JP3871737B2 - Method of manufacturing a tape-like multi-core fiber - Google Patents

Method of manufacturing a tape-like multi-core fiber Download PDF

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JP3871737B2
JP3871737B2 JP20757096A JP20757096A JP3871737B2 JP 3871737 B2 JP3871737 B2 JP 3871737B2 JP 20757096 A JP20757096 A JP 20757096A JP 20757096 A JP20757096 A JP 20757096A JP 3871737 B2 JP3871737 B2 JP 3871737B2
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tape
multi
mm
preform
core fiber
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JPH1039148A (en )
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孝司 妻沼
尚樹 社本
恵司 金田
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株式会社フジクラ
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【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
この発明は、ラインセンサ、ライトガイド等に用いられるテープ状マルチコアファイバの製造方法に関し、細径コアにも係わらずコア配列の乱れが少ないものを提供する。 The present invention, the line sensor relates to a method for producing a tape-like multi-core fiber used in the light guide or the like, to provide what little disturbance of the core sequence despite small diameter core.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
テープ状マルチコアファイバの製造方法として、本発明者等は先に特願平6−90743号と特願平6−106248号を提案している。 As a method for producing a tape-like multi-core fiber, the present inventors have proposed a Japanese Patent Application No. Hei 6-90743 and Japanese Patent Application No. Hei 6-106248 previously.
前者は、スリット状の貫通孔を有する石英板を用意し、そのスリット状の貫通孔内に光ファイバを一列に並べてそれを母材とし、一端から溶融線引きしてテープ状マルチコアファイバとする方法である。 The former is a method providing a quartz plate having a slit-shaped through-holes, in a row of the optical fiber to the slit-shaped through hole to it with the base material, and melt drawn from one end to the tape-like multi-core fiber is there. また、後者は幅広い溝を有する石英板を用意し、その溝に光ファイバを一列に並べ、その上に石英板を被せて母材とし、一端から溶融線引きしてテープ状マルチコアファイバとする方法である。 Further, in the method the latter providing a quartz plate having a broad groove, arranged optical fibers in a row in the groove, covered with a quartz plate as a base material thereon, and a tape-like multi-core fiber to melt drawn from one end is there.
【0003】 [0003]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
しかしながら、これらの方法では、細径のコアを有するテープ状マルチコアファイバを得ようとして、スリット状の貫通孔もしくは幅広の溝に整列させる光ファイバの径を100μm以下にすると細過ぎて整列が困難となり、時として得られたテープ状マルチコアファイバは画素のズレ、空き等が生じたものとなり、歩留りが上がらないという問題があった。 However, in these methods, an attempt to obtain a tape-like multi-core fiber having a small diameter core, aligning the diameter of the optical fiber aligning the slit-shaped through-hole or wide grooves are too thin when the 100μm or less becomes difficult , is sometimes obtained tape-shaped multi-core fiber becomes that deviation of the pixel, a free such occurs, there is a problem that the yield does not increase.
【0004】 [0004]
【課題を解決するための手段】 In order to solve the problems]
この発明は、以上の問題の解決を図ったもので、その特徴とする請求項1記載の発明は、所定長さの石英ガラス系の光ファイバを複数本並列させて相互に固着して一次母材とする工程と、この一次母材をその一端から溶融線引きした後、所定長さに切断して二次母材とする工程と、この二次母材を純水に湿らせて、その複数個を溝付の石英ガラス系の板状体の溝内に整列させて収容し、その上に石英ガラス系の板状体を被せ相互に固着させて三次母材とする工程と、この三次母材をその一端から溶融線引きしてテープ状マルチコアファイバとする工程とからなることを特徴とするテープ状マルチコアファイバの製造方法にある。 The present invention has sought to solve the above problems, according the invention of claim 1, wherein, the primary mother by fixing to each other a plurality of juxtaposed so the optical fiber of silica glass-based with a predetermined length to its features a step of the wood, after melting delineate the primary preform from one end, a step of a secondary preform is cut to length, moisten the secondary preform in pure water, the plurality pieces were housed aligned in the groove of the plate-like body of silica glass-based grooved, the steps of the plate-like body and cover so fixed to each other tertiary base material of quartz glass based thereon, the tertiary base certain wood to the manufacturing method of the tape-like multi-core fiber, characterized in that comprising the step of the tape-like multi-core fiber to melt drawn from one end.
【0005】 [0005]
また、その特徴とする請求項2記載の発明は、所定長さの石英ガラス系の光ファイバを複数本並列させて相互に固着して一次母材とする工程と、この一次母材をその一端から溶融線引きした後、所定長さに切断して二次母材とする工程と、この二次母材の複数個をスリット付の石英ガラス系の板状体のスリット内に純水中で超音波振動をかけながら挿入させて三次母材とする工程と、この三次母材をその一端から溶融線引きしてテープ状マルチコアファイバとする工程とからなることを特徴とするテープ状マルチコアファイバの製造方法にある。 The invention of claim 2 wherein the characteristic includes the steps of a primary preform by fixing to each other a plurality of juxtaposed so the optical fiber of a predetermined length of the silica glass-based, one end of the primary preform after melting drawing, the steps of the secondary preform is cut to a predetermined length, a plurality of the secondary preform in pure water in the slit of the plate-like body of silica glass-based with slits ultra from process and method for producing a tape-shaped multicore fiber characterized by comprising the tertiary base material and a step of a tape-like multi-core fiber to melt drawn from one end thereof which is inserted while applying ultrasonic vibration to the tertiary base material It is in.
【0006】 [0006]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
図1〜4はこの発明方法の一実施例を示す説明図である。 Figure 1-4 is an explanatory view showing an embodiment of the present invention method. 図1に於いて、1は一次母材で、外径0.5〜3mm程度、長さ100〜1000mm程度の石英系光ファイバ(例えばGeO 2 −SiO 2コア、SiO 2クラッド、コアとクラッドとの比屈折率差Δ=1.0%)を5〜20本程度一列に並べ、相互に酸水素炎バーナ等で溶着加工してすだれ状としたものである。 In Figure 1, 1 is the primary preform, an outer diameter of about 0.5 to 3 mm, silica optical fiber (e.g. GeO 2 -SiO 2 core length of about 100 to 1000 mm, SiO 2 clad, a core and a cladding arranged relative refractive index difference Δ = 1.0%) of the one row 5 to 20 present, in which the interdigital welded processed at mutually oxyhydrogen flame burner or the like. このときのファイバ同士の溶着加工は、その全長にわたって行なうことは必ずしも必要ではなく、長さ500mm程度の母材の場合、両端と中間部の3ケ所で良い。 Fusion bonding the fibers to each other at this time is never be necessary to carry out over its entire length, when the base material having a length of about 500 mm, may be a 3 places of both end and middle portions.
【0007】 [0007]
このすだれ状の一次母材を一端から溶融線引きし、適宜長さに切断して所望サイズ(長さ100〜500mm,幅0.5〜5mm,高さ0.1〜0.25mm程度)の二次母材とする。 This Interdigital melt drawn from one end of the primary preform, the desired size and cut into appropriate lengths (length 100 to 500 mm, width 0.5 to 5 mm, height of about 0.1 to 0.25 mm) second the next base material. この線引きのときに炉の温度を2000〜2200℃に調整することによって各ファイバの側面同士が融着された、所望の径の断面形状が保存されたものがえられる。 Side surfaces of each fiber by adjusting the temperature of the furnace during the drawing at 2000-2,200 ° C. is fused, will be obtained which cross-sectional shape of the desired diameter has been saved.
なお、線引き開始時の錘として一次母材の先端に断面のサイズが略等しい石英板を溶着してもよい。 The size of the cross section at the tip of the primary preform as a weight at the drawing start may welded substantially equal quartz plate.
【0008】 [0008]
一方、図2に示すような幅広い溝22を有する石英板2が用意される。 On the other hand, the quartz plate 2 with broad grooves 22 as shown in FIG. 2 is prepared. この石英板の寸法は典型的には幅100mm,厚さ5mm,長さ500mm程度であり、また、溝22の幅は石英板の幅よりも2〜4mm狭く、かつ、20〜200個の二次母材が一列に並べられる幅とされ、更に、溝の深さは50〜2000μm、特に、100〜200μmが好適とされている。 The dimensions of the quartz plate is typically 100mm wide, the thickness of 5 mm, a length of 500mm or so, and the width of the groove 22 2~4mm narrower than the width of the quartz plate, and, 20 to 200 pieces of the two is the width of the next preform are arranged in a row, further, the depth of the groove is 50 to 2000 m, especially, 100-200 [mu] m is to be preferred.
【0009】 [0009]
そして、この石英板2の溝22に、図3に示すように二次母材を複数個一列に並べる。 Then, the groove 22 of the quartz plate 2, as shown in FIG. 3 arranged secondary preform into a plurality single row. この整列作業には乾燥した二次母材を用いても良いが、純水等に湿らせて整列させる方がスムーズに整列させることができる。 May be used dry secondary preform in the alignment work, it is possible to better align wetted in pure water or the like to smoothly aligned.
この二次母材が収容された石英板の上に図4に示すように石英板3の蓋をし、上下の石英板の重ねられた外側面を酸水素バーナ等で溶着し三次母材4とする。 The lid of the quartz plate 3 as shown in FIG. 4 on a quartz plate to the secondary preform is housed, the outer surface overlaid with the upper and lower quartz plate welded in the oxyhydrogen burner or the like tertiary base material 4 to. この三次母材4を加熱炉を用いて1700〜2000℃に加熱し、その一端から溶融線引きして幅0.5〜10mm(500〜10000μm)、厚さ25〜500μmの所望のテープ状マルチコアファイバとする。 Heating the tertiary base material 4 to 1700-2000 ° C. using a heating furnace, the width and melt drawn from one end 0.5~10mm (500~10000μm), the desired tape-like multi-core fiber having a thickness of 25~500μm to.
【0010】 [0010]
なお、このテープ状マルチコアファイバ上にはその線引き直後に熱硬化性樹脂や紫外線硬化型樹脂等のコーティングが施される。 Incidentally, in this tape-shaped multicore on fiber thermosetting resin or an ultraviolet curable resin coating is applied immediately after drawing.
また、線引きに先立って、図5に示すように三次母材4の一端に石英管5を取り付けるとともに他端に断面のサイズが等しいダミーの石英板6を溶着し、石英管5側から真空引きしつつ、ダミーの石英板6側から溶融線引きするようにしてやれば、得られるテープ状マルチコアファイバに泡等が入ることがなく、また、三次母材の大半を製品となしうるので効率的である。 Furthermore, prior to drawing, welded dummy quartz plate 6 is equal to the size of the cross section at the other end is attached to the quartz tube 5 at one end of the tertiary base material 4 as shown in FIG. 5, evacuation from the quartz tube 5 side and while, if Shiteyare quartz plate 6 side of the dummy so as to melt drawing, without bubbles or the like from entering the tape-shaped multicore fiber obtained, also is efficient as it can without a product the majority of the tertiary base material .
【0011】 [0011]
図6は、この発明方法の他の例に用いられるスリット状の貫通孔100を有する石英板10で、その幅、厚さ、長さは上記石英板のそれと同一サイズで、スリットの幅は並列させる二次母材の個数によるがその幅よりも僅かだけ大きくされている。 Figure 6 is a quartz plate 10 having other slit-shaped through-hole 100 used in Examples of the present invention method, the width, thickness, in identical size length above the quartz plate, the width of the slit parallel It is only slightly greater than its width by the number of secondary preform to. そして、このスリット内に所定個数の二次母材を一列に挿入して三次母材とする。 Then, the secondary preform of a predetermined number in the slit is inserted in a line to tertiary base material.
なお、二次母材のスリット内への挿入に際しては、純水中で超音波振動をかけながら行なうと挿入が容易にできる。 Note that when inserted into the slit of the secondary preform, inserted performed while applying ultrasonic vibration in pure water can be easily. その後の取扱は、全く上記例と同様にして行なうことができる。 Subsequent handling can be completely carried out in the same manner as the above example.
【0012】 [0012]
【実施例】 【Example】
実施例1 Example 1
直径2mmφ、長さ500mm石英系ファイバ(例えばGeO 2 −SiO 2コア、SiO 2クラッド、コアとクラッドとの比屈折率差Δ=1%)を15本用意した。 Diameter 2 mm, length 500mm silica fiber (e.g. GeO 2 -SiO 2 core, SiO 2 clad, the core and the cladding and the relative refractive index difference Δ = 1%) and the prepared 15 present. このファイバを一列に並べ、これらの両端と中央部を相互に酸水素バーナで溶着して一次母材とし、この一次母材を2000℃に加熱してその一端から溶融線引きして幅3mm、厚さ0.2mmのテープ状ファイバとし、これを長さ450mmに切断して二次母材としたものを15個用意した。 Arranging the fiber in a row, by welding these ends and the central portion to each other through a oxyhydrogen burner and the primary preform, width 3mm this primary preform was melt drawn from one end thereof was heated to 2000 ° C., the thickness It is a tape-like fiber of 0.2 mm, which was what was 15 prepared to have a length 450mm to cut into the secondary preform.
一方、幅48mm、厚さ2.5mm、長さ500mm、溝の幅45mm、深さ0.21mmの石英ガラス板を用意し、この溝の中に純水に湿らせた15個の二次母材を一列に並べ、乾燥させその上に幅48mm、厚さ2.5mm、長さ500mmの石英ガラス板を被せ、この両石英ガラス板の重ね合わせ部分を酸水素バーナで溶着し三次母材とした。 On the other hand, the width 48 mm, thickness 2.5 mm, length 500 mm, width 45mm groove, providing a quartz glass plate having a depth 0.21 mm, 15 pieces of secondary mother moistened in pure water in the groove arranging wood in a row, dried width 48mm thereon, thickness 2.5 mm, covered with a quartz glass plate having a length 500 mm, and welded the overlapping portions of the two quartz glass plates in oxyhydrogen burner tertiary base material did. この三次母材の一端にダミーの石英ガラス板を溶着するとともに他端には石英管を溶着し、この石英管側から真空引きしつつダミーの石英ガラス板側を2170℃に加熱して溶融線引きし長さ160m、幅2.4mm、厚さ0.25mm、コア数225のテープ状マルチコアファイバとし、その上に100μm厚さに紫外線硬化型樹脂をコーティングした。 Welded quartz tube at the other end with welding the dummy quartz glass plate at one end of the tertiary base metal, melt drawing a dummy quartz glass plate side while evacuating from the quartz tube side was heated to 2170 ° C. and length 160 m, width 2.4 mm, thickness of 0.25 mm, and a tape-like multi-core fiber of cores 225, was coated with a UV-curable resin to 100μm thick thereon.
得られたテープ状マルチコアファイバは、画素径が7.5μmと細いにもかかわらず画素のズレ、画素の空きのないものであった。 The resulting tape-like multi-core fiber, even though the pixels of the shift pixel diameter thin and 7.5 [mu] m, was free of free pixels.
【0013】 [0013]
実施例2 Example 2
二次母材として実施例1と同じものを用いた。 It was the same as in Example 1 as a secondary preform. 一方、幅48mm、厚さ5mm、長さ500mm、スリットの幅45mm、高さ0.21mmの石英ガラス板を用意し、純水中でスリット内に15個の二次母材を超音波振動をかけながら一列に整列させ、これを乾燥させて三次母材とした。 On the other hand, the width 48 mm, thickness 5 mm, length 500 mm, width 45mm slit prepared quartz glass plate height 0.21 mm, the ultrasonic vibration fifteen secondary preform into the slit in pure water aligned in a row while applying, it was a tertiary base material and dried it.
その後は実施例1と同様にして、長さ160m、幅2.4mm、厚さ0.25mm、コア数225のテープ状マルチコアファイバとし、その上に100μm厚さに紫外線硬化型樹脂をコーティングした。 Thereafter, the same procedure as in Example 1, the length 160 m, width 2.4 mm, thickness of 0.25 mm, and a tape-like multi-core fiber of cores 225, was coated with a UV-curable resin to 100μm thick thereon.
得られたテープ状マルチコアファイバは、画素径が7.5μmと細いにもかかわらず画素のズレ、画素の空きのないものであった。 The resulting tape-like multi-core fiber, even though the pixels of the shift pixel diameter thin and 7.5 [mu] m, was free of free pixels.
【0014】 [0014]
【発明の効果】 【Effect of the invention】
この発明方法は、予め複数のファイバを用意し、これらを一列に配列して相互に固着してすだれ状になし、これを溶融線引きしたものの複数本を板状体に形成された溝あるいはスリット内に一列に収容する方法であるので、ファイバの整列が容易であり、細径のファイバを用いても画素の配列に乱れのないテープ状マルチコアファイバがえられる。 The present invention method is previously prepared a plurality of fibers, these are fixed to each other are arranged in a row without the interdigital, which melt drawn to formed a plurality of the plate-like body despite groove or the slit since a method of accommodating in a row in a easy alignment of the fiber, tape-like multi-core fiber with no disturbance in the arrangement of the pixels will be obtained even with a small-diameter fiber.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】テープ状に配列したマルチコアファイバの斜視図。 1 is a perspective view of the multi-core fiber arranged in a tape.
【図2】テープ状に配列したマルチコアファイバを収容する石英板の斜視図。 2 is a perspective view of the quartz plate to accommodate the multi-core fiber arranged in a tape.
【図3】石英板に2次母材を収容した状態の斜視図。 3 is a perspective view of the accommodated state secondary preform in a quartz plate.
【図4】石英板に2次母材を収容し蓋をした状態の斜視図。 4 is a perspective view of the quartz plate to accommodate the secondary preform while the lid.
【図5】三次母材の一端に石英管を取付け他端にダミー石英管を取り付けた状態の側面図。 Figure 5 is a side view of a state of attaching the dummy quartz tube at one end attached to the quartz tube to the other end of the tertiary base material.
【図6】スリット状貫通孔を有する石英板10の斜視図。 6 is a perspective view of the quartz plate 10 having a slit-shaped through-hole.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 一次母材2 石英板22 溝3 石英板の蓋4 三次母材5 石英管6 ダミーの石英板10 石英板100 スリット条貫通孔 1 primary preform 2 quartz plate 22 the grooves 3 quartz plate cover 4 the tertiary base material 5 quartz tube 6 dummy quartz plate 10 a quartz plate 100 a slit strip through-hole of

Claims (2)

  1. 所定長さの石英ガラス系の光ファイバを複数本並列させて相互に固着して一次母材とする工程と、この一次母材をその一端から溶融線引きした後、所定長さに切断して二次母材とする工程と、この二次母材を純水に湿らせて、その複数個を溝付の石英ガラス系の板状体の溝内に整列させて収容し、その上に石英ガラス系の板状体を被せ相互に固着させて三次母材とする工程と、この三次母材をその一端から溶融線引きしてテープ状マルチコアファイバとする工程とからなることを特徴とするテープ状マルチコアファイバの製造方法。 A step of the primary preform by fixing to each other a plurality of juxtaposed so the optical fiber of a predetermined length of the silica glass-based, after melting delineate the primary preform from one end, the two are cut to a predetermined length a step of the next preform, the secondary preform moistened in pure water, the plurality houses are aligned in the groove of the plate-like body of silica glass-based grooved quartz glass thereon a step of a tertiary base material by sticking to each other covered with a plate-shaped body of the system, the tape-like multi-core, characterized in that it consists of a step of a tape-like multi-core fiber by melt drawing the tertiary base material from one end method of manufacturing a fiber.
  2. 所定長さの石英ガラス系の光ファイバを複数本並列させて相互に固着して一次母材とする工程と、この一次母材をその一端から溶融線引きした後、所定長さに切断して二次母材とする工程と、この二次母材の複数個をスリット付の石英ガラス系の板状体のスリット内に純水中で超音波振動をかけながら挿入させて三次母材とする工程と、この三次母材をその一端から溶融線引きしてテープ状マルチコアファイバとする工程とからなることを特徴とするテープ状マルチコアファイバの製造方法。 A step of the primary preform by fixing to each other a plurality of juxtaposed so the optical fiber of a predetermined length of the silica glass-based, after melting delineate the primary preform from one end, the two are cut to a predetermined length a step of the next preform, step of a plurality of the secondary preform is inserted while applying ultrasonic vibration in pure water in the slit of the plate-like body of the silica glass system with slit and tertiary matrix When manufacturing method of the tape-like multi-core fiber, characterized in that comprising the step of the tape-like multi-core fiber by melt drawing the tertiary base material from one end thereof.
JP20757096A 1996-07-19 1996-07-19 Method of manufacturing a tape-like multi-core fiber Expired - Fee Related JP3871737B2 (en)

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JPH1039148A (en) 1998-02-13 application

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