JPS62292651A - Production of base material for quartz optical fiber - Google Patents
Production of base material for quartz optical fiberInfo
- Publication number
- JPS62292651A JPS62292651A JP13348486A JP13348486A JPS62292651A JP S62292651 A JPS62292651 A JP S62292651A JP 13348486 A JP13348486 A JP 13348486A JP 13348486 A JP13348486 A JP 13348486A JP S62292651 A JPS62292651 A JP S62292651A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- sol
- quartz tube
- quartz
- base material
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000010453 quartz Substances 0.000 title claims abstract description 33
- 239000013307 optical fiber Substances 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 5
- 239000002019 doping agent Substances 0.000 claims abstract description 4
- 239000010419 fine particle Substances 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims abstract 3
- 238000000034 method Methods 0.000 claims description 15
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract 2
- 238000000151 deposition Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000007062 hydrolysis Effects 0.000 description 7
- 238000006460 hydrolysis reaction Methods 0.000 description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 5
- 238000003980 solgel method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229920006298 saran Polymers 0.000 description 2
- GXMNGLIMQIPFEB-UHFFFAOYSA-N tetraethoxygermane Chemical compound CCO[Ge](OCC)(OCC)OCC GXMNGLIMQIPFEB-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/016—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by a liquid phase reaction process, e.g. through a gel phase
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明は、石英系光ファイバ用母材の製造方法に関する
。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method of manufacturing a preform for a quartz-based optical fiber.
石英系の光ファイバは、将来のＰＣＭ通信などの伝送路
として、必要欠くべからざるものとして、最近特にその
生産が拡大しつつある。その製造方法としてＶＡＤ法、
ＭＣＶＤ法などが比較的よく知られているが、最近注目
されている技術としてブルーゲル法があり、比較的安価
に石英管、ファイバが作製されるようになった。また、
石英管の内面にゾルをスプレーしてシリカを堆積させ焼
結して光ファイバ用母材とする特許も報告されている（
ＵＫ ｐａｔｅｎｔ ＧＢ２０２３５７１Ａ） 。The production of quartz-based optical fibers has been expanding recently, as they are indispensable as transmission lines for future PCM communications and the like. The manufacturing method is VAD method,
Although the MCVD method is relatively well known, the blue gel method is a technique that has recently attracted attention, and it has become possible to produce quartz tubes and fibers at relatively low cost. Also,
A patent has also been reported for spraying sol on the inner surface of a quartz tube to deposit silica and sintering it as a base material for optical fibers (
UK patent GB2023571A).
しかしながら、ＭＣＶＤ法やＶＡＤ法では、製造原価が
扁価でありそれらよりも安価にできるブルーゲル法では
現在のところ日数がかかりすぎるなどの欠点がある。ま
た、これらの方法は、ファイバを作製するために大がか
りな装置が必要とな本発明は、この様な問題点を解決す
るためのもので、その目的は、比較的安価でかつ容易に
短期間で石英系光ファイバを作製することにある。However, the MCVD method and the VAD method have drawbacks such as low manufacturing costs, and the blue gel method, which is cheaper than them, currently takes too many days. In addition, these methods require large-scale equipment to fabricate the fiber.The present invention is intended to solve these problems, and its purpose is to fabricate fibers at relatively low cost and easily in a short period of time. The objective is to fabricate a silica-based optical fiber.
本発明の石英系光ファイバ用母材は、屈折率を変化させ
るためのドーパントを含む、あるいは含まない石英管の
内面に、有効シリカ分を０．１ｇ／ ｍ １以上含みか
つそのうちの０〜１００％が平均粒径０．０１〜１μｍ
のシリカ微粒子であるゾルを、薄く、均一につけたのち
ゲル化させ乾燥・焼結を行ない、その後中実化し石英系
光ファイバを得ることを特徴とする。The quartz-based optical fiber preform of the present invention contains an effective silica content of 0.1 g/m1 or more on the inner surface of the quartz tube, which may or may not contain a dopant for changing the refractive index, and has an effective silica content of 0 to 100%. % is average particle size 0.01-1μm
A silica-based optical fiber is obtained by applying a thin and uniform sol of silica particles, gelling it, drying and sintering it, and then solidifying it to obtain a silica-based optical fiber.
〔実施例１〕
エチルシリケート６２．１ｇに０．２Ｎ塩酸８．０ｇを
加え、十分に攪拌しながら加水分解を行なった。[Example 1] 8.0 g of 0.2N hydrochloric acid was added to 62.1 g of ethyl silicate, and hydrolysis was carried out with sufficient stirring.
次にテトラエトキシゲルマニウム（トリケミカル研究所
）７．５ｇを加えて十分に撹拌し反応させた後、水１３
．４ｇを加え加水分解を終了させた。Next, 7.5 g of tetraethoxygermanium (Trichemical Institute) was added and stirred sufficiently to react, and then 13 g of water was added.
．． 4 g was added to complete the hydrolysis.
エチルノリケート１４４．９ｇ、無水エタノール２４４
．２ｇ、２９％アンモニア水６．２ｇ、水５０．０ｇを
混合し、２時間激しく攪拌した後、冷暗所にて熟成し、
シリカ微粒子を成長させた、この溶液を減圧濃縮した後
、乾燥工程の歩留りを上げるために濃縮液のアルコール
分を水と部分的に置換した。その後、加水分解溶液と混
合した際に急激なゲル化を起こさないようにｐ）（値を
２規定の塩酸を用いて４，０に調整し、さらに１．０μ
ｍのメンブランフィルタ−を用いて′ｆｉ過し平均粒系
０．２８μｍのシリカ微粒子の分散溶液を作り、前記加
水分解溶液と混合しゾルとした。144.9 g of ethyl noricate, 244 g of absolute ethanol
．． 2g, 6.2g of 29% ammonia water, and 50.0g of water were mixed, stirred vigorously for 2 hours, and aged in a cool dark place.
After the solution in which the silica particles were grown was concentrated under reduced pressure, the alcohol content of the concentrated solution was partially replaced with water in order to increase the yield of the drying process. After that, the value was adjusted to 4.0 using 2N hydrochloric acid to prevent rapid gelation when mixed with the hydrolysis solution, and then 1.0μ
A dispersion solution of silica fine particles having an average particle size of 0.28 μm was prepared by filtering the dispersion solution using a membrane filter of 0.28 μm, and mixed with the hydrolyzed solution to form a sol.
ゾル−ゲル法により作成された直径２０ｍｍ、内径１０
ｍ、長さ５０ｃｍの石英管の内面を十分に洗浄しよく乾
燥させて、両端に蓋をした。前記ゾルを０．２Ｎアンモ
ニア水と水を使用してｐＨ（ｉを４．２にし、かつ体積
を２０ Ｑｍｆに調整した後その４．３ｍｌを石英キュ
ーブ中に入れ、蓋をしだ後２０００ｒｐｍで回転しなが
らゲル化させた。Diameter 20mm, inner diameter 10, created by sol-gel method
The inner surface of a 50 cm long quartz tube was thoroughly washed and dried, and both ends were capped. After adjusting the pH (i) of the sol to 4.2 and the volume to 20 Qmf using 0.2N ammonia water and water, 4.3 ml of the sol was placed in a quartz cube, and after the lid was closed, the mixture was heated at 2000 rpm. It was gelled while rotating.
これを７０℃で４日間乾燥させた。つづいて１０００℃
で加熱することでガラス化し、中実化することにより石
英系光ファイバ用母材を得た。同様の手順に従って５０
本のファイバを作製したところ、歩留り８０％で作製で
きた。This was dried at 70°C for 4 days. Then 1000℃
The material was vitrified by heating and solidified to obtain a base material for a quartz-based optical fiber. 50 following similar steps
When we produced this fiber, we were able to produce it with a yield of 80%.
得られた光ファイバの赤外域での吸収スペクトルにより
ＯＨｉの含有量を測定したところ、２．７μｍでの吸収
ピークが全く認められず、ｌｐｐｍ以下であることが確
認された。また、得られたファイバを線引きしたところ
、ｌｄＢ／ｋｐｍ以下のｔ員失であることが確認された
。さらにクランド径１２５μｍに対し４μｍのコア径で
あり、比屈折率差は０．３％であることが１ｉｆｉされ
た。これらより本発明により得られた光ファイバはシン
グルモードファイバとしての条件を満たしており、従来
法で得られた光ファイバとなんら変わることがないこと
が確認された。When the OHi content was measured by the absorption spectrum in the infrared region of the obtained optical fiber, no absorption peak at 2.7 μm was observed, and it was confirmed that the content was less than 1 ppm. Further, when the obtained fiber was drawn, it was confirmed that the fiber loss was less than 1 dB/kpm. Furthermore, it was determined that the core diameter was 4 μm with respect to the crund diameter of 125 μm, and the relative refractive index difference was 0.3%. From these results, it was confirmed that the optical fiber obtained by the present invention satisfies the conditions as a single mode fiber and is no different from the optical fiber obtained by the conventional method.
〔実施例２〕
実施例１と同様な方法で作製されたゾルを、０゜２Ｎア
ンモニア水と水を使用してｐＨ（ｉを４．２にしかつ体
積を２００ｍ＋ｊ！に調整した後その３ｍｌ、直径２０
ｆｌ、長さ５０Ｌ３の石英管（東芝セラミンクス）の両
端に蓋をして流し込み８００ｒｐｍで回転させながらゲ
ル化させた。これを６０℃で５日間乾燥させ、１４００
℃まで加熱し、ガラス化した後中実化することにより石
英系光ファイバを得た。同様の手順に従って５０本のフ
ァイバを作製したところ、歩留り８５％で作製できた。[Example 2] A sol prepared in the same manner as in Example 1 was adjusted to pH (i to 4.2 and volume to 200 m+j! using 0°2N ammonia water and water, and then 3 ml of the sol was adjusted to 200 m+j!). Diameter 20
Both ends of a quartz tube (Toshiba Ceraminx) with a length of 50L3 were covered with lids, and the mixture was poured into a quartz tube and gelatinized while rotating at 800 rpm. This was dried at 60°C for 5 days and heated to 1400°C.
A quartz-based optical fiber was obtained by heating to ℃, vitrifying it, and solidifying it. When 50 fibers were manufactured according to the same procedure, the yield was 85%.
得られた光ファイバの赤外域での吸収スペクトルによる
ＯＨ基の含有量を測定したところ２．７μｍでの吸収ピ
ークが全く認められず、ｌｐｐｍ以下であることが確認
された。また損失値は１０ｄ ｍ ／ ｋｍ程度である
が、シングルモードのステップ構造となっていることが
％ＩＬ’２された。When the OH group content of the obtained optical fiber was measured by absorption spectrum in the infrared region, no absorption peak at 2.7 μm was observed, and it was confirmed that the content was less than 1 ppm. Furthermore, although the loss value was about 10 d m / km, %IL'2 showed that it had a single mode step structure.
〔実施例３〕
エチルシリケート１０４．０ｇに０．２Ｎ塩酸３６ｇを
加え十分に攪拌を行ない加水分解を完了させた。これに
平均粒径０，０５μｍのゲルマニア微粒子を１．７ｇ加
えて十分に混合し０．４Ｎアンモニア水を使用して４．
７にｐ Ｈｊｌｌ整を行なった後直径２０、長さ５０ｃ
Ｍの石英管中に１０ｍ１入れ、両端にフタをして、１５
００ｒｐｍで回転させながらゲル化させた。これを８０
℃で２日間乾燥させて、１４００℃まで加熱し、ガラス
化した後中実化を行ない石英系光ファイバ母材を得た。[Example 3] 36 g of 0.2N hydrochloric acid was added to 104.0 g of ethyl silicate and sufficiently stirred to complete hydrolysis. 4. Add 1.7g of germania fine particles with an average particle size of 0.05μm to this, mix thoroughly, and use 0.4N ammonia water.
After adjusting pH to 7, the diameter is 20 and the length is 50 cm.
Pour 10ml into an M quartz tube, cover both ends, and add 15ml.
The gel was formed while rotating at 00 rpm. This is 80
It was dried for two days at .degree. C., heated to 1,400.degree. C., vitrified, and solidified to obtain a quartz-based optical fiber preform.
同様な手順に従って５０本のファイバを作製したところ
、歩留り７５％で作製できた０本ファイバは、シングル
モードのステップ構造を持っていることが確認された。When 50 fibers were produced according to the same procedure, it was confirmed that 0 fibers produced with a yield of 75% had a single-mode step structure.
〔実施例４〕
エチルシリケート６２．１ｇに０．５Ｎ塩酸２１．５ｇ
を加え加水分解を終了させた０次にエチルシリケート１
４４．９ｇ、無水エタノール１８３．３ｇ、２９％アン
モニア水５．６ｇ、水５０゜１ｇを混合し、２時間激し
く攪拌した後、冷暗所にて熟成し、シリカ微粒子を成長
させた、この溶液を減圧濃縮した後、乾燥工程の歩留り
を上げるために濃縮液のアルコール分を水と部分的に置
換した。その後、加水分解溶液を混合した際に急激なゲ
ル化を起こさないようにｐＨ値を２規定の塩酸を用いて
４゜Ｏに調整し、さらに１．０μｍのメンブランフィル
タ−を用いて濾過し平均粒系０゜２８μｍのシリカ微粒
子の分散溶液を作り、前記加水分解溶液と混合しゾルと
した。[Example 4] 21.5 g of 0.5N hydrochloric acid to 62.1 g of ethyl silicate
The zero-order ethyl silicate 1 was added to complete the hydrolysis.
44.9 g, anhydrous ethanol 183.3 g, 29% ammonia water 5.6 g, and 50° 1 g of water were mixed, stirred vigorously for 2 hours, and then aged in a cool dark place to grow fine silica particles. After concentration, the alcohol content of the concentrate was partially replaced with water in order to increase the yield of the drying process. After that, the pH value was adjusted to 4°O using 2N hydrochloric acid to prevent rapid gelation when the hydrolyzed solution was mixed, and then filtered using a 1.0 μm membrane filter to obtain an average A dispersion solution of fine silica particles with a grain size of 0° and 28 μm was prepared and mixed with the hydrolyzed solution to form a sol.
ゾル−ゲル法によりホウ素がシリカに対して１０％入っ
ている直径２０ｎ、内径１０鵞１、長さ５０口の石英管
を作製し、内部を十分に洗浄し乾燥させた。前記ゾルを
、０．２Ｎアンモニア水と水を使用してｐＨ値を５．０
にし、かつ全量を２００ｍ１に調整した後その４ｒｒ＋
ｊ！をとり、石英管中に入れ１１０００ｒｐで回転させ
ながら回転させた。これを４０℃で６日間で乾燥させて
、１３００℃まで加熱しガラス化させてから中実化を行
ない石英系光ファイバ母材を得た。同様の手順に従って
５０本のファイバを作製したところ、歩留り８０％で作
製できた。A quartz tube containing 10% boron relative to silica and having a diameter of 20 nm, an inner diameter of 10 mm, and a length of 50 holes was prepared by the sol-gel method, and the inside was thoroughly cleaned and dried. The pH value of the sol was adjusted to 5.0 using 0.2N ammonia water and water.
and after adjusting the total volume to 200ml, the 4rr+
j! was placed in a quartz tube and rotated at 11,000 rpm. This was dried at 40° C. for 6 days, heated to 1300° C. to vitrify it, and then solidified to obtain a quartz-based optical fiber preform. When 50 fibers were manufactured according to the same procedure, the yield was 80%.
得られたファイバは、赤外域での吸収スペクトルの測定
から含有量はｌｐｐｍ以下であることが１１！認された
。また得られたファイバを線引きしたところ１ｄＢ／−
以下の損失であることが確認された。Measurement of the absorption spectrum in the infrared region showed that the content of the obtained fiber was less than lppm11! It has been certified. Also, when the obtained fiber was drawn, it was 1 dB/-
The following losses were confirmed.
〔実施例５〕
エチルシリケート２０７ｇ、０．２Ｎ＠酸２６゜８ｇと
エタノール７０ｇを加え、十分に攪拌しながら加水分解
を行なった０次にテトラエトキシゲルマニウム７．５ｇ
を加え十分に攪拌し反応させた後、水４４．７ｇを加え
加水分解を終了させ加水分解液を作製した。[Example 5] 7.5 g of zero-order tetraethoxygermanium was obtained by adding 207 g of ethyl silicate, 26.8 g of 0.2N @ acid, and 70 g of ethanol, and hydrolyzing the mixture with thorough stirring.
After adding and sufficiently stirring to react, 44.7 g of water was added to complete the hydrolysis and a hydrolyzed solution was prepared.
ゾル−ゲル法により作製された直径２０ｎ、内径１０ｍ
、長さ５０ｃＩｍの石英管を十分に洗浄し、よく乾燥さ
せたものを前記加水分解液にひたした後ひきあげ外面に
ついたゾルをとり除いた１両端をサランラップでおおっ
て５０℃の温度でゲル化させた。つづいて７０℃で４日
間乾燥した後、１３００℃まで加熱してガラス化したも
のを中実化することにより石英ガラス系光ファイバ用母
材を得た。Diameter 20n, inner diameter 10m manufactured by sol-gel method
A quartz tube with a length of 50 cIm was thoroughly washed and dried, immersed in the hydrolysis solution, pulled up, the sol attached to the outer surface removed, and both ends covered with Saran wrap to gel at a temperature of 50°C. I let it happen. Subsequently, it was dried at 70° C. for 4 days, and then heated to 1300° C. to form a solid material, thereby obtaining a base material for a silica glass optical fiber.
同様の手順により５０本のファイバを作製したところ、
歩留りは９０％であった。When 50 fibers were produced using the same procedure,
The yield was 90%.
含有ＯＨ基はｌｐｐｍ以下であり、損失値は１ｄＢ／−
以下であった。The content of OH groups is less than 1 ppm, and the loss value is 1 dB/-
It was below.
〔実施例６〕
実施例１で作製されたゾルに、十分に洗浄された実施例
１の石英管をひたした後ひきあげ外面についたゾルをと
り除いた０両端をサランラップでおおった後４０℃の温
度でゲル化させた。つづいて６０℃で７日間乾燥を行な
い、１４００℃まで加熱してガラス化したものを中実化
することにより石英ガラス系光ファイバ用母材を得た。[Example 6] The quartz tube of Example 1, which had been thoroughly cleaned, was immersed in the sol prepared in Example 1, pulled up, the sol attached to the outer surface was removed, and both ends were covered with Saran wrap. gelatinized at temperature. Subsequently, it was dried at 60° C. for 7 days, heated to 1400° C., vitrified, and solidified to obtain a base material for a silica glass optical fiber.
同様の手順により５０本のファイバを作製したところ、
歩留りは９５％であった。When 50 fibers were produced using the same procedure,
The yield was 95%.
含有ＯＨ基はｌｐｐｍ以下であり損失は１ｄＢ／−以下
であった。The content of OH groups was 1 ppm or less, and the loss was 1 dB/- or less.
以上のように既存の石英管、あるいはゾル−ゲル法によ
り作製された石英管を使用することにより容易に石英系
光ファイバ用母材を作製できることが確認された。As described above, it has been confirmed that a base material for a quartz-based optical fiber can be easily produced by using an existing quartz tube or a quartz tube produced by the sol-gel method.
上述の如く、本発明の製造工程によれば、ガラス化され
た石英管の内面に薄いコアをゾル−ゲル法によりつくる
ことにより、高品質の光ファイバ用母材を比較的安価に
かつ容易に短期間で作製できるようになる、したがって
大量生産やコストダウンなどに多大な効果がある。As described above, according to the manufacturing process of the present invention, by creating a thin core on the inner surface of a vitrified quartz tube using the sol-gel method, it is possible to easily produce a high-quality optical fiber base material at a relatively low cost. It can be manufactured in a short period of time, and therefore has a great effect on mass production and cost reduction.
以 上that's all
Claims (2)
るいは含まない石英管の内面に、有効ガラス成分を０．
１ｇ／ｍｌ以上含み、かつそのうちの０〜１００％が平
均粒径０．０１〜０．１μｍの範囲の微粒子であるゾル
を、薄く、均一につけたのちゲル化させ乾燥・焼結を行
ない、その後中実化することを特徴とする石英系光ファ
イバ用母材の製造方法。(1) An effective glass component is added to the inner surface of a quartz tube with or without a dopant for changing the refractive index.
A sol containing 1 g/ml or more and of which 0 to 100% are fine particles with an average particle size of 0.01 to 0.1 μm is applied thinly and uniformly, then gelled, dried and sintered, and then A method for manufacturing a base material for a silica-based optical fiber, characterized by solidification.
する際に、石英管の軸にそって回転することを特徴とす
る特許請求の範囲第１項記載の石英系光ファイバ用母材
の製造方法。(2) The method for manufacturing a quartz-based optical fiber preform according to claim 1, characterized in that the quartz tube is rotated along the axis of the quartz tube when coating or drying the sol. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13348486A JPS62292651A (en) | 1986-06-09 | 1986-06-09 | Production of base material for quartz optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13348486A JPS62292651A (en) | 1986-06-09 | 1986-06-09 | Production of base material for quartz optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62292651A true JPS62292651A (en) | 1987-12-19 |
Family
ID=15105848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13348486A Pending JPS62292651A (en) | 1986-06-09 | 1986-06-09 | Production of base material for quartz optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62292651A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0520402A2 (en) * | 1991-06-24 | 1992-12-30 | Sumitomo Electric Industries, Ltd | Method for producing glass preform for optical fiber |
-
1986
- 1986-06-09 JP JP13348486A patent/JPS62292651A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0520402A2 (en) * | 1991-06-24 | 1992-12-30 | Sumitomo Electric Industries, Ltd | Method for producing glass preform for optical fiber |
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