JPS62245208A - Method for preventing generation of hydrogen in coated optical fiber - Google Patents
Method for preventing generation of hydrogen in coated optical fiberInfo
- Publication number
- JPS62245208A JPS62245208A JP61088122A JP8812286A JPS62245208A JP S62245208 A JPS62245208 A JP S62245208A JP 61088122 A JP61088122 A JP 61088122A JP 8812286 A JP8812286 A JP 8812286A JP S62245208 A JPS62245208 A JP S62245208A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- hydrogen
- coated
- curable resin
- coated optical
- 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 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000001257 hydrogen Substances 0.000 title claims abstract description 25
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 13
- 239000011347 resin Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000002023 wood Substances 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、光ファイバの伝送損失を誘導する水素の発生
を防止する被覆光ファイバの水素発生防止方法の改良に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for preventing hydrogen generation in a coated optical fiber, which prevents the generation of hydrogen that induces transmission loss in an optical fiber.
（従来技術）
石英ガラスから成る光ファイバは元来極めて傷付き易い
ので外傷から保護するため、また外力によって光フテイ
バがマイクロベンドを生じて伝送損失が増加するのを防
止するために紡糸後直ちに樹脂を被覆している。従来か
らこの樹脂としてウレタンアクリレート、エポキシアク
リレート、ブタジェンアクリレート等の紫外線硬化性樹
脂が用いられている。しかし、この紫外線硬化性樹脂は
長期間使用している間に僅かであるが水素を発生し、こ
の水素が光ファイバ中に拡散すると、水素分子の吸収に
よると考えられる１ｏ２４μｍの波長帯と５ｉｎ）（の
吸収によると考えられる１、３９ｐｍの波長帯及びＧｅ
ＯＨの吸収によると考えられる１ 、４１ｇｍの波長帯
にそれぞれ大きな吸収が生じ９通信に用いられる１、３
０〜１．５５ｐｍの波長帯で伝送損失が増大する欠点が
あった。(Prior art) Optical fibers made of quartz glass are inherently extremely susceptible to damage, so they are coated with resin immediately after spinning in order to protect them from external damage and to prevent the optical fibers from forming micro-bends due to external forces and increasing transmission loss. is covered. Conventionally, ultraviolet curable resins such as urethane acrylate, epoxy acrylate, and butadiene acrylate have been used as this resin. However, this ultraviolet curable resin generates a small amount of hydrogen during long-term use, and when this hydrogen diffuses into the optical fiber, it is thought to be due to absorption of hydrogen molecules. (1,39 pm wavelength band thought to be due to absorption of Ge
This is thought to be due to the absorption of OH, and large absorption occurs in the wavelength band of 1 and 41 gm, respectively, which are used for communication.
There was a drawback that transmission loss increased in the wavelength band of 0 to 1.55 pm.
（発明の目的）
本発明の目的は、紫外線硬化性樹脂から水素の発生を有
効に防１ヒすることができる被覆光ファイバの水素発生
防止方法を提供することにある。(Object of the Invention) An object of the present invention is to provide a method for preventing hydrogen generation in a coated optical fiber, which can effectively prevent hydrogen generation from an ultraviolet curable resin.
（発明の構成）
本発明に係る被覆光ファイバの水素発生防止方法は１石
英ガラスの光ファイバ外周上に少なくとも１層以との紫
外線硬化性樹脂を被覆してなる光ファイバ芯線またはこ
の光ファイバ芯線を複数本撚合せてその上に紫外線硬化
性樹脂を被覆してなる光ファイバユニットの紫外線硬化
性樹脂に加湿処理を施すことを特徴としているこのよう
にすると、紫外線硬化性樹脂から水素が発生するのを有
効に防市することができるので使用波長帯での伝送損失
を低下することができる。(Structure of the Invention) The method for preventing hydrogen generation in a coated optical fiber according to the present invention is as follows: 1. An optical fiber core wire formed by coating at least one layer of ultraviolet curable resin on the outer periphery of a quartz glass optical fiber, or this optical fiber core wire. It is characterized by applying humidification treatment to the UV-curable resin of the optical fiber unit, which is made by twisting multiple fibers together and coating the fibers with UV-curable resin.When doing this, hydrogen is generated from the UV-curable resin. Since the transmission loss can be effectively prevented, the transmission loss in the used wavelength band can be reduced.
（実施例）
本発明の実施例を図面を参照して詳細に説明すると、第
１図及び第２図は本発明の方法が施される被覆光ファイ
バを示し、第１図の被覆光ファイバＩＯＡは石英ガラス
製の光ファイバ１２に軟質の紫外線硬化性樹脂１４と硬
質の紫外線硬化性樹脂１６とナイロン被ｍｔａとが施さ
れた光ファイバ芯線２０から成り、また第２図の被覆光
ファイバＩＯＢは第１図の光ファイバ芯線１０Ａの複数
本を銅メー２キした鋼線２２と共に撚合せた撚合せ体に
紫外線硬化性樹脂２４を施した光ファイバユニット２６
から成っている。(Example) An example of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a coated optical fiber to which the method of the present invention is applied, and the coated optical fiber IOA of FIG. The coated optical fiber IOB shown in FIG. An optical fiber unit 26 in which a plurality of optical fiber core wires 10A shown in FIG. 1 are twisted together with a copper-plated steel wire 22 and an ultraviolet curing resin 24 is applied to the twisted body.
It consists of
本発明の水素発生防止方法は、この光ファイバ芯線２０
または光ファイバユニット２６の紫外線硬化性樹脂１４
．１６．２４に加湿処理を施すことにある０本発明者等
は幾多の実験の結果紫外線硬化性樹脂にこのように加湿
処理を施すと、未吸湿の紫外線硬化性樹脂に比べて水素
発生量が著しく少なくなることを見出した。尚、このよ
うに加湿処理した後に乾燥すると、更に水素発生量が少
なくなることも見出された。The hydrogen generation prevention method of the present invention is based on this optical fiber core wire 20.
Or the ultraviolet curable resin 14 of the optical fiber unit 26
．． 16.24 The present inventors have conducted numerous experiments and found that when UV curable resin is subjected to humidification treatment in this way, the amount of hydrogen generated is lower than that of UV curable resin that has not absorbed moisture. I found that it was significantly less. It has also been found that the amount of hydrogen generated is further reduced when the material is dried after the humidification treatment.
次に本発明の処理が施された被覆光ファイバと無処理の
被覆光ファイバとについて水素発生量を比較する実験を
行なった結果をのべる。外径１２５ＪＬｍの光ファイバ
上に外径０ 、４ｍｍとなるように紫外線硬化性樹脂を
被覆し、更にそのＬに外径０．６ｍｍのナイロン被覆を
施した６木の光ファイバ芯線を外径０．５ｍｍの銅メツ
キ鋼線の周囲に撚合せ、その外周に紫外線硬化性樹脂を
被覆して第２図に示す如き光ファイバユニット（以後単
にユニットと称する）を形成した。このユニットを製作
後直ちに温度２３℃、湿度６５％の室内に７日間保管し
たもの（無処理ユニットＡと称する）とユニットを製作
後直ちに２３℃の水中に２日間浸漬して加湿処理したも
の（加湿処理ユニットＢと称する）及びこの加湿処理ユ
ニットを更にシリカゲルデシケータ−中で７日間乾燥し
たもの（乾燥ユニットＣと称する）とを用意した０次い
で、これらを圧力１５０ｍｍＨＨの窒素雰囲気下１００
℃の温度で水素ガス発生量を測定した結果を第３図に示
しである。水素の発生は１２時時間間でほぼ飽和し、飽
和水素発生量は無処理ユニットＡではｌａｍ当り０．０
２５１Ｌｌであったが、加湿処理ユニッ）Ｂでは１ｃｍ
当り０．０１７ｐｌであった。また、乾燥ユニツ）Ｃで
は１ｃｍ当り０．０１６ＩＬｌであり、加湿処理後乾燥
しても加湿処理の効果が損なわれることがなかった。Next, the results of an experiment comparing the amount of hydrogen generated between a coated optical fiber treated according to the present invention and an untreated coated optical fiber will be described. An optical fiber with an outer diameter of 125 JLm is coated with an ultraviolet curable resin so that the outer diameter is 0.4 mm, and a 6-wood optical fiber core wire with an outer diameter of 0.6 mm is coated with a nylon coated on the L. The fibers were twisted around a .5 mm copper-plated steel wire, and the outer periphery thereof was coated with an ultraviolet curable resin to form an optical fiber unit as shown in FIG. 2 (hereinafter simply referred to as the unit). One unit was stored in a room at 23°C and 65% humidity for 7 days immediately after manufacturing (referred to as untreated unit A), and the other was humidified by being immersed in water at 23°C for 2 days immediately after manufacturing (referred to as untreated unit A). A humidifying unit (referred to as a humidifying unit B) and a unit further dried in a silica gel desiccator for 7 days (referred to as a drying unit C) were prepared.
FIG. 3 shows the results of measuring the amount of hydrogen gas generated at a temperature of .degree. Hydrogen generation is almost saturated in 12 hours, and the saturated hydrogen generation amount is 0.0 per lam in untreated unit A.
It was 251Ll, but it was 1cm in humidification processing unit) B.
It was 0.017 pl per unit. In addition, in dry unit) C, it was 0.016 ILl per 1 cm, and the effect of the humidification treatment was not impaired even if it was dried after the humidification treatment.
第４図は光ファイバユニットを構成する紫外線硬化性樹
脂の含水率と飽和水素発生量との関係を示し、この図か
ら含水率が高い程水素発生品が少ないことが解る。加湿
処理は相対湿度８０％以との雰囲気中に晒すかまたは水
中に浸漬して行なわれるが、この場合加湿処理の雰囲気
の温度または水温が高い程効果が高まる。特にこの温度
はまたは水温４０℃以上であるとその効果が著しく高ま
ることが確認された。また。FIG. 4 shows the relationship between the water content of the ultraviolet curable resin constituting the optical fiber unit and the amount of saturated hydrogen generated. It can be seen from this figure that the higher the water content, the less hydrogen generated. Humidification treatment is carried out by exposing to an atmosphere with a relative humidity of 80% or higher or by immersing it in water, and in this case, the higher the temperature of the atmosphere or water temperature of the humidification treatment, the more effective it is. In particular, it has been confirmed that the effect is significantly enhanced when the water temperature is 40° C. or higher. Also.
加湿処理後の残存水分は石英ガラス及び紫外線硬化性樹
脂等の被覆光ファイバの構成材料が長期劣化するのを助
長する虞があるために加湿処理後乾燥するのが好ましい
。It is preferable to dry the coated optical fiber after the humidification process, since residual moisture after the humidification process may promote long-term deterioration of the constituent materials of the coated optical fiber, such as quartz glass and ultraviolet curable resin.
（発明の効果）
本発明によれば、上記のように、被覆光ファイバの構成
材料である紫外線硬化性樹脂から水素が発生するのを有
効に防止することができるので被覆光ファイバの使用波
長帯での伝送損失を低下することができる実益がある。(Effects of the Invention) According to the present invention, as described above, it is possible to effectively prevent hydrogen from being generated from the ultraviolet curable resin that is the constituent material of the coated optical fiber. There is a practical benefit in being able to lower the transmission loss at
第１図及び第２図は本発明の処理が施される被覆光ファ
イバの２つの例の断面図、第３図は本発明の方法によっ
て処理された被覆光ファイバと従来の被覆光ファイバと
の水素発生実験の結果を示す線図、第４図は被覆光ファ
イバの含水率と水素発生婿との関係を示す線図である。
１０Ａ 、 ｌ ０Ｂ−−一−−被覆光ファイバ、１２
−−−−−光ファイバ、１４，１６．２４−一一一一紫
外線硬化性樹脂、 ２０−−−−一光ファイバ芯ｍ ＋
２６−−−− ９ｔ−ファイバユニット台1 and 2 are cross-sectional views of two examples of coated optical fibers treated according to the present invention, and FIG. 3 is a cross-sectional view of a coated optical fiber treated according to the method of the present invention and a conventional coated optical fiber. A diagram showing the results of the hydrogen generation experiment, FIG. 4 is a diagram showing the relationship between the water content of the coated optical fiber and the amount of hydrogen generated. 10A, 10B--1--Coated optical fiber, 12
---- Optical fiber, 14, 16. 24-1111 ultraviolet curable resin, 20---1 optical fiber core m +
26---9t-fiber unit stand
Claims (4)
以上の紫外線硬化性樹脂を被覆してなる光ファイバ芯線
またはこの光ファイバ芯線を複数本撚合せてその上に紫
外線硬化性樹脂を被覆してなる光ファイバユニットにお
いて、前記光ファイバ芯線または光ファイバユニットの
紫外線硬化性樹脂に加湿処理を施すことを特徴とする被
覆光ファイバの水素発生防止方法。(1) An optical fiber core wire formed by coating the outer circumference of a quartz glass optical fiber with at least one layer of ultraviolet curable resin, or a plurality of such optical fiber core wires twisted together and coated with an ultraviolet curable resin. 1. A method for preventing hydrogen generation in a coated optical fiber, characterized in that the optical fiber core wire or the ultraviolet curable resin of the optical fiber unit is subjected to a humidification treatment.
たは水中で行なわれる特許請求範囲第１項に記載の被覆
光ファイバの水素発生防止方法。(2) The method for preventing hydrogen generation in a coated optical fiber according to claim 1, wherein the humidification treatment is performed in an atmosphere with a relative humidity of 80% or more or in water.
以上である特許請求範囲第２項に記載の被覆光ファイバ
の水素発生防止方法。(3) The temperature of the atmosphere or water temperature of the humidification treatment is 40°C
The method for preventing hydrogen generation in a coated optical fiber according to claim 2 above.
とを特徴とする特許請求の範囲第１項乃至第３項のいず
れかに記載の被覆光ファイバの水素発生防止方法。(4) The method for preventing hydrogen generation in a coated optical fiber according to any one of claims 1 to 3, wherein the ultraviolet curable resin is dried after humidification treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61088122A JPS62245208A (en) | 1986-04-18 | 1986-04-18 | Method for preventing generation of hydrogen in coated optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61088122A JPS62245208A (en) | 1986-04-18 | 1986-04-18 | Method for preventing generation of hydrogen in coated optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62245208A true JPS62245208A (en) | 1987-10-26 |
Family
ID=13934100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61088122A Pending JPS62245208A (en) | 1986-04-18 | 1986-04-18 | Method for preventing generation of hydrogen in coated optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62245208A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179619A (en) * | 1990-11-13 | 1993-01-12 | Pirelli Cavi S.P.A. | Optical fibre element comprising a polyacrylate coating layer reticulated by UV radiation and an H2 -absorbing buffer |
| WO1997037950A1 (en) * | 1996-04-04 | 1997-10-16 | Sumitomo Electric Industries, Ltd. | Process for producing optical fiber products |
-
1986
- 1986-04-18 JP JP61088122A patent/JPS62245208A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179619A (en) * | 1990-11-13 | 1993-01-12 | Pirelli Cavi S.P.A. | Optical fibre element comprising a polyacrylate coating layer reticulated by UV radiation and an H2 -absorbing buffer |
| WO1997037950A1 (en) * | 1996-04-04 | 1997-10-16 | Sumitomo Electric Industries, Ltd. | Process for producing optical fiber products |
| GB2316891A (en) * | 1996-04-04 | 1998-03-11 | Sumitomo Electric Industries | Process for producing optical fiber products |
| AU720842B2 (en) * | 1996-04-04 | 2000-06-15 | Sumitomo Electric Industries, Ltd. | Process for producing optical fiber products |
| CN1107032C (en) * | 1996-04-04 | 2003-04-30 | 住友电气工业株式会社 | Process for producing optical fiber products |
| US6612134B1 (en) | 1996-04-04 | 2003-09-02 | Sumitomo Electric Industries, Ltd. | Method of curing coated optical fibers |
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