JPS6392903A - Optical fiber cable - Google Patents
Optical fiber cableInfo
- Publication number
- JPS6392903A JPS6392903A JP61238339A JP23833986A JPS6392903A JP S6392903 A JPS6392903 A JP S6392903A JP 61238339 A JP61238339 A JP 61238339A JP 23833986 A JP23833986 A JP 23833986A JP S6392903 A JPS6392903 A JP S6392903A
- Authority
- JP
- Japan
- Prior art keywords
- chuck
- core wire
- strand
- refractive index
- 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 description 15
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000031700 light absorption Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 239000012809 cooling fluid Substances 0.000 claims 1
- 230000020169 heat generation Effects 0.000 abstract description 5
- 229910001507 metal halide Inorganic materials 0.000 abstract description 2
- 150000005309 metal halides Chemical class 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000002184 metal Substances 0.000 description 19
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000005253 cladding Methods 0.000 description 4
- 235000011164 potassium chloride Nutrition 0.000 description 3
- 239000001103 potassium chloride Substances 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- PGAPATLGJSQQBU-UHFFFAOYSA-M thallium(i) bromide Chemical compound [Tl]Br PGAPATLGJSQQBU-UHFFFAOYSA-M 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Landscapes
- 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
本発明はレーザ加工機などにおいて、高出力レーザ光を
所定位置まで導（ための高伝送効率の光ファイバケーブ
ルに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical fiber cable with high transmission efficiency for guiding high-output laser light to a predetermined position in a laser processing machine or the like.
従来の技術
レーザ加工機においては、発振効率が高く、高出力が得
やすい炭酸ガスレーザがもっばら用いられている。しか
し、炭酸ガスレーザは波長が１０．６μｍという遠赤外
であり、通信用などに用いられている石英ファイバでは
導光出来ない。そこで、たとえばＫＲＳ−５などの金属
ハロゲン化物を材料とする光ファイバが用いられている
。しかし、これらの材料は素材がもろく光ファイバケー
ブルの外周にクラッドを施すことが難しい。それ故に、
一般的には光ファイバケーブルのコア素線をチューブに
通し、このチューブ内面とコア素線間の空気層をクラッ
ドとするルースクラッド型光ファイバケーブルとして用
いられることが多い。In conventional laser processing machines, carbon dioxide lasers are often used because they have high oscillation efficiency and can easily produce high output. However, the carbon dioxide laser has a far-infrared wavelength of 10.6 μm, and cannot be guided through quartz fibers used for communications. Therefore, optical fibers made of metal halides such as KRS-5 are used. However, these materials are brittle and it is difficult to apply a cladding to the outer periphery of the optical fiber cable. Therefore,
Generally, the core wire of an optical fiber cable is passed through a tube, and the inner surface of the tube and the air space between the core wire serve as the cladding, and the cable is often used as a loose-clad optical fiber cable.
発明が解決しようとする問題点
レーザ光は、コア素線と空気層の界面で全反射されコア
素線内を伝送されるが、この全反射の際に僅か（約レー
ザ光の波長程度）ではあるが、レーザ光がコア素線外に
しみ出す。また、上述のような従来のルースクラッド型
光ファイバケーブルは緩挿されるコア素線とチューブと
の固定のために接着剤あるいはチャックが必要であり、
これらはレーザ光吸収物質である。そのために、この部
分でコア素線からしみ出したレーザ光が接着剤あるいは
チャックに吸収され、その固定部分が発熱して光ファイ
バケーブルを損傷してしまう問題点がある。Problems to be Solved by the Invention Laser light is totally reflected at the interface between the core wire and the air layer and transmitted within the core wire. However, the laser light seeps out of the core wire. In addition, the conventional loose clad optical fiber cable described above requires adhesive or a chuck to secure the loosely inserted core wire to the tube.
These are laser light absorbing materials. Therefore, there is a problem in that the laser light seeping out of the core wire at this part is absorbed by the adhesive or the chuck, causing the fixed part to generate heat and damaging the optical fiber cable.
そこで、レーザ光のしみ出しによる発熱を防ぐために例
えば特開昭５９−３１９０４号公報に示されるように固
定部分のみのコア素線にクラッドを施こした例もあるが
、部分的にせよりラッドを施すのは容易ではない。また
、光ファイバケーブルの固定可能な位置が上記り、ラッ
ドの位置により制限されるという問題もあり、必ずしも
良い方法ではない。Therefore, in order to prevent heat generation due to seepage of laser light, there are examples of applying cladding to the core wire only in the fixed part, as shown in Japanese Patent Application Laid-open No. 59-31904, but cladding is applied to the core wire only in the fixed part. It is not easy to apply. Furthermore, there is also the problem that the position at which the optical fiber cable can be fixed is limited by the position of the rad as described above, and this is not necessarily a good method.
問題点を解決するための手段
本発明はかかる問題点に鑑みてなされたもので、コア素
線と、このコア素線を内挿するチューブと前記コア素線
を係止するチャックとを備え、このチャック内面に前記
コア素線より低屈折率で光吸収の少ない光透過材料を形
成した光ファイバケーブルをその手段とする。Means for Solving the Problems The present invention has been made in view of the above problems, and includes a core wire, a tube into which the core wire is inserted, and a chuck for locking the core wire, The means for this purpose is an optical fiber cable in which a light-transmitting material having a lower refractive index and less light absorption than the core wire is formed on the inner surface of the chuck.
作用
コア素線との接触面であるチャック内面にコア素線より
も低屈折率で光を吸収しない透過材が形成されてなるこ
とにより、この面においてもレーザ光は全反射される。A transparent material that has a lower refractive index than the core wire and does not absorb light is formed on the inner surface of the chuck, which is the contact surface with the working core wire, so that the laser beam is totally reflected on this surface as well.
従って、光吸収物質であるチャックにまでレーザ光がし
み出し、チャックが発熱することはない。以上により、
発熱による損失の少ない高伝送効率の光ファイバケーブ
ルを実現出来る。Therefore, the laser light does not penetrate into the chuck, which is a light-absorbing material, and the chuck does not generate heat. Due to the above,
It is possible to realize an optical fiber cable with high transmission efficiency and low loss due to heat generation.
実施例 以下本発明の一実施例を添付図にもとすいて説明する。Example An embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明の光ファイバケーブルの金属チャック近
傍の断面図である。第１図に示すように、コア素線１は
直径０．５ｍｍのＫＨ２−５を材料とし、金属チューブ
２に内装されている。この金属チューブ２は、内径０．
６ｍｍ１外径０．９ｍｍの細いステンレスチューブで構
成され、コア素線１と同程度の可撓性をもっている。ま
た、コア素線１の端部は金属チャック３ ａ ％ ３
ｂにより係止され、コア素線１と金属チューブ２の間に
約○。FIG. 1 is a sectional view of the vicinity of the metal chuck of the optical fiber cable of the present invention. As shown in FIG. 1, the core wire 1 is made of KH2-5 with a diameter of 0.5 mm, and is housed in a metal tube 2. This metal tube 2 has an inner diameter of 0.
It is composed of a thin stainless steel tube with an outer diameter of 6 mm and an outer diameter of 0.9 mm, and has the same degree of flexibility as the core wire 1. In addition, the end of the core wire 1 is held by a metal chuck 3 a % 3
b, and approximately ○ between the core wire 1 and the metal tube 2.
ｌｌｌ１ｍの隙間を設けたルースクラッド構造となって
いる。It has a loose clad structure with a gap of 1m.
金属チャック３ａ、３ｂは第２図に示すように２つ割り
構造となっており、コア素線１との接触部には光透過材
料としてＫＣＩ（塩化カリウム）の蒸着膜４ａ、４ｂが
１０μｍ程度形成されている。また、金属チャック３ａ
は第１図に示すように金属チューブ２に接着固定されて
おり、もう一方の金属チャック３ｂとゴムのＯリング５
によりコア素線１を挟支する。The metal chucks 3a and 3b have a two-part structure as shown in FIG. 2, and the parts in contact with the core wire 1 are coated with vapor-deposited films 4a and 4b of KCI (potassium chloride) of about 10 μm as a light-transmitting material. It is formed. In addition, metal chuck 3a
is adhesively fixed to the metal tube 2 as shown in FIG. 1, and the other metal chuck 3b and the rubber O-ring 5
The core wire 1 is held between the two.
この実施例では、コア素線１の材料であるＫＨ８−５は
屈折率が約２．４であるのに対し、金属チャック３ａ、
３ｂに蒸着されたＫＣＩ（塩化カリウム）は屈折率が約
１．５と低（、この界面でも全反射によりコア素線内に
レーザ光を閉じ込めることが出来る。また、金属チャッ
ク３ａ、３ｂに蒸着されるＫＣＩ（塩化カリウム）の膜
厚がほぼ波長程度あるために全反射の際に、レーザ光の
にじみ出しは金属チャック面までは届かず、従来のよう
なにじみ出しによる金属チャック３ａ、３ｂの発熱は防
げる。In this embodiment, KH8-5, which is the material of the core wire 1, has a refractive index of about 2.4, whereas the metal chuck 3a,
The KCI (potassium chloride) deposited on the metal chucks 3b has a low refractive index of approximately 1.5 (the laser beam can be confined within the core wire by total reflection even at this interface. Because the film thickness of KCI (potassium chloride) is approximately the same as the wavelength, the oozing of the laser beam does not reach the metal chuck surface during total reflection, and the oozing of the metal chucks 3a and 3b as in the conventional case does not occur. Prevents fever.
また、ゴミあるいはホコリ等がらコア素線１の端面を守
るための、Ｚｎ５ｅよりなるウィンドウ６が設けられて
おり、ウィンドホルダー７により支持されている。Further, a window 6 made of Zn5e is provided to protect the end face of the core wire 1 from dirt or dust, and is supported by a window holder 7.
更に、注入口８から注入される冷却空気は、金属チュー
ブ２と樹脂チューブ９との間に沿って流れて、この金属
チューブ２を冷却する。また、反対側には同様な冷却空
気の排気口が設けられている。Furthermore, the cooling air injected from the injection port 8 flows along between the metal tube 2 and the resin tube 9 to cool the metal tube 2. A similar cooling air exhaust port is provided on the opposite side.
発明の効果
以上のように本発明によればチャック内面にコア素線よ
り低屈折率で光吸収率の小さい光透過材を形成すること
いう簡単な構成により、レーザ光のチャックへのしみ出
しを防ぎ発熱を押さえることが容易に行える。Effects of the Invention As described above, according to the present invention, a light transmitting material having a lower refractive index and a lower light absorption rate than the core wire is formed on the inner surface of the chuck, which is a simple structure, thereby preventing laser light from seeping into the chuck. It is easy to prevent and suppress heat generation.
従って、本発明の光ファイバケーブルは高出力のレーザ
光を効率良（所定位置まで導くのに極めて有効である。Therefore, the optical fiber cable of the present invention is highly effective in guiding high-power laser light to a predetermined position.
第１図は本発明の一実施例に於ける光ファイバケーブル
の金属チャック部の断面図、第２図は同金属チャックの
分解斜視図である。
１−ｍ−コア素線、２−ｍ−金属チューブ、３ａ、３ｂ
−ｍ−金属チャック、４ａ、４ｂ−−一蒸着膜代理人の
氏名 弁理士 中尾敏男 ほか１名祐１目FIG. 1 is a sectional view of a metal chuck portion of an optical fiber cable in an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the same metal chuck. 1-m-core wire, 2-m-metal tube, 3a, 3b
-m-Metal chuck, 4a, 4b--Name of evaporated film agent Patent attorney Toshio Nakao and 1 other person Yu 1st
Claims (2)
前記コア素線を係止するチャックとを備え、このチャッ
ク内面に前記コア素線より低屈折率で光吸収の少ない光
透過材料を形成した光ファイバケーブル。(1) A core wire, a tube into which the core wire is inserted, and a chuck that locks the core wire, and the inner surface of the chuck has a lower refractive index and less light absorption than the core wire and transmits light. Fiber optic cable formed material.
の範囲第１項記載の光ファイバケーブル。(2) The optical fiber cable according to claim 1, wherein a cooling fluid is caused to flow on the outer surface of the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238339A JPS6392903A (en) | 1986-10-07 | 1986-10-07 | Optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238339A JPS6392903A (en) | 1986-10-07 | 1986-10-07 | Optical fiber cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6392903A true JPS6392903A (en) | 1988-04-23 |
Family
ID=17028731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61238339A Pending JPS6392903A (en) | 1986-10-07 | 1986-10-07 | Optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6392903A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7725239B2 (en) | 2004-10-07 | 2010-05-25 | Honda Motor Co., Ltd | Plant control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938416B2 (en) * | 1982-05-07 | 1984-09-17 | マツダ株式会社 | engine intake system |
| JPS6016893U (en) * | 1983-07-12 | 1985-02-05 | 石川島播磨重工業株式会社 | Wooden cooling tower humidity control device |
-
1986
- 1986-10-07 JP JP61238339A patent/JPS6392903A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938416B2 (en) * | 1982-05-07 | 1984-09-17 | マツダ株式会社 | engine intake system |
| JPS6016893U (en) * | 1983-07-12 | 1985-02-05 | 石川島播磨重工業株式会社 | Wooden cooling tower humidity control device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7725239B2 (en) | 2004-10-07 | 2010-05-25 | Honda Motor Co., Ltd | Plant control system |
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