JPH05147966A - Ultraviolet resistant quartz glass fiber - Google Patents
Ultraviolet resistant quartz glass fiberInfo
- Publication number
- JPH05147966A JPH05147966A JP3100477A JP10047791A JPH05147966A JP H05147966 A JPH05147966 A JP H05147966A JP 3100477 A JP3100477 A JP 3100477A JP 10047791 A JP10047791 A JP 10047791A JP H05147966 A JPH05147966 A JP H05147966A
- Authority
- JP
- Japan
- Prior art keywords
- quartz glass
- core
- fiber
- ultraviolet
- optical fiber
- 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.)
- Granted
Links
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Glass Melting And Manufacturing (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Glass Compositions (AREA)
Abstract
Description
【産業上の利用分野】本発明は紫外線領域において耐紫
外線性に優れた石英ガラスファイバ及びこれの集合した
バンドルファイバに関し、特に医療用バンドルファイバ
として好適な光ファイバに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silica glass fiber having excellent ultraviolet resistance in the ultraviolet region and a bundle fiber in which the silica glass fiber is assembled, and more particularly to an optical fiber suitable as a medical bundle fiber.
【従来の技術】光ファイバ特に石英からなる光ファイバ
は、可視光域での使用は勿論紫外線領域でも使用されて
いる。従来の紫外線領域用光ファイバのコア材としては
ＯＨ基を含有し、実質的にフッ素が含有されていない
（塩素は含有されていてもいなくてもよい）組成の石英
ガラスが使用されてきた。特にＯＨ基を積極的に含有さ
せることを大きな特徴としているもので、このコア材は
出力が大きく初期特性が優れているという特徴を有して
いる。しかしながら紫外線劣化特性（即ち紫外線により
コア材が劣化してしまう性質）は概して優れているとは
言い難く、特に２１５μｍの波長域においては該特性は
不充分である。一方可視光線領域において使用されてき
た光ファイバの石英ガラスコア材については、原子力用
等放射線の照射を受ける分野での使用が益々広がり、近
年この領域での光ファイバとして特に耐放射線特性が強
く要望されるようになっている。このような背景におい
て本発明者は可視光線領域において使用する新しい光フ
ァイバとして、更に詳しくは該光ファイバの石英ガラス
コア材として特にフッ素を積極的に含有せしめ、塩素と
ＯＨ基とを実質的に含有させない組成のコア材を開発し
た。このコア材は可視光線領域では極めて優れた耐放射
線性を示すが、紫外線領域で用いると初期特性が小さ
く、出力が小さいという難点があり、特に２５０μｍ以
下においては実質的に使用できないという難点がある。2. Description of the Related Art Optical fibers, especially optical fibers made of quartz, are used not only in the visible light region but also in the ultraviolet region. Quartz glass having a composition containing an OH group and containing substantially no fluorine (which may or may not contain chlorine) has been used as a core material of a conventional optical fiber for the ultraviolet region. In particular, the major feature is to positively contain an OH group, and this core material has a feature that the output is large and the initial characteristics are excellent. However, it is hard to say that the ultraviolet ray deterioration characteristic (that is, the property that the core material is deteriorated by ultraviolet rays) is generally excellent, and the characteristic is insufficient particularly in the wavelength range of 215 μm. On the other hand, the silica glass core material for optical fibers that has been used in the visible light region is increasingly used in the fields that receive radiation such as nuclear power, and in recent years, radiation resistance characteristics have been particularly strongly demanded for optical fibers in this region. It is supposed to be done. Against this background, the present inventor has made a new optical fiber used in the visible light region, more specifically, as a silica glass core material of the optical fiber, particularly positively containing fluorine to substantially contain chlorine and OH groups. We have developed a core material that does not contain it. This core material exhibits extremely excellent radiation resistance in the visible light region, but when used in the ultraviolet region, it has a drawback that the initial characteristics are small and the output is small, and in particular, it cannot be practically used at 250 μm or less. ..
【解決を要すべき課題】本発明者はこの種石英コア材か
らなる光ファイバについて、特にその紫外線領域におけ
る従来の難点を解決するために研究を続け、どのような
組成の石英ガラスがこの目的に合致するかについて研究
してきた。即ち従来の紫外線用コア材はＯＨ基を含有し
ており、初期特性が大きいが紫外線劣化特性は悪く、一
方可視光線領域において耐放射線性に優れたコア材はフ
ッ素を含有しているという特徴があり、このような背景
からコア材として紫外線特性に関して、フッ素、塩素並
びにＯＨ基の含有量が大きく関係しており、これらを適
宜に調節することにより紫外線特性についても最適値が
存在するのではなかろうかとの全く新しい着想に至っ
た。従って本発明の課題はこの新しい着想に基づき、こ
の着想を実際に実現することである。The inventor of the present invention has continued research on an optical fiber made of this kind of quartz core material in order to solve the conventional drawbacks particularly in the ultraviolet region, and what composition of quartz glass is used for this purpose. I have been studying whether or not That is, the conventional ultraviolet core material contains an OH group, and has a large initial characteristic but a bad ultraviolet deterioration characteristic, while the core material excellent in radiation resistance in the visible light region contains fluorine. From such a background, the content of fluorine, chlorine and OH groups is greatly related to the ultraviolet characteristics as the core material, and there is an optimum value for the ultraviolet characteristics by adjusting these appropriately. I got a completely new idea with Kato. The object of the invention is therefore to actually realize this idea, based on this new idea.
【課題を解決するための手段】この課題は石英ガラスコ
アの上にドープド石英ガラスクラッド層を有する光ファ
イバ単独又はこれの多数本が集合した構造のバンドルフ
ァイバであって、該石英ガラスコアの（イ）ＯＨ基含有
量が１０〜１０００ ppm、および（ロ）フッ素含有量が
５０〜５０００ ppmであり、且つ塩素含有量が実質的に
０であるものを使用することによって解決される。An object of the present invention is to provide an optical fiber having a doped silica glass clad layer on a silica glass core alone or a bundle fiber having a structure in which a plurality of the optical fibers are assembled. (A) The problem can be solved by using an OH group content of 10 to 1000 ppm, and (b) a fluorine content of 50 to 5000 ppm and a chlorine content of substantially zero.
【発明の作用】本発明のコア材は上記のごとくＯＨ基と
フッ素とを含有し、塩素が実質的に含まれていないとい
う点に最大の特徴がある。既に述べたごとく従来の紫外
線用コア材はＯＨ基を含有しているが、フッ素は実質的
に含有しておらず、このため初期特性は優れているもの
の紫外線劣化特性に難点を有する。一方耐放射線に優れ
た可視光線用コア材はフッ素を含有することにより耐放
射線が優れたものとなっている。本発明のコア材は従来
の紫外線用コア材のＯＨ基をそのまま含有させ、且つこ
れにフッ素を含有せしめることにより紫外線劣化特性を
向上せしめているものである。そしてこれらフッ素とＯ
Ｈ基とがＯＨ基含有量が１０〜１０００ ppm、及びフッ
素含有量が５０〜５０００ ppmという特定含有量である
場合に優れた耐紫外線特性を示し、特に紫外域における
初期伝達損失の改善と耐紫外線劣化特性に顕著な特性を
示すものとなる。The core material of the present invention is most characterized in that it contains an OH group and fluorine as described above and contains substantially no chlorine. As described above, the conventional UV core material contains an OH group, but it does not substantially contain fluorine. Therefore, although it has excellent initial characteristics, it has a drawback in UV deterioration characteristics. On the other hand, the visible light core material having excellent radiation resistance has excellent radiation resistance because it contains fluorine. The core material of the present invention contains the OH group of the conventional UV core material as it is, and further contains fluorine to improve the UV deterioration characteristics. And these fluorine and O
When the H group and the OH group content are 10 to 1000 ppm and the fluorine content is a specific content of 50 to 5000 ppm, excellent ultraviolet resistance properties are exhibited, and particularly, improvement in initial transmission loss and resistance to resistance in the ultraviolet region are exhibited. The ultraviolet deterioration characteristics are remarkable.
【発明の具体的説明】本発明の光ファイバは大別すると
これが１本の単線ファイバとこの単線ファイバが多数集
合した所謂バンドルファイバに分けられる。図１は単線
ファイバの断面図であり、図１中１は単線光ファイバ、
２はコア層、３はクラッド層、４はサポート層である。
尚サポート層４は必要に応じ設けられる保護層であり、
必ずしも必要ではない。図１に示す単線ファイバ１は、
たとえばコア２となるべき石英ガラス棒の上にクラッド
層３となるべきドープド石英ガラスを外付けし、或いは
クラッド層を内付け後ロッド・イン・チューブ法で得た
３層構造母材のサポート層４をたとえば火炎研磨法によ
り除去してコア２とクラッド層３の２層構造として製造
することができる。本発明のもう一つの形態であるバン
ドルファイバ１０は図２に示すごとく単線ファイバを多
数本束ねて製造される。バンドルファイバ１０は通常図
２に示すごとく出力側１１においては単線ファイバ１を
１列又は２列にして接着剤等適宜な手段で接着し、光源
入射側１２ではこれら単線ファイバ１をほぼ円形状にし
て接着剤等で固着する。そして出力側１１と入射側１２
との中間部１３は単線ファイバ１は夫々未固着で１本１
本バラバラの状態となっている。このためにバンドルフ
ァイバ１０は全体として可撓性があり、その使用に極め
て便利な構造となっている。バンドルファイバにおける
単線ファイバ１の数は使用目的や場所により適宜に決定
されるが、その代表的な具体例としては単線ファイバが
１２〜２４本程度で、長さが１〜３ｍ程度のものであ
る。本発明における単線光ファイバの各コアは、塩素が
実質的に含有されておらず、ＯＨ基含有量が１０〜１０
００ ppm、及びフッ素含有量が５０〜５０００ ppmであ
る純石英ガラスにより構成されることを必須とする。こ
のようなコア用純石英ガラスはたとえば一般式Ｒ1ｎＳ
ｉ（ＯＲ2）4-mで示されるケイ素化合物の少なくとも１
種と、一般式ＣaＨbＦcで示されるフッ素化合物の少な
くとも１種とを酸水素炎で燃焼させ、発生する合成シリ
カ微粒子を回転している耐熱性基体上に堆積させて多孔
質シリカ焼結体にし、これを加熱溶融してガラス化する
合成石英ガラスの製造方法によって製造することができ
る。但しＲ1、Ｒ2は炭素数１〜４のアルキル基、０≦ｍ
≦４、１≦ａ≦３、０≦ｂ≦７、１≦ｃ≦８である。ク
ラッド層３はドーパントとして、たとえばＢ及び／又は
Ｆを含有する石英ガラスにて構成される。このようなド
ープド石英ガラスはたとえばＢＣｌ3 、ＢＦ3 、ＳｉＣ
ｌ4 及び酸素との混合ガス、ＢＣｌ3 、ＳｉＦ4 及び酸
素との混合ガス、或いはＢＦ3 又はＢＣｌ3 とＳｉＦ4
及び酸素との混合ガスなどを原料として用いて、よく知
られた化学気相沈着法（ＣＶＤ法）にて成形することが
できる。上記した原料混合ガスのうち特に好ましいもの
は、ＢＦ3 、ＳｉＣｌ4 及び酸素との混合ガスである。
必要に応じ設けられるサポート層４の構成材料が不純物
を多量に含む石英ガラスであると、耐紫外線線性に数値
上悪影響を及ぼす場合がある。従ってサポート層４の構
成材料としては線引き作業温度が少なくとも１８００℃
の石英ガラス、たとえば天然石英ガラスや合成石英ガラ
スなど、特に純度９９重量％以上の、就中99.9重量％以
上の高純度合成石英ガラスが好ましい。DETAILED DESCRIPTION OF THE INVENTION The optical fiber of the present invention can be roughly classified into one single fiber and a so-called bundle fiber in which a large number of the single fibers are assembled. FIG. 1 is a cross-sectional view of a single wire fiber, where 1 is a single wire optical fiber,
2 is a core layer, 3 is a cladding layer, and 4 is a support layer.
The support layer 4 is a protective layer provided as necessary,
It is not absolutely necessary. The single wire fiber 1 shown in FIG.
For example, a support layer of a three-layer structure base material obtained by a rod-in-tube method after externally attaching a doped quartz glass to be a clad layer 3 onto a quartz glass rod to be a core 2 or after internally attaching a clad layer. 4 can be removed by, for example, a flame polishing method to produce a two-layer structure of the core 2 and the clad layer 3. The bundle fiber 10 which is another embodiment of the present invention is manufactured by bundling a plurality of single-wire fibers as shown in FIG. As shown in FIG. 2, the bundle fiber 10 is usually formed by arranging the single-wire fibers 1 in one or two rows on the output side 11 and adhering them by an appropriate means such as an adhesive, and on the light-incident side 12 the single-fibers 1 are made substantially circular. And fix it with an adhesive. And the output side 11 and the incident side 12
In the intermediate part 13 between and, the single wire fibers 1 are not fixed to each one and one
The book is in a scattered state. For this reason, the bundle fiber 10 is flexible as a whole, and has a structure that is extremely convenient to use. The number of single-wire fibers 1 in the bundle fiber is appropriately determined depending on the purpose of use and location, but a typical example thereof is about 12 to 24 single-wire fibers and a length of about 1 to 3 m. .. Each core of the single-wire optical fiber in the present invention contains substantially no chlorine and has an OH group content of 10 to 10.
It is indispensable to be composed of pure quartz glass having 00 ppm and a fluorine content of 50 to 5000 ppm. Pure silica glass for such a core has, for example, the general formula R 1 nS
At least one silicon compound represented by i (OR 2 ) 4-m
And a fluorine compound represented by the general formula C a H b F c are burned with an oxyhydrogen flame, and the generated synthetic silica fine particles are deposited on a rotating heat-resistant substrate to form porous silica. It can be manufactured by a method of manufacturing a synthetic quartz glass, which is made into a sintered body and is heated and melted to be vitrified. However, R 1 and R 2 are alkyl groups having 1 to 4 carbon atoms, and 0 ≦ m
≦ 4, 1 ≦ a ≦ 3, 0 ≦ b ≦ 7, 1 ≦ c ≦ 8. The cladding layer 3 is made of quartz glass containing, for example, B and / or F as a dopant. Such doped quartz glass is, for example, BCl 3 , BF 3 , SiC.
l 4 and oxygen mixed gas, BCl 3 , SiF 4 and oxygen mixed gas, or BF 3 or BCl 3 and SiF 4
It can be molded by a well-known chemical vapor deposition method (CVD method) by using a mixed gas of oxygen and oxygen as a raw material. Of the above-mentioned raw material mixed gas, particularly preferable one is a mixed gas of BF 3 , SiCl 4 and oxygen.
If the constituent material of the support layer 4 provided as necessary is quartz glass containing a large amount of impurities, the ultraviolet ray resistance may be adversely affected numerically. Therefore, as the constituent material of the support layer 4, the drawing work temperature is at least 1800 ° C.
In particular, high-purity synthetic quartz glass having a purity of 99% by weight or more, especially 99.9% by weight or more, is preferable, such as natural quartz glass or synthetic quartz glass.
【発明の効果】本発明の単線光ファイバ又はこれを多数
束ねたバンドルファイバはこれまで説明した通り、紫外
線領域での特性に優れているので、紫外線用光ファイバ
として、或いはまた医療用として好適なバンドルファイ
バとして極めて有用である。As described above, the single optical fiber of the present invention or a bundle fiber obtained by bundling a plurality of the single optical fibers has excellent characteristics in the ultraviolet region, and is therefore suitable as an optical fiber for ultraviolet rays or medical use. It is extremely useful as a bundle fiber.
【実施例】以下に実施例を示して本発明を詳しく説明す
る。 実施例１ ケイ素化合物としてメチルトリメトキシシラン（ＣＨ3
Ｓｉ（ＯＣＨ3）3）、またフッ素化合物として四フッ化
炭素（ＣＦ4）を使用して、水素ガス７００Ｎｌ／時、
酸素ガス８００Ｎｌ／時、ＣＨ3Ｓｉ（ＯＣＨ2）3５０
０ｇ／時、及びＣＦ40.44ｇ／時で供給して、燃焼反応
させた。生成した合成シリカ微粒子を合成石英製基体上
へ堆積させ、外径６０mm×２３０mmの多孔質シリカ焼結
体を得た。次にこの焼結体をヘリウムガスで大気圧下１
５５０℃で加熱して溶融ガラス化したところ、長さ外径
約３５mm、長さ２００mmの石英ガラス棒を得た。該ガラ
ス棒は塩素含有量 0.1 ppm以下、ＯＨ基含有量は１００
ppm、フッ素含有量１１００ ppm、その他不純物の合計
含有量５ ppmであり、また２０℃における屈折率は1.45
75であった。石英ガラス中の塩素含有量は放射化分析法
により、フッ素含有量は、イオン分析法により測定し、
またＯＨ基含有量はフーリエ変換赤外分光計を用いて波
長2.73μｍにおける吸収損失より求めた。なおＯＨ基含
有量の測定方法について更に若干付言すると、波長2.72
μｍにおけるＯＨ基含有量が０である場合の透過率
（％）をＴ0、被測定物の実際の透過率をＴ1、被測定物
の厚（mm）をＬとすると、下記式１で計算される。EXAMPLES The present invention will be described in detail below with reference to examples. Example 1 As a silicon compound, methyltrimethoxysilane (CH 3
Si (OCH 3 ) 3 ) and carbon tetrafluoride (CF 4 ) as a fluorine compound, hydrogen gas 700 Nl / hr,
Oxygen gas 800 Nl / h, CH 3 Si (OCH 2 ) 3 50
A combustion reaction was carried out by supplying 0 g / hour and 0.44 g / hour of CF 4 . The produced synthetic silica fine particles were deposited on a synthetic quartz substrate to obtain a porous silica sintered body having an outer diameter of 60 mm × 230 mm. Next, this sintered body is helium gas at atmospheric pressure 1
When it was heated at 550 ° C. to be melted and vitrified, a quartz glass rod having an outer diameter of about 35 mm and a length of 200 mm was obtained. The glass rod has a chlorine content of 0.1 ppm or less and an OH group content of 100.
ppm, fluorine content 1100 ppm, total content of other impurities 5 ppm, and the refractive index at 20 ° C is 1.45.
It was 75. Chlorine content in quartz glass is measured by activation analysis method, fluorine content is measured by ion analysis method,
The OH group content was determined from the absorption loss at a wavelength of 2.73 μm using a Fourier transform infrared spectrometer. A little more about the method of measuring the OH group content, the wavelength of 2.72
When the transmittance (%) when the OH group content in μm is 0 is T 0 , the actual transmittance of the measured object is T 1 , and the thickness (mm) of the measured object is L, the following formula 1 is obtained. Calculated.
【式１】 上記の純石英ガラス棒を延伸加工して得た外径１５mmの
コアロッド、並びにＳｉＣｌ4 、ＢＦ3 、Ｏ2 および合
成石英ガラス管（外径２６mm、肉厚 1.5mm、ｎ20：1.45
9 ）を用いてＭＣＶＤ法の適用下に形成したＢ、Ｆ系ド
ープド石英ガラス層（ｎ20：1.4465）を内周に有する該
ガラス管とを用い、ロッド・イン・チューブ法を適用し
て３層構造のプリホーム（外径16.5mm）を得たのちこれ
を加熱（２０００℃）下に線引きして外径２００μｍの
光ファイバを得た。上記の光ファイバ（長さ1.5 ｍ）の
１３本を束ねてバンドル用ファイバを得た。 実施例２〜６、比較例１〜５ 実施例１と同様の方法でコア材のＯＨとＦの含有量を原
料ガス中のＣＦ4量を調剤することにより変え、また更
に比較例４、５、９、１０については原料ガスのメチル
トリメトキシシランに代えて四塩化ケイ素（ＳｉＣ
ｌ4）を使用して塩素量を調節して各種のコア材を作成
し、同様の方法で夫々についてバンドルファイバを作成
した。次に得られた各バンドルファイバの初期特性及び
紫外線劣化特性を調べた。この結果を表１及び表２に示
す。試験方法 図３に示すような方法により測定した。但し図３中２１
はランプ光源、２２はＤ2 ランプ、２３は被測定光ファ
イバ、２４は瞬間測定マルチシステムを示し、夫々は次
のものを使用した。 ランプ光源：「ＰＯＷＥＲ ＳＵＰＰＬＹ Ｃ−１３１
６」 Ｄ2 ランプ：「ＤＥＵＴＥＲＩＵＭＬＡＭＰ ＭＣ ９
６２Ａ」 マルチシステム：「ＭＣＰＤ−１１００」 「ＰＣ−９８０１（パソコン）」[Formula 1] A core rod having an outer diameter of 15 mm obtained by drawing the above pure quartz glass rod, and SiCl 4 , BF 3 , O 2 and synthetic quartz glass tubes (outer diameter 26 mm, wall thickness 1.5 mm, n 20 : 1.45).
9) and a glass tube having a B and F-based doped silica glass layer (n 20 : 1.4465) formed on the inner circumference thereof under the application of the MCVD method, and the rod-in-tube method is applied. After obtaining a layered preform (outer diameter 16.5 mm), this was drawn under heating (2000 ° C.) to obtain an optical fiber with an outer diameter of 200 μm. Thirteen of the above optical fibers (length: 1.5 m) were bundled to obtain a bundle fiber. Examples 2 to 6 and Comparative Examples 1 to 5 In the same manner as in Example 1, the content of OH and F in the core material was changed by adjusting the amount of CF 4 in the raw material gas, and Comparative Examples 4, 5 , 9 and 10 are replaced with silicon trichloride (SiC) instead of methyltrimethoxysilane as a raw material gas.
by adjusting the chlorine content to create a variety of core materials using l 4), and create a bundle fiber for each in the same manner. Next, the initial characteristics and ultraviolet deterioration characteristics of each of the obtained bundle fibers were examined. The results are shown in Tables 1 and 2. Test method Measurement was carried out by the method shown in FIG. However, 21 in FIG.
Is a lamp light source, 22 is a D 2 lamp, 23 is an optical fiber to be measured, and 24 is an instantaneous measurement multi-system. Lamp light source: "POWER SUPPLY C-131
6 "D 2 lamp:" DEUTERIUM AMP MC 9
62A "Multi-system:" MCPD-1100 "" PC-9801 (personal computer) "
【表１】[Table 1]
【表２】実施例７ 表１及び表２に示したバンドルファイバの単線光ファイ
バについて、同様にその特性を測定した。この結果を夫
々表３、表４に示す。Table 2 Example 7 The characteristics of the bundled single fiber optical fibers shown in Table 1 and Table 2 were measured in the same manner. The results are shown in Tables 3 and 4, respectively.
【表３】[Table 3]
【表４】[Table 4]
図１は本発明実施例の単線光ファイバの断面図であり、
図２は同じくバンドルファイバの断面図である。図３は
光ファイバについての大気中での耐紫外線性の試験方法
の説明である。 １ …バンドルファイバ １’…単線光ファイバ ２ …コア ３ …クラッド層 ４ …サポート層 １０…バンドルファイバ １１…出力側 １２…入射側 １３…中間部分FIG. 1 is a sectional view of a single optical fiber according to an embodiment of the present invention,
FIG. 2 is a sectional view of the same bundle fiber. FIG. 3 is an explanation of a test method for ultraviolet resistance of an optical fiber in the atmosphere. DESCRIPTION OF SYMBOLS 1 ... Bundle fiber 1 '... Single line optical fiber 2 ... Core 3 ... Clad layer 4 ... Support layer 10 ... Bundle fiber 11 ... Output side 12 ... Incident side 13 ... Intermediate part
【表１】 [Table 1]
【表１】 [Table 1]
【表２】 [Table 2]
【表２】 [Table 2]
【表３】 [Table 3]
【表３】 [Table 3]
【表４】 [Table 4]
【表４】 [Table 4]
【手続補正書】[Procedure amendment]
【提出日】平成４年１１月６日[Submission date] November 6, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明実施例の単線光ファイバの断面図であ
る。FIG. 1 is a sectional view of a single optical fiber according to an embodiment of the present invention.
【図２】本発明実施例のバンドルファイバの断面図であ
る。FIG. 2 is a sectional view of a bundle fiber according to an embodiment of the present invention.
【図３】光ファイバについての大気中での耐紫外線性の
試験方法の説明である。FIG. 3 is an explanation of a test method for ultraviolet resistance of an optical fiber in the atmosphere.
【符号の説明】 １ …バンドルファイバ １′…単線光ファイバ ２ …コア ３ …クラッド層 ４ …サポート層 １０…バンドルファイバ １１…出力側 １２…入射側 １３…中間部分[Explanation of Codes] 1 ... Bundle fiber 1 '... Single optical fiber 2 ... Core 3 ... Clad layer 4 ... Support layer 10 ... Bundle fiber 11 ... Output side 12 ... Incident side 13 ... Intermediate part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 速水 弘之 兵庫県伊丹市池尻４丁目３番地 三菱電線 工業株式会社伊丹製作所内 (72)発明者 鈴木 光一 兵庫県伊丹市池尻４丁目３番地 三菱電線 工業株式会社伊丹製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Hayami 4-3 Ikejiri, Itami City, Hyogo Prefecture Mitsubishi Cable Industries, Ltd. Itami Works (72) Inventor Koichi Suzuki 4-chome Ikejiri, Itami City, Hyogo Mitsubishi Cable Industries, Ltd. Itami Manufacturing Co., Ltd.
Claims (2)
クラッド層を有する光ファイバからなり、該石英ガラス
コアの（イ）ＯＨ基含有量が１０〜１０００ ppm、及び
（ロ）フッ素含有量が５０〜５０００ ppm、であって且
つ（ハ）該コアが実質的に塩素を含有していないもので
あることを特徴とする耐紫外線性石英ガラスファイバ。1. An optical fiber having a doped silica glass cladding layer on a silica glass core, wherein the silica glass core has (a) OH group content of 10 to 1000 ppm and (b) fluorine content of 50. -5000 ppm, and (c) the ultraviolet-resistant quartz glass fiber, wherein the core is substantially chlorine-free.
耐紫外線性バンドルファイバ。2. An ultraviolet resistant bundle fiber having a structure in which a large number of the optical fibers are assembled.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3100477A JPH089489B2 (en) | 1991-04-04 | 1991-04-04 | UV resistant quartz glass fiber |
| US07/953,787 US5335306A (en) | 1991-04-04 | 1992-09-30 | Ultraviolet resistant silica glass fiber |
| EP92116914A EP0590199B1 (en) | 1991-04-04 | 1992-10-02 | Ultraviolet resistant silica glass fiber |
| DE69227993T DE69227993T2 (en) | 1991-04-04 | 1992-10-02 | Quartz glass fiber resistant to ultraviolet radiation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3100477A JPH089489B2 (en) | 1991-04-04 | 1991-04-04 | UV resistant quartz glass fiber |
| EP92116914A EP0590199B1 (en) | 1991-04-04 | 1992-10-02 | Ultraviolet resistant silica glass fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05147966A true JPH05147966A (en) | 1993-06-15 |
| JPH089489B2 JPH089489B2 (en) | 1996-01-31 |
Family
ID=26131111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3100477A Expired - Lifetime JPH089489B2 (en) | 1991-04-04 | 1991-04-04 | UV resistant quartz glass fiber |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH089489B2 (en) |
| DE (1) | DE69227993T2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0879799A3 (en) * | 1997-05-16 | 1999-07-21 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| JP2001322820A (en) * | 2000-03-06 | 2001-11-20 | Shin Etsu Chem Co Ltd | Fluorine-containing synthetic quartz glass and its manufacturing method |
| US6333283B1 (en) | 1997-05-16 | 2001-12-25 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| EP1179514A1 (en) * | 2000-08-10 | 2002-02-13 | Mitsubishi Cable Industries, Ltd. | Silica optical fiber |
| JP2002333531A (en) * | 2001-05-07 | 2002-11-22 | Mitsubishi Cable Ind Ltd | Large diameter fiber |
| WO2003091774A1 (en) * | 2002-04-26 | 2003-11-06 | Japan Science And Technology Corporation | Fiber grating and method for making the same |
| JP2006046996A (en) * | 2004-08-02 | 2006-02-16 | Fujikura Ltd | Multi-purpose radiation environment monitoring element |
| US7277616B2 (en) | 2002-05-17 | 2007-10-02 | Sumitomo Electric Industries, Ltd. | Optical fiber bundle and method of manufacturing the same |
| JP2007272251A (en) * | 2002-05-17 | 2007-10-18 | Sumitomo Electric Ind Ltd | Optical fiber bundle |
| JP2009011995A (en) * | 2007-07-09 | 2009-01-22 | Shinetsu Quartz Prod Co Ltd | Fibrous photocatalyst, purification apparatus, and method for producing fibrous photocatalyst |
| JP2012196677A (en) * | 2012-07-24 | 2012-10-18 | Shinetsu Quartz Prod Co Ltd | Method for manufacturing fibrous photocatalytic body |
-
1991
- 1991-04-04 JP JP3100477A patent/JPH089489B2/en not_active Expired - Lifetime
-
1992
- 1992-10-02 DE DE69227993T patent/DE69227993T2/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6709997B2 (en) | 1997-05-16 | 2004-03-23 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| US5983673A (en) * | 1997-05-16 | 1999-11-16 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| US6333283B1 (en) | 1997-05-16 | 2001-12-25 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| EP0879799A3 (en) * | 1997-05-16 | 1999-07-21 | Sumitomo Electric Industries, Ltd. | Silica glass article and manufacturing process therefor |
| JP2001322820A (en) * | 2000-03-06 | 2001-11-20 | Shin Etsu Chem Co Ltd | Fluorine-containing synthetic quartz glass and its manufacturing method |
| EP1179514A1 (en) * | 2000-08-10 | 2002-02-13 | Mitsubishi Cable Industries, Ltd. | Silica optical fiber |
| JP2002060248A (en) * | 2000-08-10 | 2002-02-26 | Mitsubishi Cable Ind Ltd | Quartz-base optical fiber |
| US6611650B2 (en) * | 2000-08-10 | 2003-08-26 | Mitsubishi Cable Industries, Ltd. | Silica optical fiber |
| JP2002333531A (en) * | 2001-05-07 | 2002-11-22 | Mitsubishi Cable Ind Ltd | Large diameter fiber |
| WO2003091774A1 (en) * | 2002-04-26 | 2003-11-06 | Japan Science And Technology Corporation | Fiber grating and method for making the same |
| US7277616B2 (en) | 2002-05-17 | 2007-10-02 | Sumitomo Electric Industries, Ltd. | Optical fiber bundle and method of manufacturing the same |
| JP2007272251A (en) * | 2002-05-17 | 2007-10-18 | Sumitomo Electric Ind Ltd | Optical fiber bundle |
| JP2006046996A (en) * | 2004-08-02 | 2006-02-16 | Fujikura Ltd | Multi-purpose radiation environment monitoring element |
| JP4512780B2 (en) * | 2004-08-02 | 2010-07-28 | 株式会社フジクラ | Multipurpose radiation environment monitor element |
| JP2009011995A (en) * | 2007-07-09 | 2009-01-22 | Shinetsu Quartz Prod Co Ltd | Fibrous photocatalyst, purification apparatus, and method for producing fibrous photocatalyst |
| JP2012196677A (en) * | 2012-07-24 | 2012-10-18 | Shinetsu Quartz Prod Co Ltd | Method for manufacturing fibrous photocatalytic body |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69227993D1 (en) | 1999-02-04 |
| DE69227993T2 (en) | 1999-07-15 |
| JPH089489B2 (en) | 1996-01-31 |
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