JPS59107939A - Covering glass for optical fiber - Google Patents
Covering glass for optical fiberInfo
- Publication number
- JPS59107939A JPS59107939A JP58223579A JP22357983A JPS59107939A JP S59107939 A JPS59107939 A JP S59107939A JP 58223579 A JP58223579 A JP 58223579A JP 22357983 A JP22357983 A JP 22357983A JP S59107939 A JPS59107939 A JP S59107939A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- optical fiber
- water resistance
- less
- coating
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/42—Coatings containing inorganic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Glass Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光フアイバー用被覆ガラスに係り、特に芯ガラ
スと被覆ガラスとから形成される光フアイバー用被覆ガ
ラスの改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coated glass for an optical fiber, and more particularly to an improvement in a coated glass for an optical fiber formed from a core glass and a coated glass.
一般に光ファイバーは芯の周囲にそれよりも小さい屈折
率を有する被覆層が設けられて成るものでファイバーの
一端から芯に入射させた光情報を、芯と被覆との境界面
での全反射を利用して芯内に閉じ込めファイバーの他端
へ伝えようとするものである。Generally, optical fibers are made up of a core and a coating layer with a smaller refractive index around the core, and optical information incident on the core from one end of the fiber is utilized by total reflection at the interface between the core and the coating. The idea is to confine it within the core and transmit it to the other end of the fiber.
ところで従来、この種の光７アイノ々−例えば光通信用
多成分系ガラスファイバーとしてＮａ、０２０％、Ｃ８
０９％および５ｉ０２７１％（いずれも重量比）からな
る芯ガラスに、Ｎａ２０２２％、ＣａＯ３，５％および
５ｉ０２７４．５％（いずれモｆＥ量比）からなる被覆
ガラスを被覆したものが用いられている。しかしこのガ
ラスファイバーにおいてはアルカリ含有量が多いため低
損失化し易い反面、アルカリ成分が外部に溶出し易いた
め耐水性および耐候性が劣ると云り欠点がある。By the way, in the past, this type of optical 7-i--for example, Na, 020%, C8 as a multi-component glass fiber for optical communication.
A core glass consisting of 09% and 5i0271% (both weight ratios) is coated with a coating glass consisting of 2022% Na2, 5% CaO3, and 4.5% 5i0274.5% (all weight ratios). However, since this glass fiber has a high alkali content, it is easy to reduce loss, but on the other hand, the alkali component tends to be eluted to the outside, so it has a disadvantage of poor water resistance and weather resistance.
本発明者等は上記欠点を解消するために鋭意研究を重ね
た結果、被覆材料としてＳ １０ｘ 、アルカリ金属酸
化物、ＡＩ’＊ Ｏｓ 、Ｂｔ Ｏｓおよびｚｎｏ 。The inventors of the present invention have conducted extensive research to solve the above-mentioned drawbacks, and as a result, S 10x , alkali metal oxides, AI'*Os, BtOs, and zno were used as coating materials.
ＺｒＯ２、ＴＩＯ，のうちから選ばれた少なくとも１種
の成分を含み、かつこれらの成分値を規定した被覆ガラ
スを使用することによって、アルカリ成分の外部溶出を
少くシ、耐水性および耐候性の優れている光フアイバー
用被覆ガラスが得られること、およびこの光７アイバー
用被覆ガラスを用いて光フアイバー用芯ガラスを被覆す
ることにより、耐水性、耐候性の優れた光ファイバーが
得られることを見い出した。By using coated glass that contains at least one component selected from ZrO2 and TIO, and with specified values for these components, external elution of alkali components is reduced, and excellent water resistance and weather resistance are achieved. We have discovered that an optical fiber coating glass with excellent water resistance and weather resistance can be obtained by coating an optical fiber core glass with this optical fiber coating glass. .
本発明は上記の知見に基いてなされたもので、その目的
とするところは耐水性および耐候性の優れた光フアイバ
ー用被覆ガラスを提供するにある。The present invention has been made based on the above findings, and its object is to provide a coated glass for optical fibers having excellent water resistance and weather resistance.
本発明による光フアイバー用被覆ガラスは重量比にてＳ
ｉＯ，６０〜８０％、アルカリ金属酸化物９〜１７％、
Ａ為Ｏｓ ｏ、 ５〜１０％、Ｂｔｕｓ １０％以下（
ただし０を含まず）およびｚｎＯｙ Ｚｒ０ｚ＋Ｔ ｉ
Ｏ，の９ちから選ばれた少なくとも１種７％以下（但
し０を含まず）を含むことを特徴とするものである。The coated glass for optical fiber according to the present invention has a weight ratio of S
iO, 60-80%, alkali metal oxide 9-17%,
A, 5-10%, Btus 10% or less (
However, 0 is not included) and znOy Zr0z+T i
It is characterized by containing 7% or less (however, not including 0) of at least one selected from the following 9.
さらにまた本発明による光フアイバー用被覆ガラスは、
重量比にて８１０．６０〜８０％、アルカリ金属酸化物
９〜１７％、人為０．０．５〜１０％、Ｂ、０．１０％
以下（但し０を含まず）、Ｚｎ０゜７、 ｒ ０２ ｒ
Ｔ ’ ｏ、のうちから運ばれた少なくとも１種７％
以下（但し０を含まず）およびＭｇ０４％以下を含むこ
とを特徴とするものである。Furthermore, the coated glass for optical fiber according to the present invention includes:
Weight ratio: 810.60-80%, alkali metal oxide 9-17%, artificial 0.0.5-10%, B, 0.10%
Below (not including 0), Zn0゜7, r 02 r
At least one species transported from T'o, 7%
It is characterized by containing the following (but not including 0) and Mg04% or less.
次に本発明において光フアイバー用被覆ガラスの各成分
値を前記の如く駆足した理由について述べる。Next, the reason why the values of each component of the coated glass for optical fiber in the present invention are set as described above will be described.
（１） Ｓ ｉ Ｏ。(1) S i O.
５１０２は被覆の骨格を形成するものであり、その含有
量が６０重量％未満では耐水性が低下し、−万８０重量
％を超えると、高温粘性が増加するので好ましくない。5102 forms the skeleton of the coating, and if its content is less than 60% by weight, water resistance will decrease, and if it exceeds -80% by weight, high temperature viscosity will increase, which is not preferable.
（２）Ａｚｔｏｓ
Ａ＾Ｏｓは耐水性の改善効果を有するものである。Ａ７
！１０．の含有量が０．５重量％未満では所期の効果が
充分達成できず、かといって１０重量％を超えると失透
し易くなるからである。(2) Aztos A^Os has the effect of improving water resistance. A7
! 10. If the content is less than 0.5% by weight, the desired effect cannot be fully achieved, whereas if it exceeds 10% by weight, devitrification tends to occur.
（３）アルカリ金属酸化物
アルカリ金属酸化物は主にＮａｔＯ、Ｋ、０ ＊Ｌ ｉ
！Ｏからなり、網目修飾酸化物として作用する。(3) Alkali metal oxides Alkali metal oxides are mainly NatO, K, 0 *L i
! It consists of O and acts as a network-modifying oxide.
アルカリ金属酸化物の含有量が９重量％未ｉでは失透し
易くなり、１７重量％を超えると耐水性が低下し所期の
要求を満たす被覆が得られない。If the alkali metal oxide content is less than 9% by weight, devitrification tends to occur, and if it exceeds 17% by weight, water resistance decreases and a coating that satisfies the desired requirements cannot be obtained.
（４） ＢｚＯａ
Ｂｔｕｓは耐水性の改善、屈折率の向上に寄与し、被覆
ガラスとして所定の屈折率を得る為に１０重量％以下含
有させる事が好まし０゜
（５）ＺｎＯ、ＺｒＯ，、Ｔｉ０１
これら酸物の添加は、特に耐水性の改善に効果がある。(4) BzOa Btus contributes to improving water resistance and refractive index, and is preferably contained at 10% by weight or less in order to obtain a predetermined refractive index as a coated glass. (5) ZnO, ZrO, Ti01 Addition of these acids is particularly effective in improving water resistance.
しかしてこの成分は１種もしく）ヨ２檻以上の混合系で
もよい。この添加量を増すとともに効果も増加するが７
％以上の添力ａｔよ、脈理が生じる。However, the lever component may be one kind or a mixture of two or more components. As the amount of this addition increases, the effect also increases, but 7
% or more, striae occur.
次に本発明による光７アイノクー用被覆プラスを用いて
光７アイノクー用芯ガラスを被覆して光情報を伝送する
光ファイ／々−を形成する実施例について説明する。本
発明による光ファイノ々−用被覆ガラスにより被覆され
る光７フイノ々−用芯ガラスとしては、例えば屈折率、
膨張係数、高温粘性および失透傾向等の緒特性が所望の
光ファイバーを形成するのに適しているものであれば、
任意の成分を有する光ファイノ々−用芯ガ２スを用いる
ことができることは勿論であるが、この実施例において
は光７アイノ々−用芯ガラスとして例えば重量比にて５
ｉｎ２３５〜゛６５％（このうち３０％以内はＣａＯ２
で置換してもよい）とアルカリ金属酸化物１０〜２３％
と、ＣａＯ２〜１２％およびＢａＯ３〜３５％の少くと
も１種とを含む芯ガラスを用い、この芯ガラスを本発明
による被覆ガラスにて被覆して形成する光ファイバーに
ついて説明スル。Next, an embodiment will be described in which the core glass for the Optical 7 Inocou is coated with the Coating Plus for the Optical 7 Inocou according to the present invention to form an optical fiber for transmitting optical information. The core glass for optical fibers coated with the coating glass for optical fibers according to the present invention includes, for example, a refractive index,
If the properties such as expansion coefficient, high temperature viscosity and devitrification tendency are suitable for forming the desired optical fiber,
Of course, it is possible to use a core glass for optical fibers having any component, but in this embodiment, for example, a core glass for optical fibers having a weight ratio of 5.
in235~65% (within 30% is CaO2
) and alkali metal oxides 10-23%
An optical fiber formed by using a core glass containing at least one of 2 to 12% of CaO and 3 to 35% of BaO and covering this core glass with the coating glass according to the present invention will be explained.
表１〜表２に示す如く、組成割合がそれぞれ異なる光フ
アイバー用芯ガラスおよび本発明による被覆ガラスを二
重ルツが法により、８００〜１０００℃の温度下で線引
きして１０種の光フアイパー（芯径８０μ、被覆径１５
０μ）を得た。As shown in Tables 1 and 2, core glasses for optical fibers and coated glasses according to the present invention having different composition ratios were drawn by the double ruts method at a temperature of 800 to 1000°C to form 10 types of optical fibers. Core diameter 80μ, coating diameter 15
0 μ) was obtained.
しかして、得られた各党ファイバーの芯及び被覆におけ
る屈折率（ｎ）、熱膨張係数（α）、耐水性、耐風化性
、１０’、１０’ｔｌＯ’ポイズになる温度、並びに失
透傾向を調べた。その結果を同表１〜表２に併記した。Therefore, the refractive index (n), thermal expansion coefficient (α), water resistance, weathering resistance, temperature at 10', 10'tlO' poise, and devitrification tendency in the core and coating of each of the obtained fibers were determined. Examined. The results are also listed in Tables 1 and 2.
なお、耐水性、耐風化性、及び失透傾向は次のような試
験により求めた。In addition, water resistance, weathering resistance, and devitrification tendency were determined by the following tests.
１）耐水性；目開き０．５ＵのＪＩＳ標準篩にパスし、
目開き０．３１１５の同標準−にパスしない粉末試料５
．０ｇを１００ ？−７の蒸留水に浸し沸騰浴中で１時
間加熱した後、その溶液を０．０ＩＮ−ＨＣＩ、溶液で
滴定し、その滴定した量（仇りで耐水性の優・劣を求め
る。1) Water resistance: Passes through a JIS standard sieve with a mesh size of 0.5U,
Powder sample 5 that does not pass the same standard with a mesh size of 0.3115
．． 0g to 100? After soaking in distilled water of -7 and heating in a boiling bath for 1 hour, titrate the solution with 0.0 IN-HCI solution and determine the superiority or inferiority of water resistance based on the titrated amount.
２）耐風化性＝ガラス表面にできるヘイズ（Ｈａｚｅ）
を観察し、
８に−１６よりヘイズのできにくいものを ＡＳＫ−
１６と同程度のものを ＡＢＳＫ−１６より
ヘイズのでき易いものな Ｂ３）失透傾向二８００
℃で１５時間加熱、並びに１１００℃で１５時間加熱し
て
結晶の析出しないものを ８表面に結晶を
析出するものを ５表面及び内部に結晶を析出
するものを Ｃと評価する。2) Weathering resistance = Haze that forms on the glass surface
ASK-
16 is more likely to cause haze than ABSK-16 B3) Devitrification tendency 2800
℃ for 15 hours and 1100℃ for 15 hours, and no crystals precipitate. 8. Crystals precipitate on the surface. 5. Crystals precipitate on the surface and inside. C.
表１〜表２の実施例１〜実施例７にはそれぞれ本発明に
よる光フアイバー用被覆ガラスの成分、成分値および特
性が示されている゛。これらのものを従来の光フアイバ
ー用被覆ガラスと比較するために、例えば特願昭５２−
１５４５３５号（特開昭５４−８７２３６号）公報中に
記載された表１〜表２の各実施例１〜実施例７の各被覆
ガラスの成分、成分値および特性がそれぞれ表３に参考
例１〜参考例９として示されている。Examples 1 to 7 in Tables 1 and 2 show the components, component values, and characteristics of the coated glass for optical fiber according to the present invention, respectively. In order to compare these with conventional coated glasses for optical fibers, for example,
Table 3 shows the components, component values, and characteristics of each coated glass of Examples 1 to 7 in Tables 1 to 2 described in JP-A No. 154535 (Japanese Unexamined Patent Publication No. 54-87236). - Shown as Reference Example 9.
これらの参考例１〜参考例９に示された被覆ガラスの成
分は本発明における表１〜表２の実施例１〜実施例７に
示された被覆、ガラスの成分中のＺ ｎ Ｏｐ Ｚ ｒ
０１ ＋ Ｔ ｉ Ｏ宏のうちから選ばれた少なくと
も１種の代りにこれと同量のｓｉｏ、で置換したものに
相当するものである。これらの表１〜表３から本発明に
よる光ファイノ々−用被覆ガラスは従来のものと比較し
て特に耐水性が優れていることがわかる。The components of the coated glass shown in these Reference Examples 1 to 9 are Z n Op Z r in the coating and glass components shown in Examples 1 to 7 of Tables 1 to 2 in the present invention.
01 + T i O Hiroshi is replaced with the same amount of sio. From Tables 1 to 3, it can be seen that the coated glass for optical fibers according to the present invention has particularly excellent water resistance compared to the conventional glass.
さらにまた表１〜表２には本発明による光フアイバー用
被覆ガラスにさらにＭｇ０４％以下を含ませることによ
り耐水性に変化をもたらすことなく、さらに耐風化性も
向上することが示されている。Furthermore, Tables 1 and 2 show that by further containing 04% or less Mg in the coated glass for optical fiber according to the present invention, the weathering resistance is further improved without causing a change in water resistance.
なお前記表１〜表２に示された各成分はそれぞれ本発明
の一実施例を示すものであり、本発明による光フアイバ
ー用被覆バラスはこれらのものに限定されないこと明ら
かである。さらに本発明による光フアイバー用被覆ガラ
スには被覆ガラスの均一性を損なわない範囲でＣａＯを
添加して被覆ガラスの特性を調整したりすることができ
ること勿論である。It should be noted that each component shown in Tables 1 and 2 above represents an example of the present invention, and it is clear that the coated ballast for optical fiber according to the present invention is not limited to these. Furthermore, it goes without saying that CaO can be added to the coated glass for optical fiber according to the present invention to adjust the properties of the coated glass within a range that does not impair the uniformity of the coated glass.
しかして本発明の上記実施例に係る光ファイバーは、伝
送損失が８５０ｍμの波長での測定で、２０ｄＢ／ｋＩ
Ｒ以下であり、低損失の光ファイバーであった。However, the optical fiber according to the above embodiment of the present invention has a transmission loss of 20 dB/kI when measured at a wavelength of 850 mμ.
R or less, and the optical fiber had a low loss.
尚、上記組成のガラスは、二重ルツボ法以外での製法、
例えば、ロッド・イン・チューブ法で紡糸しても、高耐
水性および高耐候性の低損失光ファイノ々−が得られる
。In addition, the glass with the above composition can be manufactured by a method other than the double crucible method,
For example, even by spinning using the rod-in-tube method, low-loss optical fibers with high water resistance and high weather resistance can be obtained.
以上詳述した如く、本発明によれば低損失で耐水性、耐
候性などの耐化学的性質が良好で、とくに被覆からのア
ルカリ溶出が少なく耐候性に優れ、かつ寸法安定性に優
れ、しかも線引き作業時の失透傾向を防止でき、さらに
芯と被覆との屈折率の差が大きい等性能、耐用寿命、損
失を著しく改善した光ファイバーが得られる光フアイバ
ー用被覆ガラスを提供できるものである。As detailed above, the present invention has low loss, good chemical resistance such as water resistance and weather resistance, particularly low alkali elution from the coating, excellent weather resistance, and excellent dimensional stability. It is possible to provide a coated glass for optical fibers that can prevent the tendency of devitrification during drawing operations and further provide an optical fiber with significantly improved performance, service life, and loss, such as a large difference in refractive index between the core and the coating.
Claims (2)
酸化物９〜１７％、ＡＡ、 ０．０．５〜１０％Ｂ、０
．１０％以下（但しＯを含まず）およびＺｎＯ、ＺｒＯ
，、ＴＬＯ，のうちから選ばれた少なくとも１種７％以
下（但し０を含まず）を含むことを特徴とする光フアイ
バー用被覆ガラス０(1) Weight ratio: Sin, 60-80%, alkali metal oxide 9-17%, AA, 0.0.5-10% B, 0
．． 10% or less (excluding O), ZnO, ZrO
Coated glass for optical fiber 0 characterized by containing 7% or less (but not including 0) of at least one selected from , , TLO,
酸化物９〜１７％、Ａ４０３０．５〜１０％１Ｂ２０３
１０％以下（但し０を含まず入ＺｎＯｔＺｒＯ，、’ｒ
ｉｏｔのうちから選ばれた少なくとも１種７％以下（但
し０を含ますンおよびＭｇ０４％以下を含むことを特徴
とする光７アイノ々−用被覆ガラス。(2) Weight ratio: 5iotao to 80%, alkali metal oxide 9 to 17%, A403 0.5 to 10% 1B203
10% or less (excluding 0) ZnOtZrO,,'r
1. A coated glass for Hikari 7 INOs, characterized in that it contains 7% or less (but includes 0 and 4% or less of Mg) of at least one selected from the group consisting of IOT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58223579A JPS59107939A (en) | 1983-11-28 | 1983-11-28 | Covering glass for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58223579A JPS59107939A (en) | 1983-11-28 | 1983-11-28 | Covering glass for optical fiber |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53057118A Division JPS5945617B2 (en) | 1978-05-16 | 1978-05-16 | Weather-resistant multi-component glass fiber for optical communications |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59107939A true JPS59107939A (en) | 1984-06-22 |
| JPS6313947B2 JPS6313947B2 (en) | 1988-03-28 |
Family
ID=16800373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58223579A Granted JPS59107939A (en) | 1983-11-28 | 1983-11-28 | Covering glass for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59107939A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS533352A (en) * | 1976-06-30 | 1978-01-13 | Toshiba Corp | Glass fibre for optical communication |
-
1983
- 1983-11-28 JP JP58223579A patent/JPS59107939A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS533352A (en) * | 1976-06-30 | 1978-01-13 | Toshiba Corp | Glass fibre for optical communication |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6313947B2 (en) | 1988-03-28 |
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