JPH0129220Y2 - - Google Patents
Info
- Publication number
- JPH0129220Y2 JPH0129220Y2 JP14328183U JP14328183U JPH0129220Y2 JP H0129220 Y2 JPH0129220 Y2 JP H0129220Y2 JP 14328183 U JP14328183 U JP 14328183U JP 14328183 U JP14328183 U JP 14328183U JP H0129220 Y2 JPH0129220 Y2 JP H0129220Y2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- fluorine
- mol
- core
- glass
- 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
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000013307 optical fiber Substances 0.000 claims description 15
- 229910052731 fluorine Inorganic materials 0.000 claims description 14
- 239000011737 fluorine Substances 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- 238000005253 cladding Methods 0.000 claims description 8
- 239000002019 doping agent Substances 0.000 claims description 7
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 13
- 239000011521 glass Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 4
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910005793 GeO 2 Inorganic materials 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Manufacture, Treatment Of Glass Fibers (AREA)
- Glass Compositions (AREA)
Description
【考案の詳細な説明】 本考案は光フアイバに関する。[Detailed explanation of the idea] The present invention relates to optical fibers.
光フアイバでは石英ガラス（SiO2ガラス）の
屈折率を調整する添加元素（ドーパント）として
主にゲルマニウムが使用されているが、ゲルマニ
ウムは価格が高く、かつ安定供給という点で問題
があり、このため他のドーパントが求められてい
る。 In optical fibers, germanium is mainly used as an additive element (dopant) to adjust the refractive index of silica glass (SiO 2 glass), but germanium is expensive and has problems in terms of stable supply. Other dopants are needed.
かかる他のドーパントの１としてアルミニウム
が候補にあげられるが、石英ガラスにアルミニウ
ムを添加すると石英ガラスが結晶化し易くなるた
め、特性の良い光フアイバは得られないという問
題があつた。 Aluminum is a candidate for such other dopants, but there is a problem in that when aluminum is added to quartz glass, the silica glass tends to crystallize, making it impossible to obtain optical fibers with good characteristics.
本考案はフツ素の添加により石英ガラスを安定
化させることによつて上記問題点を解決しようと
いうもので、これを図面に示す実施例を参照しな
がら説明すると、石英ガラスの屈折率を下げる代
表的な添加元素としてホウ素があるが最近では同
元素に比べて屈折率を下げる効果が大きくかつ
1.55μｍの波長帯域において伝送損失を損わせな
いフツ素が注目されており、光フアイバのクラツ
ドにフツ素を添加する試みが数多く報告されてい
る。 The present invention aims to solve the above problems by stabilizing quartz glass by adding fluorine. This will be explained with reference to the embodiment shown in the drawings. Boron is a commonly used additive element, but recently it has become more effective in lowering the refractive index than other elements.
Fluorine is attracting attention because it does not impair transmission loss in the 1.55 μm wavelength band, and many attempts have been reported to add fluorine to the cladding of optical fibers.
つまりフツ素に関しては、それが石英ガラスに
与える屈折率の効果及び光の透過性にのみ着目し
た研究がなされてきた。 In other words, with regard to fluorine, research has focused only on the effect of fluorine on the refractive index and light transmittance that it has on silica glass.
しかしフツ素には石英ガラスを安定化させると
いう効果もある。 However, fluorine also has the effect of stabilizing quartz glass.
他方前述したように、近年石英系光フアイバに
アルミニウム（Al2O3）を添加する研究がなされ
ているが、結晶化という問題に悩まされている。 On the other hand, as mentioned above, research has been conducted in recent years on adding aluminum (Al 2 O 3 ) to silica-based optical fibers, but this has been plagued by the problem of crystallization.
そこで本考案では、第１図に示すように、コア
１のみまたはコア１及びクラツド２にフツ素を添
加することにより石英ガラスの安定化を図つてい
る。 Therefore, in the present invention, as shown in FIG. 1, silica glass is stabilized by adding fluorine to only the core 1 or to the core 1 and the cladding 2.
気相軸付法で光フアイバを製造する場合、通常
酸水素火炎が用いられるが、この場合にはフツ素
を添加することはできない。 When producing optical fibers by the gas-phase axial mounting method, an oxyhydrogen flame is usually used, but in this case, fluorine cannot be added.
そこで本考案では一酸化炭素ガスと酸素ガスと
の混合火炎を用いるようにし、ガスバーナにこれ
らガスと共に四塩化珪素（SiCl4）、三塩化アルミ
ニウム（AlCl3）、六フツ化イオウ（SF6）を原料
として供給し、回転しながら上昇するターゲツト
棒にガラス微粒子を吹き付け、光フアイバ母材を
作製する。 Therefore, in the present invention, a mixed flame of carbon monoxide gas and oxygen gas is used, and silicon tetrachloride (SiCl 4 ), aluminum trichloride (AlCl 3 ), and sulfur hexafluoride (SF 6 ) are added to the gas burner along with these gases. Glass particles are supplied as a raw material and sprayed onto a rotating target rod to produce an optical fiber base material.
この際、光フアイバ母材のコア部のみまたはコ
ア部及びクラツド部の夫々にドーパントとしての
アルミニウムが最大70モル％、またフツ素が最大
30モル％含有されるようにする。 At this time, aluminum as a dopant is contained at a maximum of 70 mol%, and fluorine is contained at a maximum of 70 mol% in only the core part or each of the core part and cladding part of the optical fiber base material.
The content should be 30 mol%.
より具体的には第２図ａ，ｂに示すように、ア
ルミニウム（Al2O3）がコア部に約６モル％、ク
ラツド部に０モル％含有されるようにし、またフ
ツ素はコア部及びクラツド部の両者に均一に約１
モル％含有されるようにした。 More specifically, as shown in Figures 2a and b, aluminum (Al 2 O 3 ) is contained in the core portion at approximately 6 mol% and the cladding portion is contained in 0 mol%, and fluorine is contained in the core portion. Approximately 1 uniformly on both the
It was made to contain mol%.
尚同図の横軸はコア部Ａ及びクラツド部Ｂの領
域を示し、また同図ａの縦軸はアルミニウムの濃
度dAを示し、同図ｂのそれはフツ素の濃度dFを
示すものとする。 It is assumed that the horizontal axis in the figure indicates the regions of the core part A and the cladding part B, and the vertical axis in the figure a indicates the aluminum concentration dA, and that in the figure b indicates the fluorine concentration dF.
上記のようにして得られた光フアイバ母材をヘ
リウムガス雰囲気中で焼結し、透明ガラス化した
ところ、透明なガラスが得られた。 When the optical fiber base material obtained as described above was sintered in a helium gas atmosphere and made into transparent glass, a transparent glass was obtained.
比較のためアルミニウムを上記と同量ドーフし
た母材を上記と同様にして透明ガラス化したとこ
ろ、白濁失透して透明なガラスが得られなかつ
た。 For comparison, when a base material doped with aluminum in the same amount as above was made into transparent glass in the same manner as above, it became cloudy and devitrified, and no transparent glass could be obtained.
上記のようにして得られた透明ガラスの薄片試
料を作り、干渉顕微鏡で屈折率を測定したところ
コア部が1.461、クラツド部が1.452であつた。 A thin sample of the transparent glass obtained as described above was prepared, and its refractive index was measured using an interference microscope, and the refractive index was 1.461 in the core portion and 1.452 in the cladding portion.
また比屈折率差は約0.6％であつた。 Moreover, the relative refractive index difference was about 0.6%.
この母材を外径125μｍの光フアイバに加工し
損失特性を評価したところ、1.3μｍの波長におい
て2dB／Kmの損失値が得られた。 When this base material was processed into an optical fiber with an outer diameter of 125 μm and its loss characteristics were evaluated, a loss value of 2 dB/Km was obtained at a wavelength of 1.3 μm.
上記のようにしてゲルマニウム（GeO2）の代
りにアルミニウム（Al2O3）を添加した石英系ガ
ラス光フアイバでは、最底損失をもたらす波長が
やや長くなる可能性があり、この場合には、
1.55μｍの波長で0.18〜0.2dB／Kmとされている
ゲルマニウム添加石英系光フアイバの限界最底損
失値よりもさらに小さくなる。 In the silica-based glass optical fiber in which aluminum (Al 2 O 3 ) is added instead of germanium (GeO 2 ) as described above, the wavelength that causes the lowest loss may be slightly longer, and in this case,
This is even smaller than the lowest critical loss value of germanium-doped silica optical fiber, which is 0.18 to 0.2 dB/Km at a wavelength of 1.55 μm.
以上のように本考案においては、石英ガラスを
含んだコアまたはコアとクラツドとのそれぞれに
ドーパントとしてのフツ素を最大30モル％、また
アルミニウムを最大70モル％含有しているので、
屈折率を調整するための添加剤としてゲルマニウ
ムよりも安価でかつ安定供給が可能なアルミニウ
ムを用いてもガラスが結晶化せず安定するため、
特性の良い光フアイバが得られる。 As described above, in the present invention, the core containing quartz glass, or each of the core and the cladding, contains up to 30 mol% of fluorine as a dopant and up to 70 mol% of aluminum as a dopant.
Even if aluminum is used as an additive to adjust the refractive index, which is cheaper than germanium and can be supplied stably, the glass will not crystallize and will remain stable.
An optical fiber with good characteristics can be obtained.
第１図は本考案に係る光フアイバの断面図、第
２図ａはアルミニウム濃度の分布図、同図ｂはフ
ツ素濃度の分布図である。
１……コア、２……クラツド。
FIG. 1 is a sectional view of an optical fiber according to the present invention, FIG. 2a is a distribution diagram of aluminum concentration, and FIG. 2b is a distribution diagram of fluorine concentration. 1... Core, 2... Clad.
Claims (1)
とのそれぞれにドーパントとしてのフツ素を最大
30モル％、またアルミニウムを最大70モル％含有
してなる光フアイバ。 Maximum fluorine as a dopant is added to the core containing silica glass or to the core and cladding.
Optical fiber containing 30 mol% aluminum and up to 70 mol% aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14328183U JPS6052938U (en) | 1983-09-16 | 1983-09-16 | optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14328183U JPS6052938U (en) | 1983-09-16 | 1983-09-16 | optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6052938U JPS6052938U (en) | 1985-04-13 |
| JPH0129220Y2 true JPH0129220Y2 (en) | 1989-09-06 |
Family
ID=30319873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14328183U Granted JPS6052938U (en) | 1983-09-16 | 1983-09-16 | optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6052938U (en) |
-
1983
- 1983-09-16 JP JP14328183U patent/JPS6052938U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6052938U (en) | 1985-04-13 |
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