JPS60118807A - Production of optical fiber for high-output infrared laser - Google Patents
Production of optical fiber for high-output infrared laserInfo
- Publication number
- JPS60118807A JPS60118807A JP58227335A JP22733583A JPS60118807A JP S60118807 A JPS60118807 A JP S60118807A JP 58227335 A JP58227335 A JP 58227335A JP 22733583 A JP22733583 A JP 22733583A JP S60118807 A JPS60118807 A JP S60118807A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber
- core
- crystal
- finished
- 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 55
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000013078 crystal Substances 0.000 claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000005253 cladding Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000010574 gas phase reaction Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 239000002585 base Substances 0.000 abstract description 8
- 238000005498 polishing Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 229910052716 thallium Inorganic materials 0.000 abstract description 5
- 239000012808 vapor phase Substances 0.000 abstract description 5
- 238000005229 chemical vapour deposition Methods 0.000 abstract description 4
- 150000004820 halides Chemical class 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 3
- -1 silver halide Chemical class 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 239000006260 foam Substances 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000149 argon plasma sintering Methods 0.000 description 2
- LYQFWZFBNBDLEO-UHFFFAOYSA-M caesium bromide Chemical compound [Br-].[Cs+] LYQFWZFBNBDLEO-UHFFFAOYSA-M 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 108091006629 SLC13A2 Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000007740 vapor deposition 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
-
- 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]
- C03B37/018—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] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
-
- 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
- G02B6/102—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type for infrared and ultraviolet radiation
-
- 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"
-
- 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
- C03B2201/86—Chalcogenide glasses, i.e. S, Se or Te glasses
Abstract
Description
【発明の詳細な説明】
〔本発明の技術分野〕
本発明は、高出力赤外レーザー用、特に炭酸ガスレーザ
ー用光ファイバの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing an optical fiber for high-power infrared lasers, particularly for carbon dioxide lasers.
近年高出力赤外レーザー例えば１０．６μｍの炭酸ガス
レーザー等の開発が進み、レーザー加工機およびレーザ
ーメスの応用が盛んである。In recent years, high-power infrared lasers such as 10.6 μm carbon dioxide lasers have been developed, and their applications in laser processing machines and laser scalpels have become popular.
レーザー光の導光路には、ミラーおよびレンズからなる
多関ｊＩｉＴ型導光路方式と、光ファイバによる方式が
あるが、自由度や光軸調節の容易さなどの機能性の点で
光フアイバ方式が優れていると考えらＪし、ＮａＣ（５
，ＫＣｌｆｒ、どのアルカリハライド系光））′イバ、
クリラムハライド系光ファイバ、タリウムハシイド混晶
光ファイバ、金属ハライド光ファイバなどのＩＩ）１究
が盛んである。ファイバの作成方試作されている。There are two types of light guide path for laser light: a multi-sensor jIiT light guide path method consisting of mirrors and lenses, and a method using optical fibers, but the optical fiber method is preferred in terms of functionality such as degree of freedom and ease of adjusting the optical axis. Thought to be superior, NaC (5
, KClfr, which alkali halide light))'iba,
II) Research on Kuril halide optical fibers, thallium hashide mixed crystal optical fibers, metal halide optical fibers, etc. is active. A prototype of how to make the fiber has been made.
しかしながら、押し出し法による多結晶ファイバにおい
ては、光フアイバ結晶は、コンテナ中で加熱溶融後、ダ
イス穴から押し出されるため不純物が混入し、不純物吸
収が増大する欠点を有している。−！た、結晶粒径の制
御が困難であり、粒界での散乱が大きくなる。さらに、
ファイバ内部に気泡、り）ツクが発生しやすく、光散乱
が生じ、また、ファイバ表面の粗さが太き（散乱が生じ
やすいなどの欠点を有している。However, in polycrystalline fibers produced by extrusion, the optical fiber crystal is extruded from a die hole after being heated and melted in a container, which has the drawback of contamination with impurities and increased absorption of impurities. -! In addition, it is difficult to control the crystal grain size, and scattering at grain boundaries becomes large. moreover,
It has drawbacks such as air bubbles and cracks being easily generated inside the fiber, causing light scattering, and the fiber surface being rough (easily causing scattering).
一方、引き上げ法ないしは引き下げ法による単結晶ファ
イバにおいては、光フアイバ結晶は、溶融保持されるた
め、保持容器壁面より不純物の混入が生じやすく不純物
吸収が生じやすい。また、溶融したファイバ結晶から、
ファイバが引き上げ、引−き下げられ固化する時にクラ
ックが生じやすく、散乱吸収が生じる。さらに溶融固化
する場合結晶内部に気泡が発生しやすく、散乱吸収が生
じやすい欠点を有している。On the other hand, in a single crystal fiber produced by a pulling method or a pulling method, since the optical fiber crystal is molten and held, impurities are likely to be mixed in from the wall surface of the holding container and impurity absorption is likely to occur. Also, from molten fiber crystal,
When the fiber is pulled up, pulled down, and solidified, cracks are likely to occur, causing scattering and absorption. Furthermore, when melting and solidifying, bubbles are likely to be generated inside the crystal, which has the disadvantage that scattering and absorption are likely to occur.
さらに、光ファイバの実用化のためにはクラッド一層の
形成いわゆる、コアークラッド方式の光ファイバの製作
が重要である。すなわち、光フアイバ自身を保護し、外
部からのキズの発生をおさえるため、光ファイバの曲げ
や衝撃に対する強度を向上させるためにコアークラッド
方式が重要である。Furthermore, for the practical use of optical fibers, it is important to manufacture optical fibers with a single layer of cladding, that is, the so-called core-clad method. That is, the core-clad method is important in order to protect the optical fiber itself, suppress the occurrence of scratches from the outside, and improve the strength of the optical fiber against bending and impact.
しかしながら、上記のファイバの製作方法において、現
実には、ＫＨ２−５コアにＫＨ２−６を蒸着する方法ふ
・よびＡｇＣ１にＡｇＢｒを製作する方が試みられてい
るが有効な手段に乏しい。However, in the method for manufacturing the above-mentioned fiber, in reality, methods of vapor depositing KH2-6 on the KH2-5 core and manufacturing AgBr on AgC1 have been tried, but effective means are lacking.
このように現存するファイバの作成方法は、いづれもそ
れぞれ上記した欠点を有しており、その１１′１′１果
として、伝送Ｊ工４失が大きく、また、ファイバ作成歩
留りも良くなく、新しい光フアイバ作成方法が望まれて
いた。In this way, all of the existing fiber manufacturing methods have the above-mentioned drawbacks, and as a result, there is a large loss of transmission J4, and the fiber manufacturing yield is not good. A method for making optical fibers was desired.
本発明は、上記欠点を解消し、そして、コアークラッド
構造を有する伝送損失が小さい高出力赤外レーリ′−用
光ファイバの新規な製造方法を提供゛Ｊ−ることをＬＩ
的とするものである。The present invention solves the above-mentioned drawbacks and provides a novel method for manufacturing a high-power infrared Rayleigh optical fiber having a core-clad structure and low transmission loss.
The target is
そして、本発明は、上記目的を達成する手段として、光
フアイバ結晶母材より、加熱あるいは溶ｌｉ’ｌ’、ｌ
！することすく、機械加工のみで、ファイバを作成し、
クラッド層を気相コーティングする方法である。すなわ
ち、本発明は、光フアイバ母材結晶から、切断あるいは
研削により、ファイバ仕上り断面より大きな断面を有す
る光フアイバ素材を作成し、さらにその光フアイバ素材
を研ＪＭすることにより、所望の直径に仕上げた後、光
ファイバのクラッド層を気相反応によりコーティングす
ることを特徴とする高出力赤外レーザー用光フアイバの
製造方法である。As a means to achieve the above object, the present invention provides heating or melting li'l', l, from an optical fiber crystal base material.
! Simply create a fiber using just machining.
This is a method of vapor phase coating the cladding layer. That is, the present invention creates an optical fiber material having a cross section larger than the finished fiber cross section from an optical fiber base material crystal by cutting or grinding, and further grinds the optical fiber material to finish it to a desired diameter. This method of manufacturing an optical fiber for high-power infrared lasers is characterized in that the cladding layer of the optical fiber is coated by a gas phase reaction.
本発明を第１図に基づいて詳肩■に説明する。この図は
本発明の加工工程を示すブロック図である。The present invention will be explained in detail based on FIG. This figure is a block diagram showing the processing steps of the present invention.
まず、高品質の光フアイバ結晶母材より、切断、研削お
よび切削工程により、仕上げ直径より大きな光フアイバ
素材を作成する。First, an optical fiber material larger than the finished diameter is created from a high-quality optical fiber crystal base material through cutting, grinding, and cutting processes.
次いで端面を仕上げた後、光フアイバ素材を、ラッピン
グ、ポリシングすることにより所望の直径に仕上げて、
光ファイバを製造）る。なお、端面加工は、加工中のい
ずれの工程でも良い。仕上げられた光ファイバにそれ自
身をコアとして、気相反応によりコアより低い屈折率を
持つ物質をコーティングし、コアークラッド構造の光フ
ァイバが完成される。After finishing the end face, the optical fiber material is finished to the desired diameter by lapping and polishing.
manufactures optical fiber). Note that end face processing may be performed at any step during processing. The finished optical fiber is coated with a material having a lower refractive index than the core using a gas-phase reaction, thereby completing an optical fiber with a core-clad structure.
本発明における高出力赤外レーザー用光フアイバは、ア
ルカリハライド系光ファイバ（ＫＣ１！、ＮａＣ１！。The optical fiber for high-power infrared laser in the present invention is an alkali halide optical fiber (KC1!, NaC1!).
ＫＢｒ＋ＣｓＢｒ ）、金属ハライド（ｋｇｃｌ 、Ａ
ｇＢｒ ）、タリウム系光ファイバ（タリウムハライド
、タリウムハライド混晶）、Ｉ＋−Ｖｌ族化合物および
その混晶光ファイバ（Ｚｎ５ｅ＋ＺｎＳ＋Ｚｎ５ｘＳｅ
ｌ −ｘ ）など、どのファｆバにも適用できるもので
あり、そして、このファイバＩｉＪ’ ４’Ａ’ ＃＋
！を品は、どのような製法で作成された・ムのでも良い
が、より適するのは、気相反応により作成された母拐結
晶を使用する場合である。ま／こ、本発明において光フ
アイバ母材結晶の切断手！生としては、内周式スライサ
ー、外周式スライサー、バンドソー（Ｂａｎｄｓａｗ
）などの切断方法のいり゛れでも良＜ 、Ｉｔｕｉ面形
状は四角形、六角形いずれの形状でもよい。KBr+CsBr), metal halide (kgcl, A
gBr), thallium-based optical fibers (thallium halide, thallium halide mixed crystal), I+-Vl group compounds and their mixed crystal optical fibers (Zn5e+ZnS+Zn5xSe
l −x ), and can be applied to any fiber such as IiJ'4'A'#+
! The product may be produced by any method, but it is more suitable to use a matrix crystal produced by a gas phase reaction. Ma/ko, the cutting hand of the optical fiber base material crystal in the present invention! For raw materials, there are internal slicers, external slicers, and bandsaws.
) may be used, and the surface shape may be either quadrilateral or hexagonal.
ま／こ、本発明において光フアイバ素材の研磨手段とし
ては、メカニカル研磨、メカノケミカル研磨、ケミカル
研磨、フロート研磨、液中研磨などいずれの方法でもよ
く、また、研磨のポリシャおよび砥粒、分散媒体はいず
れでも良い。クラッド層を形成するための気相コーティ
ング法は、化学気＋１１堆積法（以下ＣＶＤ法と称す）
、蒸着法、イオンブレーティング法、スパッタリング法
など気相によるコーティング法ならばいづれでも良い。In the present invention, the optical fiber material may be polished by any method such as mechanical polishing, mechanochemical polishing, chemical polishing, float polishing, or submerged polishing. Either is fine. The vapor phase coating method for forming the cladding layer is the chemical vapor +11 deposition method (hereinafter referred to as CVD method).
Any vapor phase coating method such as vapor deposition, ion blating, or sputtering may be used.
以下実施例に基づき説明する。 The following will be explained based on examples.
化学気相堆積法により合成されたＺｎ５ｅ 多結晶から
、内周式スライサーにて１．２ ｘ’１．２ ｘ １０
０ＩｕＬ の角柱状結晶を切り出した。From Zn5e polycrystal synthesized by chemical vapor deposition method, 1.2 x'1.2 x 10 with an internal slicer
A prismatic crystal of 0 IuL was cut out.
次に、ダイヤモンド砥石により、外周研削し、直径１肱
の円柱状結晶に仕上げ、光フアイバ素材とし、ここで端
面を仕上げた。次に、光フアイバ素材を研磨にて０．７
＃ｒｎＸｘ １００ ｍＸＬの光ファイバに仕上げた
。その後、これの光ファイバにクラッド層を形成するた
めＺｎ蒸気とＨａｓ ガスを用いたＣＶＤ法によりＺｎ
Ｓを光フアイバ表面にＱ、１ｍＮの厚さにコーティング
し、コアークラッド方式の光ファイバとした。Next, the outer periphery was ground using a diamond grindstone to form a cylindrical crystal with a diameter of one elbow, which was used as an optical fiber material, and the end face was finished here. Next, the optical fiber material was polished to 0.7
Finished into #rnXx 100 mXL optical fiber. Then, to form a cladding layer on this optical fiber, Zn was deposited by CVD using Zn vapor and Has gas.
The surface of the optical fiber was coated with S to a thickness of 1 mN to form a core-clad optical fiber.
この方法にて製造したコアークラッド方式のＺｎ５ｅ
光ファイバは次の（１） −（５）の特性を示し、炭酸
ガス用光ファイバとして、十分なものであることがわか
った。Core-clad Zn5e manufactured using this method
The optical fiber exhibited the following characteristics (1) to (5) and was found to be sufficient as an optical fiber for carbon dioxide gas.
（１）可とう性 良好。(1) Good flexibility.
（２）伝送損失 ０．５２ ｄＢ／ｍ ０（３）化学気
相堆積法により合成されたＺｎ５ｅ 多結晶の粒径は、
７０μｍであり、ファイバー成形後も７０μｍ と変化
がない。(2) Transmission loss 0.52 dB/m 0 (3) The grain size of Zn5e polycrystal synthesized by chemical vapor deposition method is
The diameter is 70 μm, and it remains 70 μm even after fiber molding.
（４）ファイバー表面粗さは非常に小さく、このための
散乱の影響がない。(4) The fiber surface roughness is very small, so there is no scattering effect.
（５）クラッドＫＷとコア層の付着性良好。(5) Good adhesion between cladding KW and core layer.
本発明は、以上詳記したように、ファイバ結晶ＩｉＪ材
より、加熱あるいは溶融することなしに、機械加工によ
り製造するため、不純物の混入がなく、不純物による吸
収損失が生じないものである。As described in detail above, the present invention is manufactured from fiber crystal IiJ material by machining without heating or melting, so there is no contamination of impurities and absorption loss due to impurities does not occur.
また１本発明にふ・いて−は、ファイバ結晶母材の品質
が維持できるため気泡の発生がなく、母材の結晶粒径が
維持でき、ファイバ加工での結晶粒の変化がなく、最適
結晶粒が維持できる効果が生ずるものである。Another feature of the present invention is that the quality of the fiber crystal base material can be maintained, so there is no generation of bubbles, the crystal grain size of the base material can be maintained, and there is no change in the crystal grains during fiber processing, resulting in optimal crystallization. This produces the effect that grains can be maintained.
さらに、本発明においては、ファイバを研磨によって仕
上げるため、粗さが小さく光散乱が小さくなり、また、
押し出し法に比ベファイバーの表面加工影響層が小さく
、光吸収が小さいものが製造できる。Furthermore, in the present invention, since the fiber is finished by polishing, the roughness is small and light scattering is small, and
Compared to the extrusion method, fibers with a smaller layer affected by surface treatment and less light absorption can be produced.
さらに、本発明においては、気相コーティングによりク
ラッド層を形成できるため、コアークラッド方式の光フ
ァイバの作成が可能であり、コア層が保護され、取扱い
も容易となる。Furthermore, in the present invention, since the cladding layer can be formed by vapor phase coating, it is possible to create a core-clad optical fiber, the core layer is protected, and handling becomes easy.
本発明は、以上の結果、伝送損失が小さいコアークラッ
ド方式の光ファイバが得られる顕著な効果が生じるもの
であり、また、本発明は多結晶および単結晶いずれのフ
ァイバー製造法にも適するものである。As a result of the above, the present invention has the remarkable effect of providing a core-clad optical fiber with low transmission loss, and is suitable for both polycrystalline and single-crystalline fiber manufacturing methods. be.
第１図は本発明を説明するためのブロック図である。 FIG. 1 is a block diagram for explaining the present invention.
Claims (1)
より、ファイバ仕上り断面より大きな断面を有する光フ
アイバ素材を作成し、さらにその光フアイバ素材を研磨
することにより、所望の直径に仕上げた後、この光ファ
イバのクラッド層を気相反応によりコーティングするこ
とを特徴とする高出力赤外レーザー用光ファイバの製造
方法。(1) Cutting or grinding Qζ from the optical fiber base material crystal
In this method, an optical fiber material having a cross section larger than the finished fiber cross section is created, and the optical fiber material is further polished to a desired diameter, and then the cladding layer of this optical fiber is coated by a gas phase reaction. A method for manufacturing an optical fiber for high-power infrared lasers, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58227335A JPS60118807A (en) | 1983-11-30 | 1983-11-30 | Production of optical fiber for high-output infrared laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58227335A JPS60118807A (en) | 1983-11-30 | 1983-11-30 | Production of optical fiber for high-output infrared laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60118807A true JPS60118807A (en) | 1985-06-26 |
Family
ID=16859192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58227335A Pending JPS60118807A (en) | 1983-11-30 | 1983-11-30 | Production of optical fiber for high-output infrared laser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60118807A (en) |
-
1983
- 1983-11-30 JP JP58227335A patent/JPS60118807A/en active Pending
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