JPS61201647A - Production of optical fiber and heat-treating bobbin used therefor - Google Patents

Production of optical fiber and heat-treating bobbin used therefor

Info

Publication number
JPS61201647A
JPS61201647A JP60042960A JP4296085A JPS61201647A JP S61201647 A JPS61201647 A JP S61201647A JP 60042960 A JP60042960 A JP 60042960A JP 4296085 A JP4296085 A JP 4296085A JP S61201647 A JPS61201647 A JP S61201647A
Authority
JP
Japan
Prior art keywords
optical fiber
bobbin
heat
fiber strand
treating
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
Application number
JP60042960A
Other languages
Japanese (ja)
Inventor
Kazuo Ando
安藤　和夫
Takahiro Abe
孝博 阿部
Katsumi Morita
克己 森田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tatsuta Electric Wire and Cable Co Ltd
Original Assignee
Tatsuta Electric Wire and Cable Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tatsuta Electric Wire and Cable Co Ltd filed Critical Tatsuta Electric Wire and Cable Co Ltd
Priority to JP60042960A priority Critical patent/JPS61201647A/en
Publication of JPS61201647A publication Critical patent/JPS61201647A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/10—Non-chemical treatment
    • C03B37/12—Non-chemical treatment of fibres or filaments during winding up
    • 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
    • G02B6/4439—Auxiliary devices
    • G02B6/4457—Bobbins; Reels

Abstract

PURPOSE:To reduce the generation of side pressure and to prevent increase in light loss by winding an optical fiber strand around a bobbin whose drum part is formed with the material having almost the same thermal expansion coefficient as the optical fiber strand, heat-treating the strand and then secondarily coating the strand. CONSTITUTION:An optical fiber strand 2 coated with the primary coating layer and a buffer layer is wound around the drum part 4 of a heat-treating bobbin 1 formed with a material having almost the same thermal expansion coefficient as the optical fiber strand (the drum part made of glass is preferable). After winding, flanges 4 and 5 are detached by unfastening a fitting bolt 8 and a nut 10, the optical fiber strand 2 is heat-treated while being wound around the drum part 4 and then secondary coating of nylon, etc., is carried out.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、主として光ファイバ素線に被覆されるシリコ
ーン樹脂等から発生する水素による損失増加の影響を低
減するのに好適な光ファイバの製造方法および該製造方
法に用いる熱処理用ボビンに関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is directed to an optical fiber suitable for reducing the influence of increased loss due to hydrogen mainly generated from silicone resin coated on an optical fiber. The present invention relates to a manufacturing method and a heat treatment bobbin used in the manufacturing method.

（ロ）従来技術とその問題点 光ファイバは、表面傷の発生や側圧によるマイクロベン
ド損失等の発生を防止し、また、取り扱いを容易にする
ために、コア、クラッドからなる光ファイバに対してシ
リコン樹脂、ナイロン樹脂などによる被覆が行なわれる
。(b) Conventional technology and its problems In order to prevent the occurrence of surface scratches and microbend loss due to lateral pressure, and to facilitate handling, optical fibers are made of a core and a cladding. Covering with silicone resin, nylon resin, etc. is performed.

しかしながら、このような樹脂による被覆を行なうと、
該樹脂から発生する水素が光ファイバ素線内に拡散して
ＯＨ基を形成し、このため１．４μｍにピークを持つ光
損失の増加が生じる。However, when coating with such a resin,
Hydrogen generated from the resin diffuses into the optical fiber to form OH groups, resulting in an increase in optical loss having a peak at 1.4 μm.

この水素の発生は、シリコーン樹脂またはナイロン樹脂
中の水分がシリコーン樹脂中のＳｔ基と反応することに
よるものと考えられている。This generation of hydrogen is thought to be due to the reaction of water in the silicone resin or nylon resin with the St group in the silicone resin.

そこで、このような光損失の増加を防ぐため、一方では
被覆材料の改良が探究されているが、他方、現状の被覆
材料のままでも前記のような光損失の増加が生じないよ
うにする方法が望まれていた。Therefore, in order to prevent such an increase in optical loss, on the one hand, improvement of the coating material is being investigated, but on the other hand, on the other hand, there is a method to prevent the above-mentioned increase in optical loss from occurring even if the current coating material is used. was desired.

後者の方法として、光ファイバに一次被覆層、緩衝層等
を設けた後、これを熱処理する方法が知られているが、
従来の鉄製ボビン、アルミニュウム製ボビン等に巻き付
けて熱処理すると光伝送波長域全体にわたって光損失が
増加するという問題があった。As the latter method, a method is known in which a primary coating layer, a buffer layer, etc. are provided on the optical fiber and then heat treatment is performed.
When wound around a conventional iron bobbin, aluminum bobbin, etc. and heat-treated, there is a problem in that optical loss increases over the entire optical transmission wavelength range.

本発明は、このような事情に鑑みてなされたものであっ
て、シリコーン樹脂等からなる一次被覆層、緩衝層とナ
イロン樹脂等からなる二次被覆を設けた光ファイバの製
造方法において、光損失の増加を防止する方法を提供す
ることを目的とする。The present invention has been made in view of the above circumstances, and is an optical fiber manufacturing method in which a primary coating layer made of silicone resin or the like, a buffer layer and a secondary coating made of nylon resin or the like are provided. The purpose is to provide a method to prevent the increase in

（ハ）問題点を解決するための手段 本発明は、上記の目的を達成するための手段として、光
ファイバ素線を熱膨張係数が該光ファイバ素線とほぼ等
しい材料で胴部を形成してなるボビンに巻き取り、次い
で、該ボビンに巻いた状態で前記光ファイバ素線を熱処
理した後、二次被覆を行なうものである。(C) Means for Solving the Problems The present invention, as a means for achieving the above-mentioned object, comprises forming a body of an optical fiber using a material having a coefficient of thermal expansion approximately equal to that of the optical fiber. The optical fiber is then wound around a bobbin, and then the optical fiber is heat-treated while being wound around the bobbin, and then a secondary coating is applied.

また、光ファイバ素線を熱処理する際に使用する熱処理
用ボビンは、光ファイバ素線とほぼ等しい熱膨張係数を
有する材料で形成された胴部と、該胴部の両端部に着脱
自在に設けられた鍔とを備えることを特徴としている。In addition, the heat treatment bobbin used when heat treating the optical fiber strand has a body made of a material having a coefficient of thermal expansion approximately equal to that of the optical fiber, and is detachably installed at both ends of the body. It is characterized by having a curved tsuba.

熱処理時に用いるボビンの胴部の材料を光ファイバ素線
と熱膨張係数のほぼ等しいものとする理由は、熱処理時
の熱膨張によって光ファイバに側圧が加わることを防止
するためである。The reason why the material for the body of the bobbin used during heat treatment is made to have a coefficient of thermal expansion almost equal to that of the optical fiber is to prevent lateral pressure from being applied to the optical fiber due to thermal expansion during heat treatment.

（ホ）実施例 以下、本発明を図面に示す実施例に基づいて詳細に説明
する。(e) Examples Hereinafter, the present invention will be explained in detail based on examples shown in the drawings.

図は本発明の実施例に係る熱処理用ボビンの中央断面図
である。同図において、符号ｌは熱処理用ボビン、２は
シリコーン樹脂の一次被覆層およびシリコーン樹脂の緩
衝層が被覆された光ファイバ素線、４は光ファイバ素線
２とほぼ等しい熱膨張係数を有するガラス製の円筒状の
胴部、６ａ。The figure is a central sectional view of a heat treatment bobbin according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a heat treatment bobbin, 2 denotes an optical fiber coated with a silicone resin primary coating layer and a silicone resin buffer layer, and 4 denotes a glass having a coefficient of thermal expansion almost equal to that of the optical fiber 2. A cylindrical body made of 6a.

６ｂはそれぞれ該胴部４の両端部に着脱自在に設けられ
たプラスチック製の鍔である。この鍔６ａ。Reference numerals 6b denote plastic flanges that are detachably provided at both ends of the body portion 4, respectively. This tsuba 6a.

６ｂは、上記胴部４内を挿通する取付ボルト８にナツト
１０を螺合することにより、胴部４に固定されている。6b is fixed to the body 4 by screwing a nut 10 onto a mounting bolt 8 that passes through the body 4.

光ファイバの製造にあたっては、−次被覆層、緩衝層を
形成した光ファイバ素線２を熱処理用ボビン１の胴部２
に巻き取り、巻き取り後は取付ボルト８、ナツトｌＯを
緩めて鍔６ａ、６ｂを取り外す。そして、光ファイバ素
線２を胴部２に巻き取った状態で熱処理をした後、ナイ
ロン樹脂の二次被覆を行なう。In manufacturing the optical fiber, the optical fiber strand 2 on which the secondary coating layer and the buffer layer have been formed is placed in the body 2 of the heat treatment bobbin 1.
After winding up, loosen the mounting bolt 8 and nut 1O and remove the collars 6a and 6b. Then, after heat treatment is performed on the optical fiber wire 2 wound around the body 2, a secondary coating of nylon resin is performed.

上記の熱処理用ボビン１を適用して巻き取った光ファイ
バ素線２を１７０℃×６時間加熱処理したものについて
、その光損失を測定した結果を第１表に示す。なお、比
較のために、従来方法の鉄製ボビン、アルミニュウム製
ボビンにそれぞれ巻き取った後、熱処理した場合の測定
結果および熱処理しない場合の測定結果をそれぞれ第２
表に示す。Table 1 shows the results of measuring the optical loss of an optical fiber 2 wound using the heat treatment bobbin 1 and heat treated at 170° C. for 6 hours. For comparison, the measurement results when heat-treated and those without heat treatment after winding on iron bobbins and aluminum bobbins using the conventional method are shown in the second section.
Shown in the table.

なお、外部被覆後の加熱試験（２００℃×６時第１表 売　　木線　　　　加熱前　　２．３７　　Ｇ、５６　
１．３１損　　　　　　＊１加熱後　　２．４１　　ｏ
、ｓｏ　　ｔ、ｓｙ失　　二次被覆後　加熱前　　２．
５０　０．５１　１．２４（ｄ［ｌ／ｋｍ）　　　　　
　＊＊加熱後　　２．６１　０，５２　３．７８＊　、
　：１７＊℃×６時間加熱 ＊鵞；２００℃×６時間加熱 光　素線　　　加熱前　２．５５０．５ｇ　１．４５　
２．５９０．６４１．０８　２．５３０．５１１．１０
損　　　　　　＊、加熱後　２．５９０．５９１．６４
　２．６９０．６３１．２１　−　−　−失　二次被覆
後加熱前　３．３３０．９Ｂ　２．８５　３．９０　！
、６０２．１０　２．５４０．５２１．１２（ｄＢ／ｋ
１１）　　　　　＊を加熱後　３．４２１．０２７．１
３　３．９５１．９３６．５７１１．２Ｂ　１．７８１
５．８４＊、、１７＊℃×６時間加熱 ＊＊；２００℃×６時間加熱 間）は、促進劣化のためのもので、常温で長時間放置し
た場合の劣化に相当するものである。In addition, heating test after external coating (200℃ x 6 o'clock 1st sale wood line before heating 2.37G, 56
1.31 loss *1 After heating 2.41 o
, so t, sy loss After secondary coating Before heating 2.
50 0.51 1.24 (d [l/km)
**After heating 2.61 0.52 3.78*,
: 17*℃ x 6 hours heating * 200℃ x 6 hours heating light Element wire Before heating 2.550.5g 1.45
2.590.641.08 2.530.511.10
Loss *, after heating 2.590.591.64
2.690.631.21 - - -Loss After secondary coating and before heating 3.330.9B 2.85 3.90!
, 602.10 2.540.521.12 (dB/k
11) After heating *3.421.027.1
3 3.951.936.5711.2B 1.781
5.84*, 17*°C x 6 hours heating**; 200°C x 6 hours heating) is for accelerated deterioration and corresponds to deterioration when left at room temperature for a long time.

以上の結果から明らかなように、（ａ）熱処理しない場
合は二次被覆後、加熱すると損失が急増する（特に１．
３８μｍ）。（ｂ）素線の段階で鉄製ボビン、アルミ製
ボビンに巻いて熱処理したものは、二次被覆後にどの波
長域でも損失が増加する。（ｃ）これに対して、素線を
ガラス製ボビンに巻いて熱処理したものは、どの段階で
も顕著な損失の増加は見られない。As is clear from the above results, (a) in the case of no heat treatment, the loss increases rapidly when heated after secondary coating (especially 1.
38 μm). (b) Wires that are wound around iron bobbins or aluminum bobbins and heat treated at the stage of strands have increased loss in all wavelength ranges after secondary coating. (c) On the other hand, when the wire is wound around a glass bobbin and heat treated, no significant increase in loss is observed at any stage.

（へ）効果 以上のように本発明によれば、−次被覆層、緩衝層等を
設けた光ファイバ素線を熱膨張係数が該光ファイバ素線
とほぼ等しい材料で胴部を形成してなるボビンに巻き取
った後、熱処理するので、水分を容易に除去でき、かつ
、側圧の発生が少なくなるので、光伝送波長域全体にお
ける光損失の増加を防止することができる。しかも、本
発明の熱処理用ボビンを用いれば、側圧による光損失の
増加を低減できるので、伝送特性の良好な光ファイバを
製造できるようになる等の効果が発揮される。。(f) Effects As described above, according to the present invention, the body of an optical fiber provided with a secondary coating layer, a buffer layer, etc. is formed of a material having a coefficient of thermal expansion approximately equal to that of the optical fiber. Since the material is heat-treated after being wound onto a bobbin, moisture can be easily removed and lateral pressure is less generated, so that an increase in optical loss in the entire optical transmission wavelength range can be prevented. Furthermore, by using the heat treatment bobbin of the present invention, it is possible to reduce the increase in optical loss due to lateral pressure, so that effects such as being able to manufacture optical fibers with good transmission characteristics are exhibited. .

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明の一実施例を示す熱処理用ボビンの中央断
面図である。 ｌ・・熱処理用ボビン、２・・、光ファイバ素線、４．
、。 ボビンの胴部、６ａ、６ｂ・・・ボビンの鍔。The drawing is a central sectional view of a heat treatment bobbin showing an embodiment of the present invention. l... Bobbin for heat treatment, 2..., optical fiber strand, 4.
,. Body of bobbin, 6a, 6b... collar of bobbin.

Claims (3)

【特許請求の範囲】[Claims] （１）光ファイバ素線を熱膨張係数が該光ファイバ素線
とほぼ等しい材料で胴部を形成してなるボビンに巻き取
り、次いで、該ボビンに巻き取った状態で前記光ファイ
バ素線を熱処理した後、二次被覆を行なうことを特徴と
する光ファイバの製造方法。(1) An optical fiber strand is wound around a bobbin whose body is made of a material whose thermal expansion coefficient is approximately equal to that of the optical fiber strand, and then the optical fiber strand is wound around the bobbin. A method of manufacturing an optical fiber, which comprises performing a secondary coating after heat treatment. （２）光ファイバ素線を熱処理する際に使用するボビン
であって、前記光ファイバ素線とほぼ等しい熱膨張係数
を有する材料で形成された胴部と、該胴部の両端部に着
脱自在に設けられた鍔とを備えることを特徴とする熱処
理用ボビン。(2) A bobbin used when heat-treating an optical fiber strand, which has a body portion made of a material having a coefficient of thermal expansion approximately equal to that of the optical fiber strand, and is detachable from both ends of the body portion. A heat treatment bobbin characterized by comprising a flange provided at the flange. （３）胴部はガラスでできたものである特許請求の範囲
第２項に記載の熱処理用ボビン。(3) The heat treatment bobbin according to claim 2, wherein the body is made of glass.
JP60042960A 1985-03-04 1985-03-04 Production of optical fiber and heat-treating bobbin used therefor Pending JPS61201647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60042960A JPS61201647A (en) 1985-03-04 1985-03-04 Production of optical fiber and heat-treating bobbin used therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60042960A JPS61201647A (en) 1985-03-04 1985-03-04 Production of optical fiber and heat-treating bobbin used therefor

Publications (1)

Publication Number Publication Date
JPS61201647A true JPS61201647A (en) 1986-09-06

Family

ID=12650594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60042960A Pending JPS61201647A (en) 1985-03-04 1985-03-04 Production of optical fiber and heat-treating bobbin used therefor

Country Status (1)

Country Link
JP (1) JPS61201647A (en)

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