JPH027896B2 - - Google Patents
Info
- Publication number
- JPH027896B2 JPH027896B2 JP59265461A JP26546184A JPH027896B2 JP H027896 B2 JPH027896 B2 JP H027896B2 JP 59265461 A JP59265461 A JP 59265461A JP 26546184 A JP26546184 A JP 26546184A JP H027896 B2 JPH027896 B2 JP H027896B2
- Authority
- JP
- Japan
- Prior art keywords
- cladding
- optical fiber
- germanium oxide
- glass layer
- core
- 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.)
- Expired - Lifetime
Links
- 239000013307 optical fiber Substances 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 20
- 238000005253 cladding Methods 0.000 claims description 16
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 claims description 16
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 16
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000075 oxide glass Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910005793 GeO 2 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明はコア、クラツドが酸化ゲルマニウム系
からなる光フアイバに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical fiber whose core and cladding are made of germanium oxide.
(従来の技術)
光増巾作用のある非線型光学用の光フアイバと
して酸化ゲルマニウム系のものが注目されてい
る。(Prior Art) Germanium oxide-based optical fibers are attracting attention as optical fibers for nonlinear optics that have a light amplification effect.
この種の光フアイバでは高純度化、加工性、耐
侯性などが重要なポイントとなるが、耐侯性につ
いてはやや難点があり、例えば空気に直接触れる
と、その空気中の水分に侵されてクラツド等が白
濁し、強度もかなり劣化する。 High purity, processability, and weather resistance are important points for this type of optical fiber, but there are some difficulties with weather resistance. etc. become cloudy and the strength deteriorates considerably.
もちろん酸化ゲルマニウム系光フアイバもシリ
コーン系などの樹脂により被覆されるが、この有
機樹脂の場合、長期的には空気中の水分を透過し
てしまうので上記の対策として十分でない。 Of course, germanium oxide optical fibers are also coated with a silicone-based resin or the like, but in the case of this organic resin, moisture in the air passes through it in the long term, so this is not sufficient as a countermeasure.
その他、非線型光学用酸化ゲルマニウム系光フ
アイバではコア径の小さいシングルモード光フア
イバとし、光パワーの密度を高めるのがよいとさ
れているが、現状ではコアの小径化とともにクラ
ツドの外径も80μm程度に設定され、そのため接
続作業とか、全般的なハンドリングが不便になつ
ている。 In addition, for germanium oxide optical fibers for nonlinear optics, it is said that it is better to use a single-mode optical fiber with a small core diameter to increase the density of optical power, but currently, along with the smaller core diameter, the outer diameter of the cladding is also 80 μm. This makes connection work and general handling inconvenient.
外径を小さくする他の一つの理由は材料節減に
よりゲルマニウムのコスト高を緩和し、これによ
り光フアイバのコストを下げようとする配慮によ
る。 Another reason for reducing the outer diameter is the desire to reduce the cost of germanium through material savings, thereby lowering the cost of the optical fiber.
(発明が解決しようとする問題点)
本発明は上記従来の問題点である耐侯性の欠
如、外径不足などにつき、特性低下やコストアツ
プ等を招来することなくこれらを解決しようとす
るものである。(Problems to be Solved by the Invention) The present invention attempts to solve the above-mentioned conventional problems such as lack of weather resistance and insufficient outer diameter without causing deterioration of characteristics or increase in cost. .
(問題を解決するための手段)
本発明はコア、クラツドが酸化ゲルマニウムを
主成分とする酸化ゲルマニウム系光フアイバにお
いて、上記クラツドの外周に、そのクラツドと同
等もしくはそれ以上の屈折率を有するシリカガラ
ス系の耐侯性ガラス層が形成されていることを特
徴としてる。(Means for Solving the Problems) The present invention provides a germanium oxide optical fiber whose core and cladding are mainly composed of germanium oxide. It is characterized by the formation of a weather-resistant glass layer.
(作用)
本発明光フアイバの場合、クラツドの外周に耐
侯性のガラス層が形成されているから、該耐侯性
ガラス層を介してその光フアイバが防護できると
ともに外径も大きくなり、しかも耐侯性ガラス層
が酸化ゲルマニウムよりも廉価なシリカガラス系
であることにより、耐侯性の欠如、外径不足等を
解消するのにコストアツプが生じない。(Function) In the case of the optical fiber of the present invention, since a weather-resistant glass layer is formed on the outer periphery of the cladding, the optical fiber can be protected through the weather-resistant glass layer, and its outer diameter can also be increased. Since the glass layer is made of silica glass, which is cheaper than germanium oxide, no increase in cost occurs in solving the problems of lack of weather resistance, lack of outer diameter, etc.
(実施例)
以下本発明の実施例につき、図面を参照して説
明する。(Example) Examples of the present invention will be described below with reference to the drawings.
図において、1はコア、2はクラツド、3はク
ラツド2の外周に形成された耐侯性のガラス層、
4はガラス層3の外周に形成されたプラスチツク
製の被覆層である。 In the figure, 1 is a core, 2 is a cladding, 3 is a weather-resistant glass layer formed on the outer periphery of the cladding 2,
4 is a plastic covering layer formed around the outer periphery of the glass layer 3.
上記におけるコア1、クラツド2は酸化ゲルマ
ニウム系であり、これらは主成分GeO2と屈折率
を設定する成分Sb2O3とアルカリ元素(ガラス安
定成分)などとからなるが、コア1はクラツド2
よりもSb2O3を多く含み、クラツド2よりも屈折
率が高くなつている。 Core 1 and cladding 2 in the above are germanium oxide-based, and these consist of a main component GeO 2 , a component Sb 2 O 3 that sets the refractive index, and an alkali element (glass stabilizing component), but core 1 is based on cladding 2.
It contains more Sb 2 O 3 than Clad 2, and has a higher refractive index than Clad 2.
ガラス層3は耐侯性を有するほか、その屈折率
がクラツド2の屈折率(1.58)と同等かそれより
も高く、熱膨張係数、ガラス転移点、ガラス軟化
点などの熱特性が酸化ゲルマニウム系ガラスとマ
ツチすることが要求される。 In addition to having weather resistance, the glass layer 3 has a refractive index that is equal to or higher than the refractive index of the cladding 2 (1.58), and has thermal properties such as thermal expansion coefficient, glass transition point, and glass softening point that are similar to germanium oxide glass. It is required to match.
これらを満足させるガラス層3としてSiO2を
主成分とし、これにアルミニウム、カルシウム、
鉛、ホウ素、バリウム、アルカリ元素、その他の
添加物が1つ以上添加されているものが望まし
い。 The glass layer 3 that satisfies these requirements has SiO 2 as its main component, and contains aluminum, calcium,
Preferably, one or more of lead, boron, barium, alkali elements, and other additives are added.
ただし、該ガラス層3におけるSiO2の含有量
は0〜90%の範囲が適当であり、これが90%を越
える場合、上記の特性が損なわれる。 However, the content of SiO 2 in the glass layer 3 is suitably in the range of 0 to 90%, and if this exceeds 90%, the above characteristics will be impaired.
被覆層4としては熱硬化性あるいは紫外線硬化
性の樹脂が採用されるが、これの具体的なものと
してシリコーン系のものがあげられる。 A thermosetting or ultraviolet curable resin is used as the coating layer 4, and a specific example thereof is a silicone type resin.
以下本発明のより具体的な実施例を説明する。 More specific examples of the present invention will be described below.
Ba,Zn,Ca,Si,Al,Sb,Mgに、Laまたは
Yを加えた酸化物ガラスパイプを作製したとこ
ろ、このガラスパイプは線膨張係数が(40〜70)
×10-7であり、作業温度900〜1000℃、屈折率
1.615であつた。 When we created an oxide glass pipe by adding La or Y to Ba, Zn, Ca, Si, Al, Sb, and Mg, we found that this glass pipe had a coefficient of linear expansion of (40 to 70).
×10 -7 , working temperature 900~1000℃, refractive index
It was 1.615.
これは前記において要求された特性にきわめて
近い。 This is very close to the properties required above.
このガラスパイプと既成の酸化ゲルマニウム系
光フアイバ母材とをロツドインチユーブ法により
紡糸してコア1の直径が60μm、クラツド2の直
径が80μm、ガラス層3の厚さが35μmの光フアイ
バをつくり、その外周に熱硬化性シリコーン樹脂
製の被覆層4を形成した。 This glass pipe and a ready-made germanium oxide optical fiber base material are spun using the rod inch tube method to produce an optical fiber in which the core 1 has a diameter of 60 μm, the cladding 2 has a diameter of 80 μm, and the glass layer 3 has a thickness of 35 μm. A coating layer 4 made of thermosetting silicone resin was formed on the outer periphery.
こうして得られた光フアイバと、ガラス層3の
ない光フアイバ(従来例)とを比較したところ、
本発明に係る光フアイバは耐侯性、機械的特性の
いずれにおいても従来例を上回つていた。 Comparing the optical fiber thus obtained with an optical fiber without the glass layer 3 (conventional example),
The optical fiber according to the present invention exceeded conventional examples in both weather resistance and mechanical properties.
また、ロツドインチユーブ状態での母材全体の
外径が大きくなることにより、加工率を大きくし
コア径を容易に小さくすることができた。 Furthermore, by increasing the outer diameter of the entire base material in the rod inch-tube state, it was possible to increase the processing rate and easily reduce the core diameter.
(発明の効果)
以上説明した通り、本発明に係る酸化ゲルマニ
ウム系光フアイバは、クラツドの外周にシリカガ
ラス系の耐侯性ガラス層を有するから、該ガラス
層を介して酸化ゲルマニウム系のコア、クラツド
を空気中の水分から防護することができ、したが
つて当該光フアイバの耐久性が増し、しかも耐侯
性ガラス層が酸化ゲルマニウムよりも廉価なシリ
カガラス系であることにより大幅なコストアツプ
が生ぜず、接続やその他のハンドリングが容易と
なる外径寸法、さらにはコアの小径化も満足させ
ることができる。(Effects of the Invention) As explained above, since the germanium oxide optical fiber according to the present invention has a weather-resistant glass layer of silica glass on the outer periphery of the cladding, the germanium oxide core and the cladding can be connected to each other through the glass layer. can be protected from moisture in the air, thus increasing the durability of the optical fiber, and since the weather-resistant glass layer is made of silica glass, which is cheaper than germanium oxide, there is no significant increase in cost. It is possible to satisfy the outer diameter size that facilitates connection and other handling, and furthermore, the reduction in the diameter of the core.
図面は本発明に係る光フアイバの1実施例を示
した断面図である。
1……コア、2……クラツド、3……耐侯性の
ガラス層。
The drawing is a sectional view showing one embodiment of an optical fiber according to the present invention. 1... core, 2... cladding, 3... weather resistant glass layer.
Claims (1)
とする酸化ゲルマニウム系光フアイバにおいて、
上記クラツドの外周に、そのクラツドと同等もし
くはそれ以上の屈折率を有するシリカガラス系の
対候性ガラス層が形成されている酸化ゲルマニウ
ム系光フアイバ。1. In a germanium oxide optical fiber whose core and cladding are mainly composed of germanium oxide,
A germanium oxide optical fiber, wherein a weatherproof glass layer of silica glass having a refractive index equal to or higher than that of the cladding is formed around the outer periphery of the cladding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59265461A JPS61146734A (en) | 1984-12-18 | 1984-12-18 | Germanium oxide series optical fiber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59265461A JPS61146734A (en) | 1984-12-18 | 1984-12-18 | Germanium oxide series optical fiber |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61146734A JPS61146734A (en) | 1986-07-04 |
JPH027896B2 true JPH027896B2 (en) | 1990-02-21 |
Family
ID=17417489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59265461A Granted JPS61146734A (en) | 1984-12-18 | 1984-12-18 | Germanium oxide series optical fiber |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61146734A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01201045A (en) * | 1988-02-05 | 1989-08-14 | Nippon Telegr & Teleph Corp <Ntt> | Germanium oxide based optical fiber and preparation thereof |
EP0387755A1 (en) * | 1989-03-17 | 1990-09-19 | Schott Glaswerke | Catheter system for revascularisation in the human body |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5711848A (en) * | 1980-06-24 | 1982-01-21 | Nippon Telegr & Teleph Corp <Ntt> | Fiber for optical communication |
-
1984
- 1984-12-18 JP JP59265461A patent/JPS61146734A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5711848A (en) * | 1980-06-24 | 1982-01-21 | Nippon Telegr & Teleph Corp <Ntt> | Fiber for optical communication |
Also Published As
Publication number | Publication date |
---|---|
JPS61146734A (en) | 1986-07-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |