JPH0210304A - Manufacture of infrared optical fiber - Google Patents
Manufacture of infrared optical fiberInfo
- Publication number
- JPH0210304A JPH0210304A JP63161660A JP16166088A JPH0210304A JP H0210304 A JPH0210304 A JP H0210304A JP 63161660 A JP63161660 A JP 63161660A JP 16166088 A JP16166088 A JP 16166088A JP H0210304 A JPH0210304 A JP H0210304A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- plane
- optical fiber
- infrared optical
- extrusion
- 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
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
- 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
- Engineering & Computer Science (AREA)
- 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)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、レーザメスあるいはレーザ加工機に有用な高
エネルギー伝送用赤外用光ファイバの製造方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing an infrared optical fiber for high energy transmission useful for laser scalpels or laser processing machines.
従来の技術
最近、医療分野におけるレーザメス、産業分野における
レーザ加工機など、赤外域のレーザ光の利用が試みられ
ており、特にＣＯ２レーザ（発振波長１０．６μｍ）が
多く使われている。これらの中赤外域の波長を高エネル
ギーで伝送できるファイバが得られれば、大きく応用展
開が可能となる。BACKGROUND OF THE INVENTION Recently, attempts have been made to utilize infrared laser light in laser scalpels in the medical field, laser processing machines in the industrial field, etc., and CO2 lasers (oscillation wavelength: 10.6 μm) are often used. If a fiber capable of transmitting these wavelengths in the mid-infrared region with high energy can be obtained, a wide range of applications will become possible.
中赤外用ファイバとしては、金属ハロゲン化物が用いら
れ、特に、臭化タリウム、よう化タリウムの固溶体（Ｋ
Ｈ２−５）を温間押出法により多結晶ファイバ化する方
法で製造されている。これは、次のような手順で行なわ
れる。まず、高純度なＫＨ２−５単結晶を製造し、押出
用コンテナに入るように円柱状に成形する（プリフォー
ム結晶）。これに、温度２００〜ａｏｏ’ｃで、圧力３
〜９ｔ ／ ｃ ｍ２を加えて、所定の径を持ったノズ
ルから押し出してファイバ化する。Metal halides are used as mid-infrared fibers, especially solid solutions of thallium bromide and thallium iodide (K
H2-5) is made into polycrystalline fiber by warm extrusion. This is done in the following steps. First, a high-purity KH2-5 single crystal is produced and molded into a cylindrical shape so as to fit into an extrusion container (preform crystal). To this, a temperature of 200~aoo'c and a pressure of 3
~9t/cm2 is added and extruded through a nozzle with a predetermined diameter to form a fiber.
発明が解決しようとする課題
ＫＨ２−５多結晶フアイバにＣＯ２レーザ光を通し、伝
送パワーをあげていくと、あるしきい値でファイバは劣
化する。従来の方法で製作されたファイバでは、損傷し
きい値が、１００Ｗ〜２００Ｗと、かなりばらつきが大
きく、安定した高エネルギー伝送用ファイバを得ること
は困難である。Problems to be Solved by the Invention When a CO2 laser beam is passed through a KH2-5 polycrystalline fiber and the transmission power is increased, the fiber deteriorates at a certain threshold. Fibers produced by conventional methods have a damage threshold that varies considerably, ranging from 100 W to 200 W, and it is difficult to obtain stable high-energy transmission fibers.
これは、プリフォーム結晶を押し出す際、押し出す方向
の結晶面方位を考えずに押し出していることによるもの
である。This is because the preform crystal is extruded without considering the crystal plane orientation in the extrusion direction.
本発明は、上述した課題を解決し、損傷しきい値のばら
つきの少ない、安定した高エネルギー伝送赤外用光ファ
イバを提供することを目的とする。An object of the present invention is to solve the above-mentioned problems and provide a stable high-energy transmission infrared optical fiber with less variation in damage threshold.
課題を解決するための手段
請求項１の本発明は、臭化タリウム、よう化タリウムの
固溶体を温間押出法によってファイバ化する方法におい
て、押出面の結晶方位を決めて押し出すことによって、
上記目的を達成する。Means for Solving the Problems The present invention as claimed in claim 1 is a method for forming a solid solution of thallium bromide or thallium iodide into a fiber by a warm extrusion method.
Achieve the above objectives.
作用
温間押出法で結晶を押し出す際、押出面の結晶方位によ
って、圧力が加わったときの結晶の流れ易さが違う。従
って、成形時の応力歪も押出面の結晶方位によって変わ
ってくる。ファイバの劣化要因の一つに、押出成形時の
応力歪による散乱があり、これを減少させることが、損
傷しきい値を高くすることになる。従って、本発明は、
成形時の応力歪が小さくなるような押出面の結晶方位を
選ぶことによって、安定した高エネルギー伝送赤外用フ
ァイバが得られる。When extruding crystals using the action warm extrusion method, the ease with which the crystals flow when pressure is applied varies depending on the crystal orientation of the extrusion surface. Therefore, the stress strain during molding also changes depending on the crystal orientation of the extruded surface. One of the causes of fiber deterioration is scattering due to stress strain during extrusion molding, and reducing this will increase the damage threshold. Therefore, the present invention
By selecting a crystal orientation of the extruded surface that minimizes stress strain during molding, a stable high-energy transmission infrared fiber can be obtained.
実施例 以下に、本発明の実施例を図面を用いて説明する。Example Embodiments of the present invention will be described below with reference to the drawings.
第１図は、本発明に係る赤外用光ファイバの製造方法の
実施に使用される光フアイバ製造装置の全体断面図であ
る。ｌは、プリフォーム結晶、２は多結晶赤外ファイバ
、３は、ファイバの太さを決めるダイス、４は、加圧用
コンテナ、５は、加熱用ヒーター ６は、上蓋を兼ねる
ガイド、７は、パンチ棒、８は、保持台である。FIG. 1 is an overall sectional view of an optical fiber manufacturing apparatus used to carry out the method for manufacturing an infrared optical fiber according to the present invention. l is a preform crystal, 2 is a polycrystalline infrared fiber, 3 is a die that determines the thickness of the fiber, 4 is a container for pressurization, 5 is a heater for heating, 6 is a guide that also serves as an upper lid, 7 is, The punch rod 8 is a holding stand.
ファイバの製造法を順を追って説明する。Ｋ Ｒ５−５
単結晶を、約１０ｍｍＸ１０＋＋＋ｎ＋角、長さ４０〜
５０ｍに、インゴットから切り出す。この時、１０ｎｗ
＋＋Ｘ１０＋ｗの面を、あらかじめ決めた結晶面になる
ように切り出す。これを、コンテナ４の形状に合うよう
に、７．６〜７．９１１ＩＩｌφの円柱状のプリフォー
ムに加工する。これをコンテナ４にセットし、温度をヒ
ーター５で２００〜３００°Ｃに設定して、油圧プレス
で３〜９ｔ／ｃｍ２の圧力なバンチ棒７に加えて押し出
すことによりファイバ化する。The fiber manufacturing method will be explained step by step. KR5-5
The single crystal is approximately 10 mm x 10 + + + n + square, length 40 ~
Cut out the ingot to a length of 50m. At this time, 10nw
Cut out the ++X10+w plane so that it becomes a predetermined crystal plane. This is processed into a cylindrical preform having a diameter of 7.6 to 7.911 IIlφ to match the shape of the container 4. This is set in a container 4, the temperature is set at 200 to 300°C with a heater 5, and the mixture is extruded into a fiber by applying pressure to a bunch rod 7 of 3 to 9 t/cm 2 with a hydraulic press.
押出面を、それぞれ（１１０）面、 （１１１）面、
（１１２）面として上記の方法で製造したＫＨ２−５多
結晶フアイバの、押出面と、長さ６ｌ−Ｉｌｌの短尺に
対する損傷しきい値の関係を表１に示す。The extruded surfaces are (110) plane, (111) plane, respectively.
Table 1 shows the relationship between the extrusion plane of the KH2-5 polycrystalline fiber manufactured as a (112) plane by the above method and the damage threshold for a short length of 6l-Ill.
表１ 押出面と損傷しきい値
（１１０）面方向に押し出したファイバの損傷しきい値
は、 （１１１）面、 （１１２）面方向に押し出した
ファイバの損傷しきい値に比べて約３５Ｗ低い。これは
、 （１１１）面及び（１１２）面方向に押し出したほ
うが、 （１１０）面方向に押し出した場合よりも結晶
が流れ易く、このため成形時の応力歪が小さくなるので
、散乱が少なく、損傷しきい値が上がるものである。従
って、押出面は、 （１１１）面、 （１１２）面が適
当であることが分かる。Table 1 Extrusion plane and damage threshold The damage threshold of the fiber extruded in the direction of the (110) plane is approximately 35 W lower than that of the fiber extruded in the direction of the (111) plane and (112) plane. . This is because crystals flow more easily when extruded in the (111) and (112) directions than when extruded in the (110) direction, which reduces stress strain during molding, resulting in less scattering. This increases the damage threshold. Therefore, it can be seen that (111) plane and (112) plane are suitable for the extrusion plane.
発明の効果
以上の説明から明らかなように、本発明は、ＫＨ２−５
結晶を温間押出法でファイバ化する際、押出面として適
当な結晶方位を決めることにより、成形時の応力歪を最
小に抑え、散乱を少なくして、レーザメスあるいはレー
ザ加工機などに、安定した高エネルギー伝送赤外用ファ
イバを提供することができるものである。Effects of the Invention As is clear from the above explanation, the present invention provides KH2-5
When converting crystals into fibers by warm extrusion, by determining an appropriate crystal orientation for the extrusion surface, stress distortion during molding can be minimized, scattering can be reduced, and a stable fiber can be created for use with laser scalpels or laser processing machines. It is possible to provide a high energy transmission infrared fiber.
図は、本発明に係る赤外用光フッ６イバの製造方法に用
いられる多結晶赤外ファイバの製造装置の縦断面図であ
る。
１・・・プリフォーム結晶、２・・・多結晶赤外ファイ
バ、３・・・ダイス、４・・・加工用コンテナ、５・・
・加熱用ヒーター ６・・・ガイド、７・・・パンチ棒
、８・・・保持台The figure is a longitudinal sectional view of a manufacturing apparatus for polycrystalline infrared fiber used in the method for manufacturing an infrared optical fiber according to the present invention. DESCRIPTION OF SYMBOLS 1... Preform crystal, 2... Polycrystalline infrared fiber, 3... Dice, 4... Container for processing, 5...
・Heating heater 6...Guide, 7...Punch rod, 8...Holding stand
Claims (2)
出法によってファイバ化する方法において、押出面の結
晶方位を決めて、押し出す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 manufacturing an infrared optical fiber, which is characterized in that a solid solution of thallium bromide or thallium iodide is made into a fiber by warm extrusion, and the extrusion is performed after determining the crystal orientation of the extruded surface.
押出面とする請求項１記載の赤外用光ファイバの製造方
法(2) The method for producing an infrared optical fiber according to claim 1, wherein either the (111) plane or the (112) plane of the crystal is the extruded plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161660A JPH0210304A (en) | 1988-06-29 | 1988-06-29 | Manufacture of infrared optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161660A JPH0210304A (en) | 1988-06-29 | 1988-06-29 | Manufacture of infrared optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210304A true JPH0210304A (en) | 1990-01-16 |
Family
ID=15739410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63161660A Pending JPH0210304A (en) | 1988-06-29 | 1988-06-29 | Manufacture of infrared optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210304A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5169421A (en) * | 1990-09-15 | 1992-12-08 | The Furukawa Electric Co., Ltd. | Method of manufacturing silica glass optical waveguide preform |
| CN100371749C (en) * | 2006-04-29 | 2008-02-27 | 北京交通大学 | Method for improving laser fiber end-face input power damage threshold |
| RU2504806C1 (en) * | 2012-06-18 | 2014-01-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" | Single-mode double-layer crystalline infrared light-guide |
-
1988
- 1988-06-29 JP JP63161660A patent/JPH0210304A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5169421A (en) * | 1990-09-15 | 1992-12-08 | The Furukawa Electric Co., Ltd. | Method of manufacturing silica glass optical waveguide preform |
| CN100371749C (en) * | 2006-04-29 | 2008-02-27 | 北京交通大学 | Method for improving laser fiber end-face input power damage threshold |
| RU2504806C1 (en) * | 2012-06-18 | 2014-01-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" | Single-mode double-layer crystalline infrared light-guide |
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