JPH0222143A - Production of polarization-optical fiber preform - Google Patents
Production of polarization-optical fiber preformInfo
- Publication number
- JPH0222143A JPH0222143A JP63171298A JP17129888A JPH0222143A JP H0222143 A JPH0222143 A JP H0222143A JP 63171298 A JP63171298 A JP 63171298A JP 17129888 A JP17129888 A JP 17129888A JP H0222143 A JPH0222143 A JP H0222143A
- Authority
- JP
- Japan
- Prior art keywords
- preform
- core
- base material
- elliptical
- clad
- 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 22
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000000463 material Substances 0.000 claims abstract description 92
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000005507 spraying Methods 0.000 claims description 27
- 239000011162 core material Substances 0.000 abstract description 52
- 239000002994 raw material Substances 0.000 abstract description 26
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 239000011521 glass Substances 0.000 abstract description 5
- 230000010287 polarization Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 5
- 230000001413 cellular effect Effects 0.000 abstract 1
- 238000005253 cladding Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000012808 vapor phase Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 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
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005373 porous glass Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/105—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type having optical polarisation effects
-
- 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
- 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]
- C03B37/01486—Means for supporting, rotating or translating the preforms being formed, e.g. lathes
-
- 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
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/62—Distance
-
- 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
- C03B2207/66—Relative motion
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/70—Control measures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (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ちで
、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 base material without any problems in terms of transmission loss, structure, strength, etc., by a simple method. The purpose of this invention is to provide a method for manufacturing the same.
〈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、コアークラ
ッド型母材、あるいはコアークラッド−ジャケット型母
材の形成の際、母材材料の吹付は制御により、楕円形状
の母材、または楕円と円形を組み合わせた母材を形成す
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 spraying of the base material material is not performed. The present invention provides a method for manufacturing a polarized optical fiber preform in which an elliptical preform or a preform with a combination of an ellipse and a circular shape is formed by control.
〈作用〉
このように本発明では、母材の楕円化、円形化において
、通常の光フアイバ製造方法（気相軸付は法等）の延長
線上である母材材料の吹付は制御により形成するもので
あるため、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, in making the base material oval and circular, the spraying of the base material is controlled, which is an extension of the normal optical fiber manufacturing method (vapor phase shaft attachment method, etc.). Therefore, it is easy to manufacture, and there are no problems with transmission loss, structure, strength, etc.
〈実施例〉
第１図（Ａ）、（Ｂ）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る。<Example> FIGS. 1A and 1B show an example of a method for manufacturing a polarized optical fiber preform according to the present invention.
この場合は、母材を吊るための種棒１を、例えば、気相
軸付は法（ＶＡＤ法）の装置に入れ、その下端（先端）
に、第１図（Ａ）に示したように例えば、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。In this case, put the seed rod 1 for suspending the base material into a device for the vapor phase axis attachment method (VAD method), and
As shown in FIG. 1(A), for example, a raw material supply section 2.2', such as an oxyhydrogen torch or a burner, which also serves as a heating section, is placed in opposition.
そして、上記種棒ｌの下端に原料供給部２，２′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、
コア母材４を成長させるわけであるが、この場合、原料
供給部２を中心とした、種々の吹付は制御によって、第
１図（Ｂ）に示したようにコア材料３の付着量（成長量
）に偏りを持たせ、全体を楕円に形成する。これにより
楕円の多孔質ガラスからなるコア母材４が得られる。Then, a base material (core material) 3 made of glass fine particles is sprayed onto the lower end of the seed rod l from the raw material supply parts 2 and 2',
The core base material 4 is grown, and in this case, various spraying operations centered on the raw material supply section 2 are controlled to control the adhesion amount (growth) of the core material 3 as shown in FIG. 1(B). (amount) is biased, and the whole is formed into an ellipse. As a result, a core base material 4 made of oval porous glass is obtained.
この際の母材材料３の吹付は制御としては、母材対原料
供給部の相対回転速度の変速制御、母材対原料供給部の
相対離間距離の可変制御、母材材料の吹付は量または反
応率の可変制御、母材材料の付着率の可変制御、または
これらを組合せた制御が考えられる。At this time, the spraying of the base material 3 is controlled by variable speed control of the relative rotational speed between the base material and the raw material supply section, variable control of the relative separation distance between the base material and the raw material supply section, and the spraying of the base material 3 is controlled by the amount or Variable control of the reaction rate, variable control of the adhesion rate of the base material, or a combination of these can be considered.
ここで、上記母材対原料供給部の相対回転速度の変速制
御とは、コア材料３の吹付けにおいて、例えば、成長過
程にあるコア母材４のＡ点、Ｂ点では母材対原料供給部
の相対回転速度を遅くし、逆に、０点、Ｄ点では相対回
転速度を速くして行う制御である。これにより、Ａ点、
Ｂ点では付着量が多くかつ付着物が硬くなり、０点、Ｄ
点では付着量が少なくかつ付着物が柔らかくなるという
ように、コア材料３の付着量に偏りが生じ、全体として
楕円が形成される。Here, the variable speed control of the relative rotational speed of the base material to raw material supply section means that, in spraying the core material 3, for example, at points A and B of the core base material 4 in the growth process, the base material to raw material supply section is This control is performed by slowing down the relative rotational speed at the 0 point and point D, and conversely increasing the relative rotational speed at the 0 point and the D point. As a result, point A,
At point B, the amount of adhesion is large and the adhesion is hard, 0 point, D
The amount of deposited core material 3 is uneven, such that the amount of deposited material is small and the deposits are soft at points, and an ellipse is formed as a whole.
また、上記母材対原料供給部の相対離間距離の可変制御
とは、コア材料３の吹付けにおいて、例えば、コア母材
４のＡ点、Ｂ点では母材対原料供給部の相対離間距離を
短くし、逆に、０点、Ｄ点では相対離間距離を長くして
行う制御である。これにより、Ａ点、Ｂ点では付着量が
多くかつ付着物が硬くなり、０点、Ｄ点では付着量が少
なくかつ付着物が柔らかくなるというように、コア材料
３の付着量に偏りが生じ、やはり全体として楕円が形成
される。Furthermore, the variable control of the relative separation distance between the base material and the raw material supply section refers to, for example, the relative separation distance between the base material and the raw material supply section at points A and B of the core base material 4 during spraying of the core material 3. This control is performed by shortening the distance, and conversely by increasing the relative separation distance at the 0 point and the D point. As a result, the amount of core material 3 deposited becomes uneven, such that at points A and B, the amount of deposit is large and the deposit is hard, and at point 0 and D, the amount of deposit is small and the deposit is soft. , an ellipse is formed as a whole.
また、上記母材材料の吹付は量または反応率の可変制御
とは、コア材料３の吹付けにおいて、例えば、コア母材
４のＡ点、Ｂ点では原料供給部２からの母材材料３の吹
付は量を多くするか、または反応率を高めて吹き付け、
逆に、０点、Ｄ点では原料供給部２からの母材材料３の
吹付は量を少なくするか、または反応率を低めて吹き付
けて行う制御である。この吹付は量のコントロールは弁
機構の開閉度の調整や、吹付は圧力の調整等で行い、ま
た反応率のコントロールにあっては、混合ガス成分の調
整、流速の調整等で行う。これにより、Ａ点、Ｂ点では
付着量が多く、０点、Ｄ点では付着量が少なくというよ
うに、コア材料３の付着量に偏りが生じ、上記と同様、
全体として楕円が形成される。In addition, variable control of the amount or reaction rate of the base material spraying means that, in the spraying of the core material 3, for example, at point A and point B of the core base material 4, the base material 3 from the raw material supply section 2 is When spraying, increase the amount or increase the reaction rate.
On the other hand, at point 0 and point D, the base material 3 is sprayed from the raw material supply section 2 in a smaller amount or at a lower reaction rate. The amount of this spraying is controlled by adjusting the opening/closing degree of the valve mechanism, the spraying is controlled by adjusting the pressure, and the reaction rate is controlled by adjusting the mixed gas components, the flow rate, etc. As a result, the amount of core material 3 adhered becomes uneven, with a large amount of adhesion at points A and B, and a small amount of adhesion at point 0 and point D, and as described above,
An ellipse is formed as a whole.
また、上記母材材料の付着率の可変制御とは、コア材料
３の吹付けにおいて、例えば、コア母材４のＡ点、Ｂ点
では原料供給部２からの母材材料３の付着率を高め、逆
に、０点、Ｄ点では原料供給部２からの母材材料３の付
着率低めて行う制御である。この付着率のコントロール
は、例えば装置内の排気圧や排気量を調整したり、ある
いは吹付けの方向等を調整して行う。これにより、Ａ点
、Ｂ点では付着量が多く、０点、Ｄ点では付着量が少な
くというように、コア材料３の付着量に偏りが生じ、上
記と同様、全体として楕円が形成される。In addition, the variable control of the adhesion rate of the base material 3 refers to, for example, controlling the adhesion rate of the base material 3 from the raw material supply section 2 at points A and B of the core base material 4 during spraying of the core material 3. Conversely, at the 0 point and the D point, the adhesion rate of the base material 3 from the raw material supply section 2 is decreased. The adhesion rate is controlled by, for example, adjusting the exhaust pressure and exhaust volume within the device, or by adjusting the direction of spraying. As a result, the amount of core material 3 deposited becomes uneven, with a large amount of deposited at points A and B, and a small amount of deposited at points 0 and D, and an ellipse is formed as a whole, similar to the above. .
第２図は他の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る。FIG. 2 shows an embodiment of a method for manufacturing a polarized optical fiber preform according to another embodiment of the present invention.
この場合は、少なくとも内外部の２層が組み合わされた
母材（例えば、コアークラッド型母材）を製造する場合
である。In this case, a base material (for example, a core clad base material) in which at least two inner and outer layers are combined is manufactured.
そして、内部層のコア母材４部分は、上記第１図（Ａ）
、（Ｂ）の発明と同様にして形成し、図示のように、そ
の外周に、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を対峙させ、上記発明のときとは、丁度逆
の関係の吹付は制御を行って、コア母材４の外周にガラ
ス微粒子からなる母材材料（クラッド材料）５を吹き付
けて、外部層のクラッド６を円形に形成する。The 4 portions of the core base material of the inner layer are shown in FIG. 1 (A) above.
, is formed in the same manner as the invention of (B), and as shown in the figure, a raw material supply part 2 such as an oxyhydrogen torch or a burner which also serves as a heating part is placed on the outer periphery of the material supplying part 2, which is exactly the same as in the case of the invention described above. The spraying in the opposite relationship is controlled, and the base material (cladding material) 5 made of glass fine particles is sprayed on the outer periphery of the core base material 4 to form the cladding 6 of the outer layer in a circular shape.
ここで、逆の吹付は制御とは、楕円コア母材４の長軸側
のＡ′点、Ｂ′点にはクランド材料５の付着量を少なく
し、短軸側のＣ′点、Ｄ′点にはクラッド材料５の付着
量を多くして、クラッド６外形を円形に形成する制御を
いう。Here, the reverse spraying control means that the amount of the crund material 5 attached is reduced at points A' and B' on the long axis side of the elliptical core base material 4, and the amount of the crand material 5 is reduced at points C' and D' on the short axis side. This refers to control in which the amount of the cladding material 5 deposited is increased to form the outer shape of the cladding 6 into a circular shape.
その吹付は制御としては、上記コア母材形成の場合と同
様、母材対原料供給部の相対回転速度の変速制御、母材
対原料供給部の相対離間距離の可変制御、母材材料の吹
付は量または反応率の可変制御、母材材料の付着率の可
変制御、またはこれらを組合せた制御が用いられる。The spraying is controlled, as in the case of forming the core base material, by variable speed control of the relative rotational speed between the base material and the raw material supply section, variable control of the relative separation distance between the base material and the raw material supply section, and spraying of the base material. Variable control of the amount or reaction rate, variable control of the deposition rate of the base material, or a combination of these is used.
このような制御により、吹き付は形成されたコアークラ
ッド型母材を脱水、透明ガラス化し、しかる後、線引き
すれば、目的の偏波光ファイバが得られる。With such control, the spraying dehydrates the formed core clad base material and turns it into transparent glass, and then draws it to obtain the desired polarized optical fiber.
なお、内部層のコア母材４の楕円化にあたっては、上記
第１図（Ａ）、（Ｂ）の発明による場合の他に、例えば
第３図や、第４図（Ａ）、（Ｂ）に示した制御によって
も製造することが可能である。In addition, in making the core base material 4 of the inner layer oval, in addition to the invention shown in FIGS. 1(A) and (B), for example, the invention shown in FIGS. It is also possible to manufacture it by the control shown in .
つまり、第３図の場合は、予め真円コア母材４ａを作り
、この真円コア母材４ａの外周に、上記と同様の制御に
より、コア材料３を吹き付けて、楕円コア母材４を形成
する場合である。That is, in the case of FIG. 3, a perfect circular core base material 4a is made in advance, and the core material 3 is sprayed onto the outer periphery of this perfect circular core base material 4a under the same control as above to form an elliptical core base material 4. This is the case when forming.
第４図（Ａ）、（Ｂ）の場合は、やはり予め真円コア母
材４ａを作り、例えば、真円コア母材４ａの対向する側
面に原料供給部２，２を対峙させ、母材対原料供給部を
、当該母材の軸方向に相対的にトラバース（上下動等）
させ、コア母材４ａのＡ点、Ｂ点の側面にのみ母材材料
３を吹き付ける制御である。In the case of FIGS. 4(A) and 4(B), the perfect circular core base material 4a is also made in advance, and for example, the raw material supply parts 2, 2 are made to face opposite sides of the perfect circular core base material 4a, and the base material is Relative traverse of the raw material supply section in the axial direction of the base material (up and down movement, etc.)
In this control, the base material 3 is sprayed only on the side surfaces of the core base material 4a at points A and B.
これにより、原料供給部２．２と対峙した側面のＡ点、
Ｂ点では付着量が多く、逆に、原料供給部２．２から離
れた０点、Ｄ点では付着量が少なくというようにコア材
料３の付着量に偏りが生じ、全体として楕円のコア母材
４が形成される。As a result, point A on the side facing the raw material supply section 2.2,
There is a bias in the amount of core material 3 deposited, with a large amount of deposited at point B and, conversely, a small amount of deposited at point 0 and point D, which are far from the raw material supply section 2.2, resulting in an elliptical core matrix as a whole. A material 4 is formed.
なお、本制御の場合、母材４ａの一方の側面にのみ原料
供給部２を設置することも可能で、その際には、一方の
側面への吹付けが終わったら他方の側面への吹付けとい
うように母材４ａを間欠的に回転させる必要がある（原
料供給部２側の間欠的を回転も可）。In addition, in the case of this control, it is also possible to install the raw material supply section 2 only on one side of the base material 4a, and in that case, when the spraying on one side is finished, the spraying on the other side is stopped. It is necessary to rotate the base material 4a intermittently in this way (intermittent rotation on the raw material supply section 2 side is also possible).
この第４図（Ａ）、（Ｂ）に示した制御は、上記クラッ
ド６の円形化制御に適用することも可能である。The control shown in FIGS. 4(A) and 4(B) can also be applied to the circularization control of the cladding 6.
なお、上記各側では、コア母材４や、コアークラッド型
母材７の形成についてであったが１１本発明では、これ
に限定されず、例えば、第５図に示したコアークラッド
−ジャケット型母材９にも応用可能である。つまり、略
真円のコア母材４ａに、上記種々の吹付は制御により、
楕円のクラッド６を作り、次にこの楕円のクラッド６部
分に、やはり上記種々の吹付は制御により、円形のジャ
ケット８を作り、これを脱水、透明ガラス化した後、線
引きすれば、コア４ａ、クラッド６が楕円、外形が真円
の所望の偏波光ファイバが得られる。In addition, although the core base material 4 and the core clad type base material 7 were formed on each side above, the present invention is not limited to this, and for example, the core clad-jacket type shown in FIG. It can also be applied to the base material 9. In other words, the above-mentioned various types of spraying are carried out by controlling the approximately perfect circular core base material 4a.
An elliptical cladding 6 is made, and then a circular jacket 8 is made on the elliptical cladding 6 portion by controlling the various spraying methods described above, which is dehydrated and made into transparent glass, and then drawn to form a core 4a, A desired polarized optical fiber having an elliptical cladding 6 and a perfect circular outer shape can be obtained.
上記いずれの実施例においても、通常の母材製造方法で
ある気相軸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り、簡単
に製造でき、母材の楕円化、円形化において、通常の光
フアイバ製造方法（気相軸付は法、外付けＣＶＤ等）の
延長線上である母材材料の吹付は制御により形成するも
のであるため、製造が簡単で、内部層、外部層の成形に
無理がないため、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 examples, vapor phase attachment, which is a normal base material manufacturing method, is a method that is almost the same as the method and is a method for attaching the base material, so it can be easily made with slight improvements in the equipment etc. The spraying of the base material is an extension of the normal optical fiber manufacturing method (vapor phase shaft attachment method, external CVD, etc.) in making the base material oval and circular. Therefore, it is easy to manufacture and there is no difficulty in molding the inner and outer layers, resulting in a base material that has good conformability and no problems with transmission loss, structure, strength, etc.
〈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、母材の
楕円化、円形化において、種々の母材材料の吹付は制御
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, when making the base material oval or circular, the spraying of various base materials can be controlled in a simple manner, and transmission loss, structure, and strength can be controlled. It is possible to provide an excellent method for manufacturing a polarized optical fiber preform without any problems.
第１図（Ａ）、（Ｂ）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２図
は他の本発明に係る偏波光ファイバ母材の製造方法の一
実施例を示した概略説明図、第３図〜第４図（Ａ）、（
Ｂ）は母材楕円化の他の実施例を示した各概略説明図、
第５図は他の母材例を示した概略説明図である。
図中、
第１図（，４）
第１図（Ｂ）
第２図
種棒、
原料供給部、
母材材料、
コア母材（内部層）、
母材材料、
クラッド（外部Ｎ）、
コアークラッド型母材、
コアークラッド−ジャグ
ト型母材、
第３図
第５図FIGS. 1A and 1B are schematic explanatory diagrams showing one embodiment of a method for manufacturing a polarized optical fiber preform according to the present invention, and FIG. 2 is a diagram showing another polarized optical fiber preform according to the present invention. Schematic explanatory diagrams showing an example of the manufacturing method, FIGS. 3 to 4 (A), (
B) is a schematic explanatory diagram showing other examples of base material ovalization,
FIG. 5 is a schematic explanatory diagram showing another example of the base material. In the figure, Figure 1 (, 4) Figure 1 (B) Figure 2 Type bar, raw material supply section, base material, core base material (inner layer), base material, cladding (external N), core cladding Mold base material, core clad-jugt mold base material, Fig. 3 Fig. 5
Claims (2)
形状が楕円の母材を付着成長させる偏波光ファイバ母材
の製造方法。(1) A method for manufacturing a polarized optical fiber preform in which a preform having an elliptical cross-sectional shape is attached and grown on the lower end of a seed rod by controlling the spraying of the preform material.
製造において、母材材料の吹付け制御により、内部層を
楕円に、外部層を円形に形成する偏波光ファイバ母材の
製造方法。(2) A method for manufacturing a polarized optical fiber preform, in which the preform is made of a combination of at least two inner and outer layers, and the inner layer is formed into an elliptical shape and the outer layer is formed into a circular shape by controlling the spraying of the preform material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63171298A JPH0222143A (en) | 1988-07-09 | 1988-07-09 | Production of polarization-optical fiber preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63171298A JPH0222143A (en) | 1988-07-09 | 1988-07-09 | Production of polarization-optical fiber preform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0222143A true JPH0222143A (en) | 1990-01-25 |
Family
ID=15920698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63171298A Pending JPH0222143A (en) | 1988-07-09 | 1988-07-09 | Production of polarization-optical fiber preform |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0222143A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2950621A1 (en) * | 2009-09-25 | 2011-04-01 | Draka Comteq France | Refilling preform of optical fiber, comprises modulating quantity of silicon deposited on preform in function of angular position of preform, where deposition of silicon is carried by projection and vitrification of silicon precursor |
-
1988
- 1988-07-09 JP JP63171298A patent/JPH0222143A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2950621A1 (en) * | 2009-09-25 | 2011-04-01 | Draka Comteq France | Refilling preform of optical fiber, comprises modulating quantity of silicon deposited on preform in function of angular position of preform, where deposition of silicon is carried by projection and vitrification of silicon precursor |
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