JPS6011241A - Manufacture of base material for optical fiber - Google Patents
Manufacture of base material for optical fiberInfo
- Publication number
- JPS6011241A JPS6011241A JP11588983A JP11588983A JPS6011241A JP S6011241 A JPS6011241 A JP S6011241A JP 11588983 A JP11588983 A JP 11588983A JP 11588983 A JP11588983 A JP 11588983A JP S6011241 A JPS6011241 A JP S6011241A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- base material
- quartz glass
- core layer
- pipe
- 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
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]
- C03B37/018—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 glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01853—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
発明の技術分野
本発明はＭＣＶＤ法を用いた光７アイ・ｆ母材の製造方
法に関する０
従来技術と問題点
一般に、ＭＣＶＤ法（Ｍｏｄｉｆｉｅｄ Ｃｈｅｍｉｃ
ａｌ ＶａｐｅｒＤｅｐ、ｏａｉｔｉｏｎ ｍｅｔｈｏ
ｄ ）とは石英ガラスの管を回転しつつ（６０〜１００
（ｒｐｍ））ガスを吹き付はバーナの炎で加熱してク
ラッド層とコア層を形成し、光ファイバを製造する方法
である。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method for manufacturing optical 7 eye/f base materials using the MCVD method.
al VaperDep, oaition method
d) means rotating the quartz glass tube (60 to 100
(rpm)) is a method of manufacturing optical fibers by heating gas with a burner flame to form a cladding layer and a core layer.
従来のＭＣＶＤ法はコア層に５ｉＣｔ４ ＊ ＧａＣｌ
２ ＊ｐｏｃｔ、の混合がスを用いて約５０〜１００層
堆積させる方法が一般的であるが、この混合ガス成分中
のＰがバーナ炎中のＨ２Ｏを化合してＯＨが生成される
。The conventional MCVD method uses 5iCt4*GaCl in the core layer.
A common method is to deposit about 50 to 100 layers using a mixed gas of 2*poct, and P in this mixed gas component combines with H2O in the burner flame to generate OH.
このためＯＨ基をｃｔ２ガスと化合させＨＣｌを生成さ
せることによシ除去させていた。しかしこのＣ６２ガス
を用いての脱ＯＨ処理では、長波長帯における低損失に
は限界があり、第１図に示すように屈折率分布が欠ける
という問題があった。For this reason, the OH group was removed by combining it with ct2 gas to generate HCl. However, in this deOH treatment using C62 gas, there is a limit to low loss in a long wavelength band, and there is a problem that the refractive index distribution is lacking as shown in FIG.
発明の目的
本発明の目的は、コア、を堆積後にＧ２Ｃｔ４ 、 Ｃ
１２＊０２の混合ガスを流し込むと共に高温加熱するこ
とによシコアを形成するＰと０２との化合によシ生成し
たＰ２Ｏ５を飛散させ、Ｐ−ＯＨ基の生成を阻止して長
波長帯における低損失化を図ることにある。Object of the invention The object of the invention is to deposit the core, G2Ct4, C
By pouring a mixed gas of 12*02 and heating at high temperature, the P2O5 generated by the combination of P and 02 to form cycor is scattered, preventing the formation of P-OH groups and reducing the low temperature in the long wavelength band. The purpose is to reduce losses.
発明の構成
本発明によれば、ＭＣＶＤ法により石英ガラス管にコア
層を堆積して光ファイノ々母材を製造する方法において
、
上記コア層を一層又は複数層堆積し、次にＧａＣｌ２
＊ ０２及びＣ２２から成る混合ガスを石英ガラス管内
に導入すると共に外部から高温加熱を行い、以上のコア
層堆積と混合ガス導入と高温加熱処理から成る工程を繰
り返すことにより低損失の光フアイバ母材を製造するこ
とを特徴とする光フアイバ母材の製造方法が提供される
。Structure of the Invention According to the present invention, in a method for manufacturing an optical fiber base material by depositing a core layer on a quartz glass tube by the MCVD method, one or more core layers are deposited, and then GaCl2
* A mixed gas consisting of 02 and C22 is introduced into a quartz glass tube and heated at high temperature from the outside, and the above process consisting of core layer deposition, mixed gas introduction, and high temperature heat treatment is repeated to create a low-loss optical fiber base material. Provided is a method for manufacturing an optical fiber preform, which comprises manufacturing an optical fiber preform.
発明の実施例
以下、本発明を実施例により添付図面を参照して説明す
る。Embodiments of the Invention The present invention will now be explained by way of embodiments with reference to the accompanying drawings.
先ず、石英ガラス管にコア層を一層堆積する。First, a core layer is deposited on a quartz glass tube.
この場合に使用する混合ガスは従来と同じ５ｔｃｔ４゜
ＧａＣｌ２ ＊ ＰＯＣ２，５である。The mixed gas used in this case is 5tct4°GaCl2*POC2,5, which is the same as in the conventional case.
次にこの一層を堆積した後、ＧａＣｌ２２ｍｇ／ｍｉｎ
１Ｃ１２０，５／／ｍｉｎ 、 ０２１ ｌ／ｍｉｎ
の混合ガスを上記石英ガラス管内に導入する。同時に、
ノ守−す炎の温度を１７０ （） ［℃）程度の高温に
し、高温加熱処理を行う。Next, after depositing this single layer, GaCl22mg/min
1C120,5//min, 021 l/min
A mixed gas of is introduced into the quartz glass tube. at the same time,
The temperature of the flame is set to a high temperature of about 170° C., and high-temperature heat treatment is performed.
この高温加熱により生成されたＰ２Ｏ５は蒸発し、Ｐが
存在しないのでＰ−ＯＨ基の生成は阻止される。P2O5 produced by this high-temperature heating evaporates, and since P is not present, the production of P-OH groups is inhibited.
また残存しているＯＨ基はＣｌ３と化合してＨＣｌとな
シ除去される。Further, the remaining OH groups are combined with Cl3 to become HCl and removed.
またＰ２Ｏ５の他にＧ ｅ Ｏ２も同時に生成し、との
ＧｅＯ２が高温によシ蒸発し、飛散する。従って堆積さ
れたコア中のＧ ｅ Ｃｌ ４が減少し、屈折率が落ち
込むがこれを補償するために上記Ｇ ｅ Ｃｌ ４を石
英ガラス管内に導入する。In addition to P2O5, G e O2 is also generated at the same time, and GeO2 evaporates and scatters due to the high temperature. Therefore, the G e Cl 4 in the deposited core decreases and the refractive index drops, but in order to compensate for this, the G e Cl 4 is introduced into the quartz glass tube.
この工程をほぼ５０回程度繰シ返した後、石英ガラス管
を圧縮してつぶし光フアイバ母材を形成する。After repeating this process about 50 times, the quartz glass tube is compressed and crushed to form an optical fiber base material.
この製造方法によれば、ＯＨ基を充分除去することがで
きるので第２図に示すように屈折率の分布が階段状にな
り落ち込むことがない。According to this manufacturing method, the OH groups can be sufficiently removed, so that the refractive index distribution does not become stepwise and drop as shown in FIG.
上記光フアイバ母材は紡糸して一本ずつ光ファイバとす
るが、波長１．３９Ｃμｍ〕におけるＯＨ吸収損失は従
来に比べて１ ｄＢ／ｋｍ少さくな９、波長１．５５Ｃ
μｍ〕ではＰ−０’Ｈ基による吸収損失が小さくなるた
めＯＨ吸収損失は０．３ ｄＢ／ｋｍだけ小さくなる。The optical fiber base material mentioned above is spun into optical fibers one by one, but the OH absorption loss at a wavelength of 1.39 C μm is 1 dB/km less than the conventional one9, and at a wavelength of 1.55 C μm.
μm], the absorption loss due to the P-0′H group becomes smaller, so the OH absorption loss becomes smaller by 0.3 dB/km.
発明の効果
上記の通り本発明によればＯＨ基生成の原因となるＰ′
ｆ：Ｐ２Ｏ５として高温加熱処理により蒸発させること
ができるので、Ｐ−ＯＨ基生成が阻止されて光ファイバ
の長波長帯における低損失化を図ることができる。Effects of the Invention As described above, according to the present invention, P′, which causes the formation of OH groups,
Since it can be evaporated as f:P2O5 by high-temperature heat treatment, the generation of P-OH groups is inhibited, and the loss in the long wavelength band of the optical fiber can be reduced.
第１図は従来の光フアイバ母材の製造方法による屈折率
分布図、第２図は本発明による光フアイバ母材の製造方
法による屈折率分布図である。
特許出願人
富士通株式会社
特許出願代理人
弁理士 青 木 朗
弁理士 西 舘 和 之
弁理士 内 １）幸 男
弁理士 山 口 昭 之FIG. 1 is a refractive index distribution diagram according to a conventional method for manufacturing an optical fiber preform, and FIG. 2 is a refractive index distribution diagram according to a method for manufacturing an optical fiber preform according to the present invention. Patent applicant Fujitsu Ltd. Patent agent Akira Aoki Patent attorney Kazuyuki Nishidate 1) Yukio Patent attorney Akira Yamaguchi
Claims (1)
アイバ母材を製造する方法において、上記コア層を一層
又は複数層堆積し、次にＧｅ（、ｔ４ ｒ ０２−及び
Ｃｌ３から成る混合ガスを石英ガラス管内に導入すると
共に外部から高温加熱を行い、以上のコア層堆積と混合
ガス導入と高温加熱処理から成る工程を繰り返すことに
より低損失の光フアイバ母材を製造することを特徴とす
る光フアイバ母材の製造方法。In a method of manufacturing an optical fiber base material by depositing a core layer on a quartz glass tube by the MCVD method, one or more core layers are deposited, and then a mixed gas consisting of Ge(, t4 r 02- and Cl3) is deposited. An optical fiber characterized by manufacturing a low-loss optical fiber base material by introducing it into a quartz glass tube and heating it at a high temperature from the outside, and repeating the above steps of core layer deposition, mixed gas introduction, and high-temperature heating treatment. Method for manufacturing fiber matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11588983A JPS6011241A (en) | 1983-06-29 | 1983-06-29 | Manufacture of base material for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11588983A JPS6011241A (en) | 1983-06-29 | 1983-06-29 | Manufacture of base material for optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6011241A true JPS6011241A (en) | 1985-01-21 |
Family
ID=14673696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11588983A Pending JPS6011241A (en) | 1983-06-29 | 1983-06-29 | Manufacture of base material for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6011241A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7003984B2 (en) | 2001-04-30 | 2006-02-28 | Verrillon, Inc. | Hybrid manufacturing process for optical fibers |
| CN1301225C (en) * | 2004-05-10 | 2007-02-21 | 烽火通信科技股份有限公司 | Method for producing low water peak fiber |
| WO2007105857A1 (en) * | 2006-03-10 | 2007-09-20 | Ls Cable Ltd. | Method for manufacturing optical fiber preform, optical fiber preform and optical fiber manufactured using the same |
-
1983
- 1983-06-29 JP JP11588983A patent/JPS6011241A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7003984B2 (en) | 2001-04-30 | 2006-02-28 | Verrillon, Inc. | Hybrid manufacturing process for optical fibers |
| CN1301225C (en) * | 2004-05-10 | 2007-02-21 | 烽火通信科技股份有限公司 | Method for producing low water peak fiber |
| WO2007105857A1 (en) * | 2006-03-10 | 2007-09-20 | Ls Cable Ltd. | Method for manufacturing optical fiber preform, optical fiber preform and optical fiber manufactured using the same |
| KR100800813B1 (en) | 2006-03-10 | 2008-02-01 | 엘에스전선 주식회사 | Method of manufacturing optical fiber preform, Optical fiber preform and Optical fiber manufactured using the same |
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