JPH0222142A - Production of polarization-optical fiber preform - Google Patents
Production of polarization-optical fiber preformInfo
- Publication number
- JPH0222142A JPH0222142A JP63171297A JP17129788A JPH0222142A JP H0222142 A JPH0222142 A JP H0222142A JP 63171297 A JP63171297 A JP 63171297A JP 17129788 A JP17129788 A JP 17129788A JP H0222142 A JPH0222142 A JP H0222142A
- Authority
- JP
- Japan
- Prior art keywords
- preform
- base material
- core
- seed
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims abstract description 81
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 238000005507 spraying Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 22
- 239000011162 core material Substances 0.000 abstract description 19
- 239000011521 glass Substances 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000007664 blowing Methods 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 238000005253 cladding Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
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]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/30—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/50—Multiple burner arrangements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、楕円形状部分が含まれる偏波光ファイバ母材
の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a polarized optical fiber preform including an elliptical portion.
〈従来の技術〉
近年、消光比および伝送損失が小さく、偏波面を保存す
るタイプの光ファイバとして、偏波光ファイバが提案さ
れ、光フアイバジャイロスコープ、大源流測定、光フア
イバ干渉計等、各種センサや計測システムへの応用が期
待されている。<Prior art> In recent years, polarized optical fibers have been proposed as optical fibers that have low extinction ratios and transmission losses and preserve the plane of polarization, and have been used in various sensors such as optical fiber gyroscopes, large source current measurements, and optical fiber interferometers. It is expected that it will be applied to measurement systems.
従来、この偏波光ファイバの製造方法としては、（１）
コア、クラッドあるいはコア、クラッド、ジャケットの
各部分を略真円に形成した母材を作り、この母材の最外
層の一部（対向する２側面）を削り落とした後、線引き
して、コア部分やクラッド部分を楕円にする方法、（２
）または、母材の一部（クラッド、ジャケットの対向す
る２箇所等）にピット（高歪発生材料）を入れる方法等
、が提案されている。Conventionally, methods for manufacturing this polarized optical fiber include (1)
A base material with the core, cladding, or each part of the core, cladding, and jacket formed into a nearly perfect circle is made, and a part of the outermost layer (two opposing sides) of this base material is shaved off, and then wire is drawn to form the core. How to make a part or cladding part an ellipse, (2
), or a method of inserting pits (high strain-generating material) in a part of the base material (two opposing locations of the cladding, jacket, etc.) has been proposed.
〈発明が解決しようとする課題〉
しかしながら、上記従来の方法では、いずれも母材に加
工（側面切削、ビット材埋込み等）が必要であるため、
加工が大変である他に、このような加工により、光ファ
イバの伝送損失や構造、強度に悪影響が出る恐れがあっ
た。<Problems to be Solved by the Invention> However, the above conventional methods all require processing (side cutting, bit material embedding, etc.) on the base material;
In addition to being difficult to process, such processing may have an adverse effect on the transmission loss, structure, and strength of the optical fiber.
本発明は、このような従来の実情に鑑みてなされたもで
、その目的とするところは、簡単な方法で、伝送損失や
構造、強度等について、何ら問題のない、優れた偏波光
ファイバ母材の製造方法を提供することにある。The present invention has been made in view of the above-mentioned conventional circumstances, and its purpose is to provide an excellent polarized optical fiber motherboard without any problems in terms of transmission loss, structure, strength, etc., by a simple method. The object of the present invention is to provide a method for manufacturing materials.
〈課題を解決するための手段〉
か＼る本発明の特徴とする点は、コア母材、コア−クラ
ッド型母材、あるいはコア−クラッド−ジャケット型母
材の形成の際、種（出発）母材の外周に母材材料を吹付
けて成長させるわけであるが、そのとき、種母材軸方向
の対向する側面に、原料供給部からガラス微粒子からな
る母材材料を吹付け、材料の付着量に偏りを持たせて、
母材断面を楕円にする偏波光ファイバ母材の製造方法に
ある。<Means for Solving the Problems> A feature of the present invention is that when forming a core base material, a core-clad type base material, or a core-clad-jacket type base material, the seed (starting) The base material is grown by spraying it on the outer periphery of the base material. At that time, the base material made of glass fine particles is sprayed from the raw material supply section onto the opposite sides of the seed base material in the axial direction. By making the amount of adhesion uneven,
A method of manufacturing a polarized optical fiber preform in which the cross section of the preform is elliptical.
〈作用〉
このように本発明では、楕円母材が、通常の光フアイバ
製造方法（外付けＣＶＤ）の延長線上で形成されるため
、製造が簡単で、かつ伝送損失や構造、強度等について
何ら問題のないものが得られる。<Function> As described above, in the present invention, since the elliptical base material is formed as an extension of the normal optical fiber manufacturing method (external CVD), manufacturing is simple, and there is no problem with transmission loss, structure, strength, etc. You can get something without problems.
〈実施例〉
第１図〜第２図は本発明に係る偏波光ファイバ母材の製
造方法の一実施例を示したものであり、この場合は、最
初の出発材料となる種母材１は予め略真円に形成された
透明ガラスコアｌａだけからなる。<Example> Figures 1 and 2 show an example of the method for manufacturing a polarized optical fiber preform according to the present invention. In this case, the seed preform 1, which is the first starting material, is It consists only of a transparent glass core la that has been formed into a substantially perfect circle in advance.
この真円の種母材１の対向する側面に、例えば、加熱部
を兼用した酸水素トーチやバーナ等の原料供給部２，２
を対峙させる。On the opposing sides of this perfect circular seed base material 1, for example, raw material supply parts 2, 2, such as an oxyhydrogen torch or a burner that also serves as a heating part, are installed.
to confront.
そして、例えば、この種母材１を原料供給部２゜２に対
して適宜サイクルでトラバースさせながら、当該種母材
１の対向する両側面にのみ、原料供給部２からガラス微
粒子からなる母材材料（コア材料）３を吹付ける。For example, while traversing this seed base material 1 with respect to the raw material supply section 2゜2 in an appropriate cycle, a base material made of glass fine particles is supplied from the raw material supply section 2 only to both opposing sides of the seed base material 1. Spray material (core material) 3.
この吹付は方法により、母材軸方向の原料供給部２．２
と対峙した側面のＡ点、Ｂ点には当然より多くの母材材
料３が付着され、逆に、原料供給部２，２から離れた側
面の０点、Ｄ点には殆ど母材材料３が付着されさない。This spraying is carried out at the raw material supply section 2.2 in the axial direction of the base material depending on the method.
Naturally, more base material 3 is attached to points A and B on the side facing the raw material supply parts 2 and 2, and conversely, almost all base material 3 is attached to points 0 and D on the side facing away from the raw material supply sections 2 and 2. is not attached.
この結果、第２図に示したように、全体として楕円の母
材が形成される。なお、上記種母材１のトラバースは１
回で十分な厚さに付着させ得る。As a result, as shown in FIG. 2, an elliptical base material is formed as a whole. Note that the traverse of the seed base material 1 is 1
It can be deposited to a sufficient thickness in multiple times.
このようにして形成された母材の外周に所望のクラッド
やジャケットを施し、その楕円が形崩れしないよう調整
して、線引きし、しかる後、所望の処理を施せば、コア
１ａが楕円の偏波光ファイバが得られる。A desired cladding or jacket is applied to the outer periphery of the base material thus formed, the ellipse is adjusted so as not to lose its shape, and a line is drawn.After that, the core 1a is formed by applying the desired treatment. A wave optical fiber is obtained.
また、上記実施例では、種母材１を上下動させであるが
、種母材ｌと原料供給部２とは、相対的にトラバースさ
れていればよく、原料供給部２側をトラバースされるこ
とも可能である。また、理想的な楕円の形状にあたって
は、必要により、原料供給部２側や種母材１側に適当な
動き、例えば水平方向への首振り等を与えることが可能
である。Further, in the above embodiment, the seed base material 1 is moved up and down, but the seed base material 1 and the raw material supply section 2 only need to be traversed relative to each other, and the raw material supply section 2 side is traversed. It is also possible. Further, when forming the ideal elliptical shape, it is possible to give appropriate movement, such as horizontal swinging, to the raw material supply section 2 side and the seed base material 1 side, if necessary.
また、原料供給部２を一対としたが、一方の側に一個設
置してもよく、その場合には、一方の側面が終わったら
他方の側面へと、種母材ｌを間欠的に回転させることが
必要である。さらに、原料供給部２を種母材１の軸方向
に複数段に設置してもよい。この点に関しては、以下の
実施例でも同様である。In addition, although the raw material supply parts 2 are shown as a pair, one may be installed on one side. In that case, when one side is finished, the seed material l is rotated intermittently to the other side. It is necessary. Furthermore, the raw material supply section 2 may be installed in multiple stages in the axial direction of the seed base material 1. Regarding this point, the same applies to the following embodiments.
第３図は本発明に係る偏波光ファイバ母材の製造方法の
他の実施例を示したものであり、この場合は、種母材１
はコアｌａとクラッド１ｂとからなる透明ガラス体で、
この種母材ｌは、予め略真円に形成されている。FIG. 3 shows another embodiment of the method for manufacturing a polarized optical fiber preform according to the present invention; in this case, the seed preform 1
is a transparent glass body consisting of a core la and a cladding 1b,
This seed base material l is previously formed into a substantially perfect circle.
この真円の種母材１を、上記第１図〜第２図の場合と同
様、その対向する側面に、例えば、加熱部を兼用した酸
水素トーチやバーナ等の原料供給部２，２を対峙させる
。As in the case of FIGS. 1 and 2 above, this perfect circular seed base material 1 is provided with raw material supply parts 2, 2, such as an oxyhydrogen torch or a burner, which also serves as a heating part, on the opposite sides thereof. make them confront each other.
そして、例えば、この種母材ｌを原料供給部２゜２に対
して適宜サイクルでトラバースさせながら、当該種母材
１の対向する両側面にのみ、原料供給部２から母材材料
（クラッド材料）３を吹付ける。Then, for example, while traversing this seed base material 1 to the raw material supply section 2゜2 in an appropriate cycle, the base material (clad material ) Spray 3.
この吹付は方法により、母材軸方向の原料供給部２，２
と対峙した側面のＡ点、Ｂ点には当然より多（の母材材
料３が付着され、逆に、原料供給部２，２から離れた側
面の０点、Ｄ点には殆ど母材材料３が付着されない。こ
の結果、図示の如く、全体として楕円の母材が形成され
る。なお、上記種母材ｌのトラバースは１回で十分な厚
さに付着させ得る。Depending on the method, this spraying may be carried out at the raw material supply parts 2, 2 in the axial direction of the base material.
Naturally, more base material 3 is attached to points A and B on the side facing away from the raw material supply parts 2 and 2, and on the contrary, almost all base material 3 is attached to points 0 and D on the side facing away from the raw material supply sections 2 and 2. As a result, as shown in the figure, an elliptical base material is formed as a whole.The seed base material I can be traversed once to a sufficient thickness.
このようにして形成された母材すなわちクラツド１ｂ部
分が楕円である母材を、脱水、透明ガラス化した後、線
引き等すれば、第４図に示したように、コア１ａが楕円
、外形が真円の所望の偏波光ファイバが得られる。The base material formed in this way, that is, the base material in which the clad 1b portion is elliptical, is dehydrated, made into transparent glass, and then drawn, etc., so that the core 1a has an elliptical outer shape as shown in FIG. A perfectly circular polarized optical fiber as desired can be obtained.
なお、上記実施例では、予めコア１ａ、クラツド１ｂ部
分が略真円に形成された種母材１に、さらにクラッド材
料３を付着させた場合であったが、母材形成の当初から
、すなわちコア１ａのみの段階から、その対向する側面
にクラッド材料３を付着させて、楕円とすることも可能
である。In the above embodiment, the cladding material 3 was further attached to the seed base material 1 in which the core 1a and cladding 1b portions were previously formed into a substantially perfect circle. It is also possible to form the core 1a into an ellipse by attaching the cladding material 3 to the opposing sides of the core 1a.
第５図は本発明に係る偏波光ファイバ母材の製造方法の
さらに別の実施例を示したものであり、この場合は、種
母材１はコアｌａとクラッド１ｂとジャケットｌｃとか
らなる透明ガラス体で、この種母材１は、予め略真円に
形成されている。FIG. 5 shows yet another embodiment of the method for manufacturing a polarized optical fiber preform according to the present invention. In this case, the seed preform 1 is a transparent material consisting of a core la, a cladding 1b, and a jacket lc. The seed base material 1, which is a glass body, is formed in advance into a substantially perfect circle.
この真円の種母材１を、上記第１図〜第２図の場合と同
様、その対向する側面に、例えば、加熱部を兼用した酸
水素トーチやバーナ等の原料供給部２，２を対峙させる
。As in the case of FIGS. 1 and 2 above, this perfect circular seed base material 1 is provided with raw material supply parts 2, 2, such as an oxyhydrogen torch or a burner, which also serves as a heating part, on the opposite sides thereof. make them confront each other.
そして、例えば、２０種母材１を原料供給部２゜２に対
して適宜サイクルでトラバースさせながら、当該種母材
１の対向する両側面にのみ、原料供給部２から母材材料
（ジャケット材料）３を吹付ける。For example, while traversing the 20-seed base material 1 to the raw material supply section 2゜2 in appropriate cycles, the base material (jacket material ) Spray 3.
この吹付は方法により、母材軸方向の原料供給部２．２
と対峙しＪこ側面のＡ点、Ｂ点には当然より多くの母材
材料３が付着され、逆に、原料供給部２，２から離れた
側面の０点、Ｄ点には殆ど母材材料３が付着されさない
。この結果、図示の如く、全体として楕円の母材が形成
される。なお、上記種母材１のトラバースは１回で十分
な厚さに付着させ得る。This spraying is carried out at the raw material supply section 2.2 in the axial direction of the base material depending on the method.
Naturally, more base material 3 is attached to points A and B on the side surface of J, and conversely, almost no base material 3 is attached to points 0 and D on the side surface away from the raw material supply sections 2, 2. Material 3 is not deposited. As a result, as shown in the figure, an elliptical base material is formed as a whole. It should be noted that the seed material 1 can be traversed only once to deposit the seed material 1 to a sufficient thickness.
この母材すなわちジャケット１０部分が楕円である母材
を、脱水、透明ガラス化した後、線引きすれば、第６図
に示したように、コア１ａ、クラッド１ｂが楕円、外形
が真円の所望の偏波光ファイバが得られる。If this base material, that is, the base material in which the jacket 10 part is elliptical, is dehydrated and made into transparent vitrification, and then drawn, the core 1a and cladding 1b are elliptical and the outer shape is a perfect circle, as shown in FIG. polarized optical fiber is obtained.
なお、上記実施例では、予めコア１ａ、クラッド１ｂ、
ジャケラｌ−１ｃ部分が略真円に形成された種母材１に
、さらにジャケット材料３を付着させた場合であったが
、母材形成の当初から、すなわちコア１ａ、クラッドｌ
ｂのみの段階から、その対向する側面に、ジャケット材
料３を付着させて、楕円とすることも可能である。In addition, in the above embodiment, the core 1a, the cladding 1b,
This was a case where the jacket material 3 was further attached to the seed base material 1 in which the jacket l-1c portion was formed into a substantially perfect circle.
It is also possible to form an ellipse by attaching jacket material 3 to the opposing sides from the step of only b.
上記いずれの実施例においても、種母材ｌの外周に外付
は法と略同様の方法で、母材材料を付着させる方法であ
るため、僅かな装置の改良等によ′す、簡単に製造でき
、また、この後から付着された付着材料も、もともとの
母材材料と同一ないし同種であるため、馴染みがよく、
伝送損失や構造、強度等について何ら問題のない母材が
得られる。In any of the above embodiments, the method of attaching the base material to the outer periphery of the seed base material L is approximately the same as the method used in the method. In addition, since the adhesive material that is subsequently applied is the same or the same type as the original base material material, it has good compatibility.
A base material with no problems in terms of transmission loss, structure, strength, etc. can be obtained.
〈発明の効果〉
以上の説明から明らかなように本発明によれば、種母材
軸方向の対向する側面に、当該母材に対して相対的に上
下動する原料供給部から母材材料を吹付けるという簡単
な方法で、伝送損失や構造、強度等について、何ら問題
のない、優れた偏波光ファイバ母材の製造方法を提供す
ることができる。<Effects of the Invention> As is clear from the above description, according to the present invention, the base material is supplied to the opposite sides in the axial direction of the seed base material from the raw material supply unit that moves up and down relative to the base material. By a simple method of spraying, it is possible to provide an excellent method of manufacturing a polarized optical fiber preform without any problems in terms of transmission loss, structure, strength, etc.
第１図〜第２図は本発明に係る偏波光ファイバ母材の製
造方法の一実施例を示した各概略説明図、第３図〜第４
図は本発明に係る偏波光ファイバ母材の製造方法の他の
実施例を示した各工程の概略説明図、第５図〜第６図は
本発明に係る偏波光ファイバ母材の製造方法のさらに別
の実施例を示した各工程の概略説明図である。
図中、
ｌ ・ ・ ・
１ ａ ・ ・
■ｂ・・
Ｉ Ｃ・ ・
２ ・ ・ ・
３・・・
種母材、
・コア、
・クラッド、
・ジャケット、
・原料供給部、
・母材材料、
特許出願人 藤倉電線株式会社
第
図
第
図
第３図
第
図
第
５図
第
図FIGS. 1 to 2 are schematic explanatory views showing an embodiment of the method for manufacturing a polarized optical fiber preform according to the present invention, and FIGS. 3 to 4
The figure is a schematic explanatory diagram of each process showing another embodiment of the method for manufacturing a polarized optical fiber preform according to the present invention, and FIGS. 5 and 6 show the method for manufacturing a polarized optical fiber preform according to the present invention. It is a schematic explanatory drawing of each process which showed yet another Example. In the figure, l・・・・１ a・・■b・・IC・・２・・・・３・・・ Seed base material, ・Core, ・Clad, ・Jacket, ・Raw material supply section, ・Base material, Patent applicant: Fujikura Electric Cable Co., Ltd. Figure Figure 3 Figure 5 Figure 5
Claims (1)
型母材、あるいはコア−クラッド−ジャケット型母材の
製造において、種母材軸方向の対向する側面に、原料供
給部から母材材料を吹付けて、母材断面を楕円にする偏
波光ファイバ母材の製造方法。In the production of core preforms, core-clad type preforms, or core-clad-jacket type preforms for manufacturing polarized optical fibers, base material is applied from a raw material supply section to opposite sides in the axial direction of the seed preform. A method for producing a polarized optical fiber base material by spraying to make the cross section of the base material elliptical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63171297A JPH0222142A (en) | 1988-07-09 | 1988-07-09 | Production of polarization-optical fiber preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63171297A JPH0222142A (en) | 1988-07-09 | 1988-07-09 | Production of polarization-optical fiber preform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0222142A true JPH0222142A (en) | 1990-01-25 |
Family
ID=15920682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63171297A Pending JPH0222142A (en) | 1988-07-09 | 1988-07-09 | Production of polarization-optical fiber preform |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0222142A (en) |
-
1988
- 1988-07-09 JP JP63171297A patent/JPH0222142A/en active Pending
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