JPH01200310A - Coating method for flat clad polarization constant fiber - Google Patents
Coating method for flat clad polarization constant fiberInfo
- Publication number
- JPH01200310A JPH01200310A JP63025349A JP2534988A JPH01200310A JP H01200310 A JPH01200310 A JP H01200310A JP 63025349 A JP63025349 A JP 63025349A JP 2534988 A JP2534988 A JP 2534988A JP H01200310 A JPH01200310 A JP H01200310A
- Authority
- JP
- Japan
- Prior art keywords
- flat
- coating
- fiber
- shape
- secondary coating
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 147
- 239000000835 fiber Substances 0.000 title claims abstract description 73
- 230000010287 polarization Effects 0.000 title claims description 56
- 239000011248 coating agent Substances 0.000 claims abstract description 132
- 239000000463 material Substances 0.000 claims abstract description 56
- 238000005253 cladding Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005491 wire drawing 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は偏平なりラッド形状を有する定偏波ファイバの
被覆方法に関し１．とくに二次被覆を施す方法の改良に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of coating a polarization constant fiber having a flat or rad shape.1. In particular, it relates to improvements in methods for applying secondary coatings.
定偏波ファイバは、接続および他の光学部品との結合を
行う場合、定偏波ファイバの偏波の主軸方向を外観から
判別できることが望ましい。When a polarization-constant fiber is connected or coupled to other optical components, it is desirable that the direction of the principal axis of polarization of the polarization-constant fiber can be determined from its appearance.
また、定偏波ファイバを曲げた際に発生する偏波保持特
性の劣化は、劣化量が曲げ方向依存性を有することから
、曲げによる偏波保持特性の劣化を最小限に抑えるため
にも、定偏波ファイバの偏波の主軸方向が外観から判別
可能であり、外観からの判別をもとに劣化量の最小とな
る方向に定偏波ファイバを曲げることが望ましい。In addition, since the amount of deterioration in polarization maintaining characteristics that occurs when a polarization constant fiber is bent is dependent on the bending direction, in order to minimize the deterioration in polarization maintaining characteristics due to bending, It is desirable that the principal axis direction of the polarization of the polarization-controlled fiber can be determined from its appearance, and that the polarization-controlled fiber be bent in the direction that minimizes the amount of deterioration based on the determination from the appearance.
このため、従来、定偏波ファイバの偏波の主軸方向を外
観から判別できる方法として、定偏波ファイバのクラッ
ド形状を偏平とする方法が行われている。For this reason, conventionally, as a method for determining the principal axis direction of polarization of a polarization constant fiber from its appearance, a method has been used in which the cladding shape of the polarization constant fiber is made flat.
第５図は従来の偏平クラッド定偏波ファイバ被覆方法に
よるファイバ断面の構造例を示す図である。５Ｉはコア
、５２は偏平形状のクラッド、５３は応力付与部、５４
は被覆を示す。FIG. 5 is a diagram showing an example of the structure of a fiber cross section obtained by a conventional flat cladding polarization constant fiber coating method. 5I is a core, 52 is a flat cladding, 53 is a stress applying part, 54
indicates coating.
Ｃ発明が解決しようきする課題〕
従来の偏平クラッド定偏波ファイバの被覆方法は特に考
慮されておらず、通常の円形クラッド定偏波ファイバと
同様な方法で被覆を行っている。C Problems to be Solved by the Invention] No particular consideration has been given to the coating method of the conventional flat clad polarization constant fiber, and the coating is carried out in the same manner as a normal circular clad polarization constant fiber.
このため、ファイバの保護に十分な被覆を行うと、被覆
材の表面張力のため、たとえクラッドの形状が偏平であ
っても、第５図に示したように被覆の断面形状は円形に
なってしまい、外観から定偏波ファイバの偏波の主軸方
向を判別することができないという問題がある。Therefore, if a sufficient coating is applied to protect the fiber, the cross-sectional shape of the coating will become circular as shown in Figure 5, even if the cladding is flat, due to the surface tension of the coating material. Therefore, there is a problem in that it is not possible to determine the direction of the principal axis of polarization of the polarization constant fiber from its appearance.
本発明は従来の問題点を解決し、偏平クラッド定偏波フ
ァイバの偏波の主軸方向が外観から判別可能な被覆構造
を備えた偏平クラッド定偏波ファイバの被覆方法を提供
するもので、偏平のクラッド形状を有する定偏波ファイ
バの線引時に、偏平のクラッド形状を有するファイバに
薄肉の一次被覆を施し、線引後に前記一次被覆の外周に
二次被覆を施す偏平クラッド定偏波ファイバの被覆方法
において、前記線引後の薄肉の一次被覆の外周に二次被
覆を施す工程は、薄肉の一次被覆を施した一次被覆ファ
イバの外周に二次被覆材を塗布し、塗布した二次被覆の
被覆材が完全に硬化する前に、二次被覆押しつぶし手段
により、二次被覆材を前記偏平のクラッド形状と同じ偏
平形状に押しつぶし、次いで、二次被覆材硬化装置によ
り、前記偏平のクラッド形状と同じ偏平形状に押しつぶ
した状態で二次被覆材を完全硬化する工程からなること
を特徴としている。The present invention solves the conventional problems and provides a method for coating a flat clad polarization constant fiber with a coating structure that allows the main axis direction of polarization of the flat clad constant polarization fiber to be determined from its appearance. When drawing a polarization-controlled fiber having a cladding shape, a thin primary coating is applied to the fiber having a flat cladding shape, and a secondary coating is applied to the outer periphery of the primary coating after drawing. In the coating method, the step of applying a secondary coating to the outer periphery of the thin primary coating after drawing involves applying a secondary coating material to the outer periphery of the primary coating fiber to which the thin primary coating has been applied, and removing the applied secondary coating. Before the coating material is completely cured, a secondary coating crushing means crushes the secondary coating material into the same flat shape as the flat cladding shape, and then a secondary coating material curing device crushes the secondary coating material into the same flat shape as the flat cladding shape. It is characterized by the step of completely curing the secondary coating material while it is crushed into the same flat shape as the above.
また線引後の薄肉の一次被覆の外周に二次被覆を施す工
程は、薄肉の一次被覆を施した偏平のクラッド形状を有
する一次被覆ファイバを、ガイド機構により、前記偏平
のクラッド形状の偏平方向を保持したまま二次被覆材を
塗布する工程を付加することは有効である。In addition, in the step of applying a secondary coating to the outer periphery of the thin primary coating after drawing, the primary coating fiber having a flat cladding shape and having a thin primary coating is guided by a guide mechanism in the flat direction of the flat cladding shape. It is effective to add a step of applying a secondary coating material while maintaining the .
本発明の被覆方法において、一次被覆を施す工程は、一
次被覆は薄肉であり、使用する一次被覆、材の量が少量
であることから、一次被覆材の表面張力が働いても、一
次被覆の断面形状が円形になることはなく、クラッドの
偏平形状が保有された被覆形状を備えている。In the coating method of the present invention, in the step of applying the primary coating, since the primary coating is thin and the amount of primary coating material used is small, even if the surface tension of the primary coating material acts, the primary coating The cross-sectional shape is not circular, and the covering shape maintains the flat shape of the cladding.
一次被覆終了後の一次被覆′ファイバの形状が偏平であ
ることを利用し、二次被覆を施す工程においては、二次
被覆を行う装置を、定偏波ファイバの偏波の主軸方向が
変化しないよう制御しながら二次被覆を行う。Taking advantage of the flat shape of the primary coated fiber after the primary coating is completed, in the process of applying the secondary coating, the main axis direction of the polarization of the constant polarization fiber does not change. Perform the secondary coating under controlled conditions.
二次被覆を行う工程は、一次被覆ファイバに二次被覆材
を塗布し、二次被覆材が完全に硬化されず、外力により
二次被覆材の形状が変形する半硬化の状態で、二次被覆
材押しつぶし手段により、偏平クラッド、一次被覆と同
一方向に偏平になるよう押しつぶし、偏平形状を保持し
たまま完全に硬化する方法であることから、二次被覆の
形状は偏平クラッドと同一方向に偏平な形状となり、偏
平クラッドの偏平方向により偏波の主軸方向が判別可能
な母材を用いれば、偏平クラッド定偏波ファイバの外観
から偏波の主軸方向を判別することのできる被覆を施す
ことができる。以下図面にもとづき実施例について説明
する。The process of performing secondary coating is to apply a secondary coating material to the primary coated fiber. This method uses a coating material crushing method to crush the flat cladding so that it becomes flat in the same direction as the primary coating, and then completely cures while maintaining the flat shape, so the shape of the secondary coating is flat in the same direction as the flat cladding. By using a base material that has a shape that allows the principal axis direction of polarized waves to be determined from the flat direction of the flat cladding, it is possible to apply a coating that allows the principal axis direction of polarized waves to be determined from the appearance of the flat cladding constant polarization fiber. can. Examples will be described below based on the drawings.
第１図ａ、ｂに本発明の偏平クラッド定偏波ファイバの
被覆方法の工程概要を示す。第１図ａは一次被覆を施す
線引工程で、１は偏平クラッド定偏波ファイバ用母材、
２は線引炉、３は一次被覆用ダイス、４は一次被覆材硬
化装置、５は巻取ボビンを示す。第１図ａに示す工程に
おいて偏平クラッド定偏波ファイバに対して薄肉の一次
被覆が施される。FIGS. 1a and 1b show an outline of the process for coating a flat clad polarization constant fiber according to the present invention. Figure 1a shows the drawing process for applying the primary coating; 1 is the base material for flat clad polarization constant fiber;
2 is a drawing furnace, 3 is a primary coating die, 4 is a primary coating material curing device, and 5 is a winding bobbin. In the step shown in FIG. 1a, a thin primary coating is applied to the flat clad polarization constant fiber.
一次被覆を施す線引工程が終了し、巻取られた一次被覆
ファイバは、第１図すの二次被覆を施す工程により二次
被覆が行われる。一次被覆ファイバは一次被覆下でン６
から供給され、二次被覆用ダイス７により薄肉の一次被
覆の外周に二次被覆材が供給・塗布された後、第１の二
次被覆材硬化装置８により半硬化が行われる。この工程
では、二次被覆材は完全には硬化されない。半硬化状態
の二次被覆材は、二次被覆材押しつぶし手段として、た
とえば二次被覆材押しつぶしローラ９により、二次被覆
材の形状が偏平クラッドと同一方向に偏平となるよう押
しつぶされる。押しつぶされて偏平となった二次被覆材
は第２の二次被覆材硬化装置１０により偏平形状を保持
した状態で完全に硬化され、偏平クラッド定偏波ファイ
バを形成し、巻取ボビン１１に巻取られる。After the drawing process for applying the primary coating is completed, the wound primary coated fiber is subjected to the secondary coating in the process for applying the secondary coating shown in FIG. The primary coated fiber is
After the secondary coating material is supplied and applied to the outer periphery of the thin primary coating by the secondary coating die 7, semi-curing is performed by the first secondary coating material curing device 8. In this step, the secondary coating is not completely cured. The semi-cured secondary covering material is crushed by a secondary covering material crushing means, such as a secondary covering material crushing roller 9, so that the shape of the secondary covering material becomes flat in the same direction as the flat cladding. The crushed and flattened secondary coating material is completely cured by the second secondary coating material curing device 10 while maintaining its flat shape, forming a flat clad constant polarization fiber, and then transferred to the winding bobbin 11. It is wound up.
第１図ａの一次被覆を施す工程において、一次被覆用ダ
イス３により供給・塗布される一次被覆材の量は少〒で
あり、一次被覆材の表面張力が作用しても被覆断面形状
が円形になることはなく、クラッドの偏平形状を保有し
た被覆形状の一次被覆ファイバが得られる。In the step of applying the primary coating in Figure 1a, the amount of primary coating material supplied and applied by the primary coating die 3 is small, and even if the surface tension of the primary coating material acts, the cross-sectional shape of the coating is circular. A primary coated fiber having a coated shape that retains the flat shape of the cladding is obtained.
第２図ａに一次被覆ファイバの断面構造を示す。FIG. 2a shows the cross-sectional structure of the primary coated fiber.
２１はコア、２３は応力付与部、２２は偏平クラッド、
２４は偏平クラッドの偏平形状を保有した一次被覆であ
る。21 is a core, 23 is a stress applying part, 22 is a flat cladding,
Reference numeral 24 denotes a primary coating having the flat shape of a flat cladding.
第１図すの二次被覆を施す工程において、二次被覆の断
面形状は偏平クラッドと同一方向に偏平な形状となり、
母材１にクラッドの偏平方向により偏波の主軸方向が判
定可能な母材を用いると、定偏波ファイバの外観から偏
波の主軸方向が判別可能となる。In the step of applying the secondary coating shown in Figure 1, the cross-sectional shape of the secondary coating becomes flat in the same direction as the flat cladding,
If a base material 1 is used in which the principal axis direction of polarized waves can be determined based on the flattened direction of the cladding, the principal axis direction of polarized waves can be determined from the appearance of the polarization constant fiber.
第２図すに二次被覆２５を施した本発明による偏平クラ
ッド定偏波ファイバの断面構造を示す。FIG. 2 shows a cross-sectional structure of a flat clad polarization constant fiber according to the present invention provided with a secondary coating 25.
次に本発明の偏平クラッド定偏波ファイバの被覆方法に
３１′り被覆を行った偏平クラッド定偏波ファイバの９
体例について説明する。Next, 9 of the flat clad polarization constant fiber was coated according to the method of coating the flat clad polarization constant fiber of the present invention.
An example will be explained.
第３図ａ、ｂは本発明の偏平クラッド定偏波ファイバの
被覆方法の一実施例の工程概要で、第３図ａは一次被覆
工程、第３図すは二次被覆工程を示す。１は）ｉ！１常
の円形クラッド定偏波ファイバ母材を研削し”で作成し
た偏平クラッド定偏波ファイバ母材、２は線引炉、３は
薄肉の一次被覆用ダイスである。薄肉の一次被覆材とし
てはポリイミドを使用した。４は一次被覆材硬化装置、
５０は一次被覆ファイバを巻取ボビン６１に導出するガ
イドローラである。3a and 3b are process outlines of an embodiment of the coating method for a flat clad polarization constant fiber of the present invention, with FIG. 3a showing the primary coating step and FIG. 3(b) showing the secondary coating step. 1) i! 1 is a flat clad polarization constant fiber base material prepared by grinding a regular circular clad constant polarization fiber base material, 2 is a drawing furnace, and 3 is a die for thin primary coating.As a thin primary coating material. used polyimide. 4 is a primary coating material curing device;
Reference numeral 50 denotes a guide roller that guides the primary coated fiber to the winding bobbin 61.
本実施例に使用した通常の円形クラッド定偏波ファイバ
母材を研削して作成した偏平クラッド定偏波ファイバ母
材の断面形状を要部寸法とともに第４図ａに示す。４１
はコア、４２は偏平形状のクラッド、４３は応力付与部
である。FIG. 4a shows the cross-sectional shape of a flat clad polarization constant fiber preform, which was prepared by grinding an ordinary circular clad polarization constant fiber preform used in this example, together with the dimensions of the main parts. 41
42 is a core, 42 is a flat cladding, and 43 is a stress applying portion.
第４図すは薄肉の一次被覆を施した線引後の偏平クラッ
ド定偏波ファイバの線引後の要部寸法を示した断面形状
である。４４はポリイミドによる一次被覆である。第４
図すかられかるように、線引後もクラッド４２の形状は
偏平であり、薄肉のポリイミドの一次被覆４４もクラッ
ド４２と同様に偏平形状を保有していることが確認され
た。FIG. 4 is a cross-sectional shape showing the dimensions of the main part after drawing of a flat clad polarization constant fiber with a thin primary coating after drawing. 44 is a primary coating of polyimide. Fourth
As can be seen from the figure, it was confirmed that the shape of the clad 42 was flat even after drawing, and that the thin primary coating 44 of polyimide also had a flat shape like the clad 42.
線引終了後、一次被覆を施した一次被覆ファイバに、第
３図すに示す二次被覆工程により二次被覆を施した。第
３図すにおいて、６は一次被覆ファイバボビン、１２は
ガイド機構で、本実施例ではガイドローラを使用した。After the drawing was completed, a secondary coating was applied to the primary coated fiber in a secondary coating process shown in FIG. 3. In FIG. 3, 6 is a primary coated fiber bobbin, 12 is a guide mechanism, and in this example, a guide roller was used.
７は二次被覆用ダイスである。一次被覆ファイバは、１
２のガイ−ローラにより偏平方向を一定に保持した状態
で二次被覆用ダイス７に送り込まれ、二次被覆材が塗布
される。二次被覆材としては紫外線硬化樹脂を使用した
。８および１０はそれぞれ二次被覆材硬化装置で、本実
施例ではＵＶランプを使用した。９は二次被覆材押しつ
ぶしローラ、１３はガイドローラ、１４は巻取ボビンで
ある。7 is a die for secondary coating. The primary coated fiber is 1
The sheet is fed into the secondary coating die 7 with its flattened direction kept constant by the guy rollers No. 2, and a secondary coating material is applied thereto. An ultraviolet curing resin was used as the secondary coating material. 8 and 10 are secondary coating material curing devices, and in this example, a UV lamp was used. 9 is a secondary covering material crushing roller, 13 is a guide roller, and 14 is a winding bobbin.
二次波ｗＩ材硬化装置８のＵＶランプにより半硬化状態
に硬化した二次被覆は、二次被覆押しつぶし１」−ラ９
により、偏平クラッドおよび偏平状の一次被覆と同一方
向に偏平となるように押しつぶされ、二次被覆材硬化袋
′７Ｌ１０のＵＶランプにより、押し７つぶされて偏平
の状態になった形状を保持したまま完全に硬化される。The secondary coating cured to a semi-cured state by the UV lamp of the secondary wave wI material curing device 8 is crushed by the secondary coating 1''-ra 9
The material was crushed into a flat shape in the same direction as the flat cladding and the flat primary coating, and was crushed by a UV lamp in a secondary coating material curing bag '7L10 to maintain its flattened shape. Leave to be completely cured.
第４図０６二二次被覆を施した後の偏平クラッド定偏波
ファイバの断面を寸法とともに示す。４５は二次被覆で
あり、第４図ａ、ｂと同一符号は同一部分を示す。第４
図Ｃから、クラッド４２、−人波覆４４、二次被覆４５
はそれぞれ同一方向に偏平な形状を有していることがわ
かる。FIG. 4 shows a cross section of a flat clad polarization constant fiber after secondary coating is applied, along with dimensions. 45 is a secondary coating, and the same reference numerals as in FIGS. 4a and 4b indicate the same parts. Fourth
From Figure C, cladding 42, - human wave covering 44, secondary covering 45
It can be seen that they each have a flat shape in the same direction.
本実施例において、二次被覆４５の偏平方向は外観から
容易に判別可能であり、本発明による偏平クラッド定偏
波ファイバの被覆方法によれば、偏平クラッド定偏波フ
ァイバの偏波の主軸方向が外観から判別できることが確
認された。In this embodiment, the flat direction of the secondary coating 45 can be easily determined from the appearance, and according to the method of coating a flat clad polarization constant fiber according to the present invention, the direction of the main axis of polarization of the flat clad polarization constant fiber is It was confirmed that it can be determined from the appearance.
以上説明したように、本発明の偏平クラッド定偏波ファ
イバの被覆方法は薄肉の一次被覆を施し、偏平形状を保
持したままの一次被覆ファイバを線引した後、二次被覆
材を塗布し、二次被覆材を半硬化した状態で偏平のクラ
ッド形状、−人波覆形状と同じ偏平形状に押しつぶした
状態で完全硬化する工程からなる被覆方法であることか
ら、本発明により作製される偏平クラッド定偏波ファイ
バは、偏波の主軸方向が外観から容易に判別することが
でき、接続または他の光学部品との結合が必要な定偏波
ファイバ、および使用に際して曲げる必要のある定偏波
ファイバの製造に本発明を適用してその効果が大きい。As explained above, the method for coating a flat clad polarization constant fiber of the present invention involves applying a thin primary coating, drawing the primary coating fiber while maintaining its flat shape, and then applying a secondary coating material. Since the coating method consists of the steps of semi-curing the secondary coating material into a flat cladding shape, and completely curing the secondary coating material in a state where it is crushed into the same flat shape as the human wave sheathing shape, the flat cladding produced by the present invention Fixed polarization fibers include fixed polarization fibers whose main axis direction of polarization can be easily determined from their appearance, which require connection or coupling with other optical components, and fixed polarization fibers that need to be bent before use. The present invention has great effects when applied to the production of.
第１図ａ、ｂは本発明の偏平クラッド定偏波ファイバ被
覆方法工程概要図、第２図ａ、ｂは本発明の偏平クラッ
ド定偏波ファイバ被覆方法によるファイバ断面構造図、
第３図ａ、ｂは本発明の偏平クラッド定偏波ファイバ被
覆方法実施例の工程図、第４図ａ、ｂ、ｃは本発明の偏
平クラッド定偏波ファイバ被覆方法実施例の要部工程に
おけるファイバ断面図、第５図は従来の偏平クラッド定
偏波ファイバ被覆方法によるファイバ断面構造図である
。
１・・・母材、２・・・線引炉、３・・・−人波覆用ダ
イス、４・・・−人波覆材硬化装置、５，１１，６１．
１４・・・巻取ボビン、５０．１２．１３・・・ガイド
ローラ、６・・・−人波覆ファイバボビン、７・・・二
次被覆用ダイス、８．１０・・・二次被覆材硬化装置、
９・・・二次被覆材押しつぶしローラ、２１，４１．５
１・・・コア、、２２，４２．５２・・・偏平クラッド
、２３，４３．５３・・・応力付与部、２４．４４−・
・−人波覆、２５．４５・・・二次被覆、５４・・・被
覆特許出願人 住友電気工業株式会社
代理人 弁理士 玉 蟲 久五部FIGS. 1a and 1b are process outline diagrams of the flat cladding constant polarization fiber coating method of the present invention, and FIGS. 2a and 2b are fiber cross-sectional structure diagrams according to the flat cladding constant polarization fiber coating method of the present invention,
Figures 3a and 3b are process diagrams of an embodiment of the flat cladding constant polarization fiber coating method of the present invention, and Figures 4a, b, and c are main steps of an embodiment of the flat cladding constant polarization fiber coating method of the present invention. FIG. 5 is a cross-sectional structural diagram of a fiber obtained by a conventional flat clad polarization constant fiber coating method. DESCRIPTION OF SYMBOLS 1... Base material, 2... Wire drawing furnace, 3...-Die for human wave covering, 4...-- Human wave covering material hardening device, 5, 11, 61.
14... Winding bobbin, 50.12.13... Guide roller, 6... - human wave coated fiber bobbin, 7... Secondary coating die, 8.10... Secondary coating material curing equipment,
9... Secondary covering material crushing roller, 21, 41.5
1...Core, 22,42.52...Flat cladding, 23,43.53...Stress applying part, 24.44-.
- Jinha cover, 25.45...Secondary coating, 54...Coating patent applicant Sumitomo Electric Industries Co., Ltd. agent Patent attorney Tama Mushi Kugobe
Claims (2)
引時に、偏平のクラッド形状を有するファイバに薄肉の
一次被覆を施し、線引後に前記一次被覆の外周に二次被
覆を施す偏平クラッド定偏波ファイバの被覆方法におい
て、前記線引後の薄肉の一次被覆の外周に二次被覆を施
す工程は、前記薄肉の一次被覆を施した一次被覆ファイ
バの外周に二次被覆材を塗布し、前記塗布した二次被覆
の被覆材が完全に硬化する前に、二次被覆押しつぶし手
段により、二次被覆材を前記偏平のクラッド形状と同じ
偏平形状に押しつぶし、次いで、二次被覆材硬化装置に
より、前記偏平のクラッド形状と同じ偏平形状に押しつ
ぶした状態で二次被覆材を完全硬化する工程からなるこ
とを特徴とする偏平クラッド定偏波ファイバの被覆方法
。(1) When drawing a polarization constant fiber having a flat cladding shape, a thin primary coating is applied to the fiber having a flat cladding shape, and a secondary coating is applied to the outer periphery of the primary coating after drawing. In the polarization fiber coating method, the step of applying a secondary coating to the outer periphery of the thin primary coating after drawing includes applying a secondary coating material to the outer periphery of the primary coating fiber to which the thin primary coating has been applied; Before the coating material of the applied secondary coating is completely cured, the secondary coating material is crushed into the same flat shape as the flat clad shape by a secondary coating crushing means, and then the secondary coating material is crushed by a secondary coating material curing device. A method for coating a flat clad polarization constant fiber, comprising the step of completely curing a secondary coating material in a state in which it is crushed into the same flat shape as the flat clad shape.
施す工程は、薄肉の一次被覆を施した偏平のクラッド形
状を有する一次被覆ファイバを、ガイド機構により、前
記偏平のクラッド形状の偏平方向を保持したまま前記二
次被覆材を塗布する工程を含んでなることを特徴とする
特許請求の範囲第１項記載の偏平クラッド定偏波ファイ
バの被覆方法。(2) In the step of applying a secondary coating to the outer periphery of the thin primary coating after drawing, the primary coating fiber having a flat cladding shape with a thin primary coating is guided by a guide mechanism into the flat cladding shape. 2. The method for coating a flat clad polarization constant fiber according to claim 1, further comprising the step of applying the secondary coating material while maintaining the flat direction of the fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63025349A JPH01200310A (en) | 1988-02-05 | 1988-02-05 | Coating method for flat clad polarization constant fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63025349A JPH01200310A (en) | 1988-02-05 | 1988-02-05 | Coating method for flat clad polarization constant fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01200310A true JPH01200310A (en) | 1989-08-11 |
Family
ID=12163395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63025349A Pending JPH01200310A (en) | 1988-02-05 | 1988-02-05 | Coating method for flat clad polarization constant fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01200310A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659805U (en) * | 1993-01-18 | 1994-08-19 | 日本電信電話株式会社 | Optical fiber for feedthrough |
| US5673352A (en) * | 1996-01-12 | 1997-09-30 | Alcatel Submarine Networks, Inc. | Fiber optic micro cable |
| WO2013114770A1 (en) | 2012-02-01 | 2013-08-08 | 住友電気工業株式会社 | Multi-core optical fiber tape |
-
1988
- 1988-02-05 JP JP63025349A patent/JPH01200310A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659805U (en) * | 1993-01-18 | 1994-08-19 | 日本電信電話株式会社 | Optical fiber for feedthrough |
| US5673352A (en) * | 1996-01-12 | 1997-09-30 | Alcatel Submarine Networks, Inc. | Fiber optic micro cable |
| WO2013114770A1 (en) | 2012-02-01 | 2013-08-08 | 住友電気工業株式会社 | Multi-core optical fiber tape |
| US9453979B2 (en) | 2012-02-01 | 2016-09-27 | Sumitomo Electric Industries, Ltd. | Multi-core optical fiber tape |
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