JPH01109306A - Production of optical fiber for infrared light - Google Patents
Production of optical fiber for infrared lightInfo
- Publication number
- JPH01109306A JPH01109306A JP62268569A JP26856987A JPH01109306A JP H01109306 A JPH01109306 A JP H01109306A JP 62268569 A JP62268569 A JP 62268569A JP 26856987 A JP26856987 A JP 26856987A JP H01109306 A JPH01109306 A JP H01109306A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- crystal
- single crystal
- polycrystalline
- 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 6
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000835 fiber Substances 0.000 claims abstract description 46
- 239000013078 crystal Substances 0.000 claims abstract description 41
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- -1 Thallium halide Chemical class 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 229910052792 caesium Inorganic materials 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims abstract description 3
- 229910052709 silver Inorganic materials 0.000 claims abstract description 3
- 239000004332 silver Substances 0.000 claims abstract description 3
- 229910052716 thallium Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 4
- PGAPATLGJSQQBU-UHFFFAOYSA-M thallium(i) bromide Chemical compound [Tl]Br PGAPATLGJSQQBU-UHFFFAOYSA-M 0.000 abstract description 9
- 230000020169 heat generation Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 239000013081 microcrystal Substances 0.000 description 2
- 229910052798 chalcogen Inorganic materials 0.000 description 1
- 150000001787 chalcogens Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method 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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
- C03B37/023—Fibres composed of different sorts of glass, e.g. glass optical fibres, made by the double crucible technique
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/008—Polycrystalline optical fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/80—Non-oxide glasses or glass-type compositions
- C03B2201/84—Halide glasses other than fluoride glasses, i.e. Cl, Br or I glasses, e.g. AgCl-AgBr "glass"
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、レーザ加工やレーザ医療に用いる赤外光ファ
イバに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an infrared optical fiber used for laser processing and laser medical treatment.
従来の技術
中赤外域（４μｍ〜２０μｍ）を伝送するファイバ材料
として、カルコゲンガラスや金属ハロゲン化物が用いら
れており、中でもハロゲン化タリウムは数μｍから２０
μｍ以上を透過できる材料であり、特にＣＯ２レーザの
ＩＯ２６μｍの波長のを高パワーのエネルギーを伝送で
きる数少ない優れたファイバである。Conventional technology Chalcogen glass and metal halides are used as fiber materials that transmit mid-infrared wavelengths (4 μm to 20 μm), and among them, thallium halide is used for transmission in the mid-infrared region (4 μm to 20 μm).
It is a material that can transmit wavelengths of μm or more, and is one of the few excellent fibers that can transmit high-power energy, especially at the wavelength of IO26 μm of CO2 laser.
更に、ＴｌＢｒ−Ｔｌ１結晶（にＲ５−５）は、加熱押
出法により作成される多結晶ファイバである。Furthermore, TlBr-Tl1 crystal (R5-5) is a polycrystalline fiber made by a hot extrusion method.
このような多結晶ＫＲＳ−５ファイバは、１０数μｍか
ら６０μｍの微結晶が中赤外域では光学的界面をもたな
いファイバである。Such a polycrystalline KRS-5 fiber is a fiber in which microcrystals of 10-odd μm to 60 μm have no optical interface in the mid-infrared region.
発明が解決しようとする問題点
以−Ｅの方法で制作されたファイバにＣＯ２レーザ光を
通し、人力パワーを増加させて行くと、ファイバの途中
で溶解し、ファイバが破断する現象がみられる０例えば
、０．５ｍｍｘ１．５ｍのＫＲＳ−５のファイバにＣＯ
２レーザを伝送すると、１００Ｗ程度で溶断が始まる。Problems to be Solved by the Invention - When a CO2 laser beam is passed through a fiber produced by the method E and the manual power is increased, a phenomenon is observed in which the fiber melts in the middle and the fiber breaks. For example, CO on a 0.5mm x 1.5m KRS-5 fiber
When two lasers are transmitted, fusing starts at about 100W.
このファイバが高パワーのＣＯ２レーザ光で溶断する原
因は、ファイバ内の結晶粒界の遊離や不純物元素による
ものと考えられる。The reason why this fiber is fused by high-power CO2 laser light is thought to be due to the release of crystal grain boundaries within the fiber and impurity elements.
問題点を解決するための手段
加熱押出法により赤外光学結晶をファイバ化する方法に
おいて、ファイバ用母結晶に単結晶を用い、多結晶ファ
イバ化する。Means for Solving the Problems In a method of forming an infrared optical crystal into a fiber by a heating extrusion method, a single crystal is used as a fiber mother crystal, and a polycrystalline fiber is formed.
作用
ファイバのパワー伝送能力を向上させるには、ファイバ
自身を構成している微結晶の粒界の遊離や発熱の原因に
なる不純物元素を除去する必要がある。この２つの大き
な原因を取り除くためには、ファイバ用母結晶の吠態が
大切であり、上記の方法により、多結晶ファイバの結晶
粒界の遊離がなくなるとともに、光の反射ロスによる発
熱がなくなる。さらに、結晶の純度が向上し、ファイバ
自身の発熱が小さくなり、高エネルギーを伝送できる赤
外ファイバが製作できる。In order to improve the power transmission ability of a working fiber, it is necessary to remove impurity elements that cause the release of grain boundaries of microcrystals constituting the fiber itself and heat generation. In order to eliminate these two major causes, the state of the fiber host crystal is important, and the above method eliminates the separation of the crystal grain boundaries of the polycrystalline fiber and also eliminates heat generation due to light reflection loss. Furthermore, the purity of the crystal is improved, the heat generation of the fiber itself is reduced, and an infrared fiber that can transmit high energy can be manufactured.
実施例
第１図はブリッジマン法などで制作されたＫＲＳ−５の
結晶を切り出し６面を光学研磨したものである。（ａ）
は、いろんな結晶方向を持った結晶、 （ｂ）は、１つ
の結晶方位しか示さない単結晶である０本発明は、 （
ｂ）のような単結晶を用いる０次に、多結晶Ｋ ＲＳ
−５フアイバの製造方法は加熱押出法を用いた。第２図
は押出装置の概念図である。ｌはプリフォーム結晶、２
は多結晶ファイバ、３は加圧するためのパンチ棒、４は
ファイバの径をきめるダイス、５はヒータを示す。Embodiment FIG. 1 shows a KRS-5 crystal produced by the Bridgman method or the like, cut out and optically polished on six sides. (a)
is a crystal with various crystal orientations, and (b) is a single crystal that shows only one crystal orientation.
b) Zero-order, polycrystalline KRS using a single crystal like
-5 fiber was manufactured using a heating extrusion method. FIG. 2 is a conceptual diagram of the extrusion device. l is preform crystal, 2
3 indicates a polycrystalline fiber, 3 a punch rod for applying pressure, 4 a die for determining the diameter of the fiber, and 5 a heater.
次に製造手順について述べる。第３図は多結晶ファイバ
の製造行程を示す。Next, the manufacturing procedure will be described. FIG. 3 shows the manufacturing process of polycrystalline fiber.
単結晶の評価は、第１図に示したように切り出した結晶
の６面を光学研磨し、Ｈｅ−Ｎｅレーザで照射すること
によって簡易的に選別できる。則ち、結晶の中に異なる
成長面があると反射と散乱が生ずる。このようにＨｅ−
Ｎｅレーザを照射し観察して選別できる。ダイの径は任
意に選定できるが実施例では直径０．５ｍｍとした。押
し出し用コンテナの径に合わせてＫＲＳ−５単結晶を円
柱状に成形し、押出前のプリフォーム結晶とした。Single crystals can be easily evaluated by optically polishing six sides of the cut crystal as shown in FIG. 1 and irradiating it with a He-Ne laser. In other words, reflection and scattering occur when there are different growth planes within the crystal. In this way, He-
It can be sorted by irradiating with Ne laser and observing. The diameter of the die can be arbitrarily selected, but in the example, the diameter was 0.5 mm. A KRS-5 single crystal was molded into a cylindrical shape to match the diameter of an extrusion container to obtain a preform crystal before extrusion.
結晶の径はコンテナの壁面と出来るだけ密着する方がよ
い、ファイバ押出し温度は２００°Ｃ−２７０°Ｃで押
出を行なう、押出し温度が低くなるとファイバの出てく
る速度が遅くなる。十分にファイバに加圧されるような
条件が上述である。第２図に示す押出装置を使ってファ
イバを制作する。It is better for the diameter of the crystal to be in close contact with the wall of the container as much as possible.The fiber extrusion temperature is 200°C-270°C.The lower the extrusion temperature, the slower the speed at which the fiber comes out. The above conditions are such that the fiber is sufficiently pressurized. The fiber is produced using the extrusion apparatus shown in FIG.
次に、ファイバの両端面を研磨し、ＣＯ２レーザを通す
ことが可能になる。Next, both end faces of the fiber are polished to allow passage of a CO2 laser.
表１．はファイバのパワー伝送限界を示す、ファイバを
つくる母結晶のＫＲＳ−５の結晶性を比較している。Table 1. compares the crystallinity of KRS-5, the host crystal from which the fiber is made, which indicates the power transmission limit of the fiber.
多相を有するＫＲＳ−５結晶とは、第１図の（ａ）に示
したものであり、（ｂ）の単結晶とは大きく異なってい
る。使用する結晶を２つに大別し、前述の方法でファイ
バを製作し、Ｃ０２レーザを通し、パワー伝送能力を測
定した結果の平均値を示す。The KRS-5 crystal having multiple phases is shown in FIG. 1(a), and is significantly different from the single crystal shown in FIG. 1(b). The crystals used are roughly divided into two types, fibers are fabricated by the method described above, and the power transmission capabilities are measured by passing them through a C02 laser.The average value of the results is shown.
（以下余白）
表 １
ＫＲＳ−５単結晶から製作したファイバは、パワーの伝
送能力が３倍あり、非常に優れている。(Left below) Table 1 Fiber made from KRS-5 single crystal has three times the power transmission ability, which is extremely superior.
これらの方法は、ハロゲン化銀、ハロゲン化セシウムを
用いて多結晶ファイバを製作する上で応用される。These methods are applied to fabricate polycrystalline fibers using silver halide and cesium halide.
発明の効果
本発明により高出力化されたファイバを用いたＣ Ｏ２
レーザ用光ケーブルは、従来の３倍以上の伝送が可能に
なり、鉄板の切断も可能になった。Effects of the invention CO2 using a fiber with high output according to the present invention
Laser optical cables can now transmit more than three times as much as conventional cables, and can also cut iron plates.
は単結晶を各々示す斜視図、第２図は多結晶ファイバの
押出装置の概念図、第３図はファイバ製造の全体行程を
示す工程図である。2 is a perspective view showing each single crystal, FIG. 2 is a conceptual diagram of an extrusion device for polycrystalline fiber, and FIG. 3 is a process diagram showing the entire process of fiber manufacturing.
ｌ・・・・プリフォーム結晶、２・・・・多結晶赤外フ
ァイバ、３・・・・パンチ棒、４・・・・ダイス、５・
・・・ヒータ。l... Preform crystal, 2... Polycrystalline infrared fiber, 3... Punch rod, 4... Dice, 5...
···heater.
代理人の氏名 弁理士 中尾敏男 はか１名Ｉｌ１図 （ＣＬ） （ｂ）ＷＥ ２ 図Name of agent: Patent attorney Toshio Nakao (1 person) (CL) (b) WE 2 Diagram
Claims (3)
方法において、ファイバ用母結晶に単結晶を用い、多結
晶ファイバ化することを特徴とする赤外用光ファイバの
製造方法。(1) A method for producing an infrared optical fiber, which is characterized in that a single crystal is used as a fiber mother crystal to form a polycrystalline fiber in a method of forming an infrared optical crystal into a fiber by a heating extrusion method.
ゲン化銀、またはハロゲン化セシウムを用いることを特
徴とする特許請求の範囲第１項記載の赤外用光ファイバ
の製造方法。(2) The method for manufacturing an infrared optical fiber according to claim 1, characterized in that thallium halide, silver halide, or cesium halide is used as the single crystal base material.
ｒ４０−４５ｗｔ％）の単結晶を用いることを特徴とす
る特許請求の範囲第１項記載の赤外用光ファイバの製造
方法。(3) TlBr-TlI (TlB
2. The method for manufacturing an infrared optical fiber according to claim 1, characterized in that a single crystal of r40-45 wt%) is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62268569A JPH01109306A (en) | 1987-10-23 | 1987-10-23 | Production of optical fiber for infrared light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62268569A JPH01109306A (en) | 1987-10-23 | 1987-10-23 | Production of optical fiber for infrared light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01109306A true JPH01109306A (en) | 1989-04-26 |
Family
ID=17460342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62268569A Pending JPH01109306A (en) | 1987-10-23 | 1987-10-23 | Production of optical fiber for infrared light |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01109306A (en) |
-
1987
- 1987-10-23 JP JP62268569A patent/JPH01109306A/en active Pending
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