JPH02186310A - Coated optical fiber - Google Patents
Coated optical fiberInfo
- Publication number
- JPH02186310A JPH02186310A JP1005542A JP554289A JPH02186310A JP H02186310 A JPH02186310 A JP H02186310A JP 1005542 A JP1005542 A JP 1005542A JP 554289 A JP554289 A JP 554289A JP H02186310 A JPH02186310 A JP H02186310A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- coated optical
- light
- layer
- coloring layer
- 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 31
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 5
- 238000004040 coloring Methods 0.000 abstract description 8
- 229920005989 resin Polymers 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 239000010453 quartz Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 abstract description 2
- 238000003848 UV Light-Curing Methods 0.000 abstract 2
- 238000001723 curing Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 16
- 238000005452 bending Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 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
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、着色層を有する光ファイバ心線に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a coated optical fiber having a colored layer.
近年、光ファイバを用いた通信システムが広く普及して
いる。ところで、光ファイバを加入者通信網に適用する
場合、−度布設した光ファイバケーブルを客先の要求に
応じて切り替える時などには、各光ファイバ心線の心線
対照が必要になる。In recent years, communication systems using optical fibers have become widespread. By the way, when applying optical fibers to subscriber communication networks, it is necessary to compare each optical fiber core when switching optical fiber cables that have been installed several times in response to a customer's request.
このため前記心線対照等を目的として光ファイバ心線の
被覆を介して、心線の側方から光（例えば１．３μｍ、
１．５５μ−等の波長の光）を入射（Ｌｌ：ローカルイ
ンジェクシ叩ン）及び受光（ＬＤ： ローカルディテク
シ四ン）して心線識別等を行うシステムが求められるよ
うになってきている。Therefore, for the purpose of comparing the optical fibers, light (for example, 1.3 μm,
There is a growing demand for a system that performs core fiber identification by inputting (Ll: local injection) and receiving (LD: local detection) light (with a wavelength of 1.55μ, etc.). .
上記の要求に対して、光ファイバに自然色、すなわち光
が透過する樹脂のみ被覆した場合はなんら問題はないが
、通常、光ケーブルに使用する光ファイバ心線の場合に
は、各心線を識別する目的で着色層が施される。またこ
の着色層を形成する着色インキとしては、生産効率等の
理由から紫外線硬化型着色インキが一般的で、このよう
な紫外線硬化型着色インキを使用した着色層付き光ファ
イバ心線の場合、光が十分にこの着色層を透過せず、Ｌ
ｌやＬＤができないという問題があった。In response to the above requirements, there is no problem if the optical fiber is coated with a natural color, that is, only a resin that transmits light.However, in the case of optical fiber cores used for optical cables, each core wire is usually A colored layer is applied for the purpose of Furthermore, as the colored ink for forming this colored layer, ultraviolet ray curing colored ink is generally used for reasons such as production efficiency. does not pass through this colored layer sufficiently, and L
There was a problem that L and LD were not possible.
前記問題に鑑み本発明の目的は、着色層付きの光ファイ
バ心線であっても、前記着色層をＬｌ、［，１］用の光
が十分に透過する光ファイバ心線を従供することにある
。In view of the above problems, an object of the present invention is to provide an optical fiber coated wire that allows light for Ll, [, 1] to sufficiently pass through the colored layer, even if the coated optical fiber has a colored layer. be.
前記目的を達成すべく本発明は、着色層を有する光ファ
イバ心線において、前記着色層は酸化チタンの含有量が
５重量％以下である紫外線硬化型アクリレートから成る
ことを特徴とするものである。In order to achieve the above object, the present invention provides a coated optical fiber having a colored layer, wherein the colored layer is made of ultraviolet curable acrylate having a titanium oxide content of 5% by weight or less. .
以下に本発明の実施例を図面を参照して詳細に説明する
０本発明者は着色層を形成する紫外線硬化型着色インキ
の組成を検討し、着色インキ中に含まれていて、白色を
発現しかつ各種の色の調色剤としても使用されている酸
化チタン（ＴｉＯｇ）が光の透過を妨げる原因であるこ
とを突き止めた。Embodiments of the present invention will be described below in detail with reference to the drawings. The present inventor studied the composition of the ultraviolet curable colored ink that forms the colored layer, and found that the composition of the ultraviolet curable colored ink that is contained in the colored ink and that produces white color. It was also discovered that titanium oxide (TiOg), which is also used as a toning agent for various colors, was the cause of the obstruction to light transmission.
そこで次にこの酸化チタンの含有量をどの程度にしたら
光の透過を妨げないようにできるかを検討ずべく、酸化
チタンの含有量とＬｌ特性との関係を調査した。以下に
その実験例を示す。Next, we investigated the relationship between the titanium oxide content and the Ll characteristics in order to examine how much titanium oxide should be contained so as not to impede the transmission of light. An experimental example is shown below.
第１図に示すように外径１２５ ａｙｓ 、モードフィ
ールド径９．２μ鱈、カットオフ波長１．２３μ履の石
英系光ファイバ１の外側に、光を透過する自然色の紫外
線硬化型樹脂からなる内Ｎ被覆２、外層被覆３をそれぞ
れ設は外径２４０μ鋼とし、最外層に線速４００ｍ／分
で紫外線硬化型の着色材を塗布し、これに１．２０ｗ／
Ｃｍのメタルハライドランプを２灯有する紫外線照射装
置により紫外線を照射して硬化せしめ、厚さ５μ調の着
色Ｊ！５４を有する光ファイバ心線５を得た。この着色
Ｎ４の材料は紫外線硬化型アクリレートに酸化チタンを
表−１に示す容量を含有している。As shown in Figure 1, the outside of a quartz-based optical fiber 1 with an outer diameter of 125 ays, a mode field diameter of 9.2 μm, and a cutoff wavelength of 1.23 μm is made of a natural-colored ultraviolet curable resin that transmits light. The inner N coating 2 and the outer coating 3 are made of steel with an outer diameter of 240 μm, and an ultraviolet curing coloring material is applied to the outermost layer at a linear speed of 400 m/min.
A UV irradiation device with two Cm metal halide lamps is used to irradiate ultraviolet rays to harden the product, resulting in a 5μ thick colored J! An optical fiber core 5 having a diameter of 54 was obtained. This colored N4 material contains titanium oxide in ultraviolet curable acrylate in the capacity shown in Table 1.
表−１
ＴｉＯ＊含有！含有量％）０２５７１０１５Ｌｌ特性（
結合損失ｄＢ）−４１−４２−４３−４８−５３−５６
判 定 Ｏｏ Ｏ× × ×上
記に示すように、酸化チタンの含有量を５重量％以下に
すると問題なくＬｌを行うことが可能となる。ここで判
定は、通常ＬＩ＋ＬＤが一６５ｄＢ以下、そしてＬｌが
一４５ｄＢ 、 ＬＤが一２０ｄＢ以下であれば良好で
あるとする基準に準拠し、かつ一般にＬｌＯ方が目標達
成が困難であって、これが達成されればＬＤの達成は容
易であると言われていることから、今回の測定はＬＩの
みとし、Ｌｌが一４５ｄＢ以下であるものを０１それ以
上のものを×とした。Table-1 Contains TiO*! Content%) 02571015Ll Characteristics (
Coupling loss dB) -41-42-43-48-53-56
Judgment Oo O×××As shown above, when the content of titanium oxide is 5% by weight or less, Ll can be performed without problems. The judgment here is normally based on the standard that it is good if LI + LD is 165 dB or less, Ll is 45 dB or less, and LD is 120 dB or less. Since it is said that it is easy to achieve LD if it is achieved, this time the measurement was made only for LI, and those with Ll of -45 dB or less were marked as 01, and those with Ll of 45 dB or less were marked as ×.
またＬ！特性は第２図に示すように波長１．５５μ−の
光源６から出る光を、前記表−１に示す各着色層４を有
する各光ファイバ心線５に曲げ治具７を図示のように押
し当て、曲げ半径７ｍｓに曲げた部分を設けて、該部分
から前記光を入射せしめ、これを光ファイバ心線５の端
面に接続したパワーメータ９により受光し、その受光量
、すなわち透過量を測定したものである。L again! As shown in Fig. 2, the light emitted from the light source 6 with a wavelength of 1.55μ is applied to each optical fiber core 5 having each colored layer 4 shown in Table 1 above using a bending jig 7 as shown in the figure. A part is pressed and bent to a bending radius of 7 ms, and the light is made to enter from this part, and is received by a power meter 9 connected to the end face of the optical fiber core 5, and the amount of received light, that is, the amount of transmission is measured. This is what was measured.
前記実施例では光ファイバ心線５は、いわゆる単心型の
ものであうだが、このようにして得た光ファイバ心ｖＡ
５を第３図の示すように複数本並列に並べ、これに紫外
線硬化型樹脂等からなる一括被覆８を施してテープ心線
１５としてもよい、また他の被覆層が光を透過するもの
であれば、着色層４の位置は光ファイバ心線５の最外層
に限定されるものではなく、内層部分にこの着色層４を
設けてもよい。In the above embodiment, the optical fiber core 5 is of a so-called single-core type, but the optical fiber core vA obtained in this way is
5 may be arranged in parallel as shown in FIG. 3 and coated with UV-curable resin or the like 8 to form the tape core wire 15, or the other coating layer may be one that transmits light. If there is, the position of the colored layer 4 is not limited to the outermost layer of the optical fiber core 5, and the colored layer 4 may be provided in the inner layer portion.
また前記実施例では着色Ｎ４以外の被覆層、具体的には
内Ｎ被覆２及び外層被Ｊ１！３は自然色の、すなわち光
を透過する紫外線硬化型樹脂を使用しているが、光を透
過するものであれば他の樹脂、例えば熱硬化型の樹脂等
も使用できることはいうまでもない。In addition, in the above embodiment, the coating layers other than the colored N4, specifically, the inner N coating 2 and the outer coating J1!3, are made of natural-colored ultraviolet curable resin that transmits light. It goes without saying that other resins, such as thermosetting resins, can also be used as long as they can be used.
前述の如く本発明によれば、着色層を有していてもＬｌ
、 ＬＤが可能な光ファイバ心線を得ることができる。As described above, according to the present invention, even if it has a colored layer, Ll
, an optical fiber core capable of LD can be obtained.
第１図は本発明に係わる光ファイバ心線の横断面図、第
２図は光ファイバ心線のＬｌ特性を測定する方法を示す
概略図、第３図は本発明を応用したテープ型の光ファイ
バ心線の横断面図である。
１〜光ファイバ ４〜着色Ｎ ５〜光ファイバ心線 ６
〜光ｉ！Ｉ［７〜曲げ治ＩＡ ９〜パワーメータFig. 1 is a cross-sectional view of a coated optical fiber according to the present invention, Fig. 2 is a schematic diagram showing a method for measuring Ll characteristics of a coated optical fiber, and Fig. 3 is a tape-shaped optical fiber to which the present invention is applied. FIG. 3 is a cross-sectional view of a fiber core. 1 - Optical fiber 4 - Colored N 5 - Optical fiber core 6
~Hikari i! I[7~Bending IA 9~Power meter
Claims (1)
酸化チタンの含有量が５重量％以下である紫外線硬化型
アクリレートから成ることを特徴とする光ファイバ心線
。1. An optical fiber coated wire having a colored layer, wherein the colored layer is made of ultraviolet curable acrylate having a titanium oxide content of 5% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005542A JPH02186310A (en) | 1989-01-12 | 1989-01-12 | Coated optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005542A JPH02186310A (en) | 1989-01-12 | 1989-01-12 | Coated optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02186310A true JPH02186310A (en) | 1990-07-20 |
Family
ID=11614080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1005542A Pending JPH02186310A (en) | 1989-01-12 | 1989-01-12 | Coated optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02186310A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005070332A (en) * | 2003-08-22 | 2005-03-17 | Fujikura Ltd | Coated optical fiber, coated optical fiber tape, and discrimination method of coated optical fiber |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6370210A (en) * | 1986-09-12 | 1988-03-30 | Hitachi Cable Ltd | Coated optical fiber |
-
1989
- 1989-01-12 JP JP1005542A patent/JPH02186310A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6370210A (en) * | 1986-09-12 | 1988-03-30 | Hitachi Cable Ltd | Coated optical fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005070332A (en) * | 2003-08-22 | 2005-03-17 | Fujikura Ltd | Coated optical fiber, coated optical fiber tape, and discrimination method of coated optical fiber |
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