of optical fibers each having a core made of quartz glass and a cladding coated with an appropriate coating on the outside, In the optical fiber cable, the optical fiber has a hermetic sheath.
〔発明の実施例） 以下に本発明の実施例を図を参照して詳細に説明する。[Embodiments of the invention] Embodiments of the present invention will be described in detail below with reference to the drawings.
本発明者は種々の検討の結果、光ファイバケーブルを製
造するに際して、光ファイバ心線６として第１図に示す
ようなハーメチック被覆４を有する心線を使用すると、
機械的強度が格段に向上し、しかもこのハーメチック被
覆４が水素に対する遮蔽層となって耐水素特性が向上す
ることを見出した。いま第１図によりこの光ファイバ心
線６の一実施例を説明する。これは石英ガラス製のコア
１およびクラッド２および必要に応じてこのクラッド２
上に石英ガラス製のジャケット層を設けた光ファイバ３
上に、例えばＳ＋０ｘＮｙ（オキシナイトライドガラス
）あるいはアモルファスカーボン等から成る、いわゆる
ハーメチック被覆４を被覆せしめ、しかる後常法により
保護被覆５を施したものである。尚、この保護被覆５は
熱硬化性樹脂、紫外線硬化性樹脂、熱可塑性樹脂等で１
層にて形成される場合もあるし、多層で形成される場合
もあり、多層で形成される場合は前記各樹脂による層を
適当に組み合わせることも度々行われている。例えばま
ず熱硬化性樹脂で内層を形成し、この上に外層として紫
外線硬化性樹脂被覆を施したり、内層も外層も紫外線硬
化性樹脂で形成したりする。As a result of various studies, the present inventor found that when manufacturing an optical fiber cable, if a core wire having a hermetic coating 4 as shown in FIG. 1 is used as the optical fiber core wire 6,
It has been found that the mechanical strength is significantly improved, and that the hermetic coating 4 acts as a shielding layer against hydrogen, thereby improving hydrogen resistance. One embodiment of this optical fiber core 6 will now be described with reference to FIG. This consists of a core 1 and a cladding 2 made of quartz glass, and this cladding 2 as required.
Optical fiber 3 with a jacket layer made of quartz glass provided on top
A so-called hermetic coating 4 made of, for example, S+0xNy (oxynitride glass) or amorphous carbon is coated thereon, and then a protective coating 5 is applied by a conventional method. Note that this protective coating 5 is made of thermosetting resin, ultraviolet curable resin, thermoplastic resin, etc.
It may be formed in layers, or it may be formed in multilayers, and when it is formed in multilayers, the layers of each of the resins mentioned above are often combined appropriately. For example, an inner layer is first formed of a thermosetting resin, and then an ultraviolet curable resin coating is applied thereon as an outer layer, or both the inner layer and the outer layer are formed of an ultraviolet curable resin.
このような光ファイバ心線６を使用すると、例えば第２
図に示すように、従来のごとく抗張力体を使用すること
なしに光ファイバケーブルを形成できる。すなわち、第
２図に示すものは、光ファイバ心線６を複数本集合して
コアを形成し、これに必要に応じてプラスチックテープ
等からなる押巻層７、ポリエチレンあるいはポリ塩化ビ
ニル等からなるプラスチック製のシース、あるいは金属
−プラスチンクラミ７−トシース８を順次族したもので
ある。もちろん必要に応じて抗張力体を使用してもよい
が、その場合、従来のものと異なり光ファイバ心線６の
強度が格段に向上しているため、前記抗張力体の外径を
極めて細くできるという利点がある。When such optical fiber core 6 is used, for example, the second
As shown in the figure, an optical fiber cable can be formed without using conventional tensile strength members. That is, in the case shown in FIG. 2, a plurality of optical fiber cores 6 are assembled to form a core, and if necessary, a wrapping layer 7 made of plastic tape or the like, or a rolled layer 7 made of polyethylene or polyvinyl chloride, etc. A plastic sheath or a metal-plastic sheath 7 and a sheath 8 are sequentially arranged. Of course, a tensile strength member may be used if necessary, but in that case, unlike conventional ones, the strength of the optical fiber core 6 is significantly improved, so the outer diameter of the tensile strength member can be made extremely thin. There are advantages.
また第３図のように自己支持型光ファイバケーブルにこ
のハーメチック被覆４付の光ファイバ心線６を採用する
と、以下に述べる利点がある。すなわち、従来この種の
光ファイバケーブルでは、架空布設され支持線９が伸び
ると、この伸びがシース８を伝わって光ファイバ心線６
へと伝わり、光ファイバ心線６の伝送損失増加を誘起し
ていた。Further, when the optical fiber core 6 with the hermetic coating 4 is employed in a self-supporting optical fiber cable as shown in FIG. 3, there are the following advantages. That is, in conventional optical fiber cables of this kind, when the support wire 9 is stretched overhead, this stretch is transmitted through the sheath 8 and the optical fiber core wire 6
This causes an increase in the transmission loss of the optical fiber 6.
そこでこれを防止すべく予めコアを形成する光ファイバ
心線６に余長を持たせることが必須条件となり、種々の
製法が提案されている。しかしながらいづれの方法もそ
の条件が難しく、ケーブル長手方向に均一に余長を入れ
ることは実際問題として困難であった。これに対してコ
アを形成する光ファイバ心線６として本願のようにハー
メチック被覆４を有し、機械的強度に優れた光ファイバ
心線６を使用すると、心線６自体に充分な機械的強度が
備わっているため、特別に難しい製法を採用することな
く自己支持型光ファイバケーブルを製造することができ
る。すなわち容易に製造できるという利点がある。Therefore, in order to prevent this, it is essential to provide an extra length to the optical fiber core 6 that forms the core in advance, and various manufacturing methods have been proposed. However, the conditions for each method are difficult, and it is actually difficult to add extra length uniformly in the longitudinal direction of the cable. On the other hand, if a coated optical fiber 6 having a hermetic coating 4 and excellent mechanical strength is used as the coated optical fiber 6 forming the core as in the present application, the coated coated fiber 6 itself has sufficient mechanical strength. This makes it possible to manufacture self-supporting optical fiber cables without using particularly difficult manufacturing methods. That is, it has the advantage of being easily manufactured.
また前記光ファイバ心線６の他の構造として、ハーメチ
ック被覆４あるいは必要に応じて該ハーメチック被覆４
上に適当な被覆を施した光ファイバ心線１０を複数本用
意し、これを第４図のように平面状に並行に並べ、これ
に紫外線硬化性樹脂、熱硬化性樹脂あるいは熱可塑性樹
脂等からなる一括被覆９を施して形成した、いわゆるテ
ープ型の光ファイバ心線６とすることもできる。In addition, as another structure of the optical fiber core 6, the hermetic coating 4 or the hermetic coating 4 as necessary may be used.
Prepare a plurality of coated optical fibers 10 with a suitable coating on top, arrange them in parallel in a plane as shown in FIG. It is also possible to form a so-called tape-shaped optical fiber core 6 formed by applying a collective coating 9 consisting of the following.
以下に本願の具体的実施例を示す。Specific examples of the present application are shown below.
（実施例１）
石英ガラス製のコアｌ及びクラッド２上に約１μｍの厚
さでＳｉＯＸ Ｎ ｙからなるハーメチック被覆４を被
覆せしめ、これに紫外線硬化製樹脂を塗布硬化せしめて
外径２５０７Ｉｎ＋の光コア・イバ心線６を形成した。(Example 1) A hermetic coating 4 made of SiOXNy with a thickness of about 1 μm is coated on the core l and cladding 2 made of quartz glass, and an ultraviolet curing resin is applied and cured to coat it with light having an outer diameter of 2507 In+. A core fiber core wire 6 was formed.
次にこの心線６を抗張力体を含むことなく １ｏｏｏ心
集合しコアを形成した後、プラスチックテープからなる
押巻層７１．アルミニウムテープ−プラスチックラミネ
ートシース８を順次施し外径１３ｍｍの光ファイバケー
ブルを得ることができた。Next, this core wire 6 is assembled into 100 cores without including a tensile strength member to form a core, and then a rolled layer 71 made of plastic tape is formed. By sequentially applying the aluminum tape-plastic laminate sheath 8, an optical fiber cable with an outer diameter of 13 mm could be obtained.
この光ファイバケーブルでは、抗張力体を使用していな
いため、曲げ特性に優れ、かつ外径が従来に比して細く
なっており、また同時に少なくとも抗張力体骨は軽量に
なっている。加えて前記ハーメチック被覆４があるため
外部から光ファイバ３への水素の侵入は防止され、長期
にわたって水素による伝送損失増加を防止できる。当然
のことながら従来のように水素侵入防止、換言すると外
部からの水分の侵入防止用として使用していた防水混和
物や吸水材料等も不要となり、この点からもケーブルの
製造が容易になる。Since this optical fiber cable does not use a tensile strength member, it has excellent bending properties and has a thinner outer diameter than conventional cables, and at the same time, at least the tensile strength member is lightweight. In addition, the presence of the hermetic coating 4 prevents hydrogen from entering the optical fiber 3 from the outside, making it possible to prevent an increase in transmission loss due to hydrogen over a long period of time. Naturally, there is no need for waterproofing admixtures or water-absorbing materials, which were conventionally used to prevent hydrogen intrusion, or in other words, to prevent moisture intrusion from the outside, and from this point of view as well, manufacturing of the cable becomes easier.
前述の如く本発明によれば、光ファイバケーブルの細径
化、軽量化及び耐水素特性の向上が図れると共に、ケー
ブル自体の製造も容易になる。As described above, according to the present invention, an optical fiber cable can be made smaller in diameter, lighter in weight, and improved in hydrogen resistance, and the cable itself can be manufactured easily.
第１回は本発明に使用する光ファイバ心線の一実施例を
示す横断面図、第２図、第３図は本発明の光ファイバケ
ーブルの一実施例及び他の実施例を示す横断面図、第４
図は零発゛明に使用する光ファイバ心線の他の例を示す
横断面図である。
３〜光ファイバ ４〜ハーメチンク被覆 ５〜保護被覆
６〜光ファイバ心線 ９〜支持線特許出願人 古
河電気工業株式会社第１図
９支持線
第４図Part 1 is a cross-sectional view showing one embodiment of the optical fiber cable used in the present invention, and Figures 2 and 3 are cross-sectional views showing one embodiment and other embodiments of the optical fiber cable of the present invention. Figure, 4th
The figure is a cross-sectional view showing another example of a coated optical fiber used for zero-starting. 3-Optical fiber 4-Hermetink coating 5-Protective coating 6-Optical fiber core 9-Support wire Patent applicant Furukawa Electric Co., Ltd. Fig. 1 9 Support line Fig. 4
Claims (2)
該コアの外方に施してなるシースとを有する光ファイバ
ケーブルにおいて、前記光ファイバ心線はハーメチック
被覆を有していることを特徴とする光ファイバケーブル
。(1) A core made up of a collection of multiple optical fibers,
An optical fiber cable having a sheath formed on the outside of the core, wherein the optical fiber core wire has a hermetic coating.
する請求項１記載の光ファイバケーブル。(2) The optical fiber cable according to claim 1, wherein the core does not have a tensile strength member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63136198A JPH01304408A (en) | 1988-06-02 | 1988-06-02 | Optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63136198A JPH01304408A (en) | 1988-06-02 | 1988-06-02 | Optical fiber cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01304408A true JPH01304408A (en) | 1989-12-08 |
Family
ID=15169634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63136198A Pending JPH01304408A (en) | 1988-06-02 | 1988-06-02 | Optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01304408A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0703479A1 (en) * | 1994-09-23 | 1996-03-27 | Alcatel Cable | Fibre optical cable |
| WO2009063369A1 (en) | 2007-11-12 | 2009-05-22 | Schlumberger Canada Limited | Down-hole monitoring cable with hydrogen absorbing layer |
| WO2009060411A3 (en) * | 2007-11-09 | 2009-08-13 | Schlumberger Ca Ltd | Hydrocarbon monitoring cable |
-
1988
- 1988-06-02 JP JP63136198A patent/JPH01304408A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0703479A1 (en) * | 1994-09-23 | 1996-03-27 | Alcatel Cable | Fibre optical cable |
| FR2725041A1 (en) * | 1994-09-23 | 1996-03-29 | Alcatel Cable | OPTICAL FIBER CABLE |
| US5703984A (en) * | 1994-09-23 | 1997-12-30 | Alcatel Cable | Optical fiber cable with plural modular bundles of hermtically sealed optical fibers inside an outer cable sheath |
| WO2009060411A3 (en) * | 2007-11-09 | 2009-08-13 | Schlumberger Ca Ltd | Hydrocarbon monitoring cable |
| WO2009063369A1 (en) | 2007-11-12 | 2009-05-22 | Schlumberger Canada Limited | Down-hole monitoring cable with hydrogen absorbing layer |
| US7769251B2 (en) | 2007-11-12 | 2010-08-03 | Schlumberger Technology Corporation | Hydrocarbon monitoring cable with an absorbing layer |
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