JPS58107504A - Production of optical fiber having light attenuating part - Google Patents

Production of optical fiber having light attenuating part

Info

Publication number
JPS58107504A
JPS58107504A JP56206052A JP20605281A JPS58107504A JP S58107504 A JPS58107504 A JP S58107504A JP 56206052 A JP56206052 A JP 56206052A JP 20605281 A JP20605281 A JP 20605281A JP S58107504 A JPS58107504 A JP S58107504A
Authority
JP
Japan
Prior art keywords
light
optical fiber
fiber
optical
irradiated
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
Application number
JP56206052A
Other languages
Japanese (ja)
Inventor
Fumio Wada
和田　史生
Hisashi Takamatsu
高松　久志
Norihisa Naganuma
典久 長沼
Takashi Yokota
横田　隆
Seiji Terai
寺井　清司
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56206052A priority Critical patent/JPS58107504A/en
Publication of JPS58107504A publication Critical patent/JPS58107504A/en
Pending legal-status Critical Current

Links

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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
    • G02B6/266—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator
    • 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
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/62—Surface treatment of fibres or filaments made from glass, minerals or slags by application of electric or wave energy; by particle radiation or ion implantation

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

PURPOSE:To obtain an optical fiber with which the connection is eliminated to a special light attenuator, by irradiating the radiant rays to the optical fiber to denature the material of the optical fiber itself and then using the denaturated part as a light attenuating part. CONSTITUTION:A light source 2 is provided at an end of an optical fiber 1, and a photodetector 3 is set at the other end to detect the light intensity. A shielding plate 5 made of lead is set at a part of the fiber 1 where a light attenuating part 6 is formed, and radiant rays 8 are irradiated at the part 6 from a radiant ray generator 7 through a radiant ray irradiating aperture part. With this irradiation of radiant rays, a grid defect is generated to the material of the fiber 1 of the irradiated part. Thus the fiber 1 is colored or blackened to increase the transmission loss of light. The intensity of the light given from the light source 2 is monitored by a photodetector 3 while the radiant rays are irradiated. Then the irradiation of radiant rays is discontinued when the quantity of attenuation reaches a prescribed level. In such a way, the light attenuating part 6 having desired attenuating characteristics is formed at a desired part of the fiber 1.

Description

【発明の詳細な説明】 （１）発明の技術分野 本発８１１社党滅曵部を有する光ファイバに関し、特に
その光減衰部の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to an optical fiber having an optical attenuator, and particularly relates to a method for manufacturing the optical attenuator.

（２）　　技術の背景 光１！！ｌ信システムにおいては、各１１光学的デバイ
スに所定の光量を入射させる九めに元ファイバにより伝
送された光量金デバイスに応じた所定光量まで減衰させ
る場合がある。このような光減衰手段として一般に光減
衰器が用いられている。(2) Background light of technology 1! ! In an optical communication system, after a predetermined amount of light is made incident on each of the 11 optical devices, the amount of light transmitted by the original fiber may be attenuated to a predetermined amount of light corresponding to the gold device. An optical attenuator is generally used as such optical attenuation means.

（３）　　従来技術と問題点 従来の光減衰器としては光を伝送する光ファイバを分断
し、両光７アイパ端面同士を間隔を隔てて対面させ間隔
量に応じて一方の光ファイバから他方の光ファイバへの
光伝送損失即ち光の減衰を得るように構成したものらる
いは分断した両党ファイバ端面間に着色ガラスあるいは
蒸着膜等の光の透過に障害となる材料を配置して伝送光
ｉを減衰させるように構成した光減衰器が使用されてい
る。しかしながら、このような光減衰器は減衰器筒体、
コネクタ、フランジあるいは光減衰部材等の部品を必要
とし、また所定の減衰量を得るための調整が面倒であり
組立ておよび光ファイバとの接続等に精度を要し製造が
簡単ではなかった。(3) Conventional technology and problems Conventional optical attenuators split the optical fiber that transmits light, make the end faces of both optical fibers face each other with a gap between them, and connect one optical fiber to the other according to the amount of the gap. Optical fibers are constructed to reduce optical transmission loss, that is, attenuation of light, or by placing materials that impede the transmission of light, such as colored glass or vapor-deposited films, between the end faces of the split fibers. An optical attenuator configured to attenuate i is used. However, such an optical attenuator has an attenuator cylinder,
It requires parts such as a connector, flange, or optical attenuation member, and is troublesome to adjust to obtain a predetermined amount of attenuation, and requires precision in assembly and connection to an optical fiber, making it difficult to manufacture.

（４）発明の目的 本発明は上記従来技術の欠点に鑑み々されたものであっ
て、光フアイバ自体の材質を一部変質させその部分を光
減衰部として別に光減衰器を接続することなく光量を減
衰可能な光減衰部を、有する光ファイバの製造方法の提
供を目的とする。(4) Purpose of the Invention The present invention has been made in consideration of the above-mentioned drawbacks of the prior art, and is made by changing a part of the material of the optical fiber itself and using that part as an optical attenuator without connecting a separate optical attenuator. An object of the present invention is to provide a method for manufacturing an optical fiber having an optical attenuation section capable of attenuating the amount of light.

（５）発明の構成 この目的を達成するため本発明においては、光ファイバ
に放射線を照射し、該放射線照射部に格子欠陥を発生さ
せて光減衰部を形成している。(5) Structure of the Invention In order to achieve this object, in the present invention, an optical fiber is irradiated with radiation, and a lattice defect is generated in the radiation irradiated portion to form an optical attenuation portion.

（６）　　発明の実施例 図面は本発明方法の実施状態を示す構成図である。光フ
ァイバ１の一端に光源２を設置し、他端に光強度を検知
する光検出器３を設置する。この光ファイバ１の光減衰
部６を形成すべき位置に鉛からなるシールド板５を配置
しその放射線照射用開口部４を通して放射線発生装置７
より放射線８（例えばｒｍ）を照射する。放射線照射に
よシ照射部の光フアイバ構成物質に格子欠陥が発生して
光ファイバを着色したシ黒色化させ光ファイバの光伝送
損失を増加させる。光検出器３により光ファイバ１を介
して光源２より伝送される光強度をモニターしながら放
射線を照射し所望の減衰量に達したら放射線照射を中止
する。このようにして光ファイバ１の所望の位置に所望
の減衰特性の光減衰部６が形成される。このとき、放射
線照射速度のコントロールにより減衰量の精度をコント
ロールできる。一般の物質は放射線の照射により光伝送
損失が大きくなるため、本発明は光ファイバに限らず他
の光伝送路、光導波路等にも適用可能である。(6) Embodiments of the invention The drawings are configuration diagrams showing the implementation state of the method of the invention. A light source 2 is installed at one end of the optical fiber 1, and a photodetector 3 for detecting light intensity is installed at the other end. A shield plate 5 made of lead is placed at the position where the optical attenuator 6 of the optical fiber 1 is to be formed, and the radiation generating device 7 is passed through the opening 4 for radiation irradiation.
Radiation 8 (for example, rm) is irradiated. Radiation irradiation generates lattice defects in the constituent materials of the optical fiber at the irradiated portion, causing the optical fiber to become colored and black, thereby increasing the optical transmission loss of the optical fiber. Radiation is irradiated while monitoring the intensity of light transmitted from the light source 2 via the optical fiber 1 by the photodetector 3, and when a desired amount of attenuation is reached, the radiation irradiation is stopped. In this way, the optical attenuation section 6 having desired attenuation characteristics is formed at a desired position of the optical fiber 1. At this time, the accuracy of the attenuation amount can be controlled by controlling the radiation irradiation speed. Since optical transmission loss of ordinary materials increases when irradiated with radiation, the present invention is applicable not only to optical fibers but also to other optical transmission lines, optical waveguides, and the like.

（７）発明の詳細 な説明したように、本発明方法を用いれば簡単に所望の
減衰特性の光減衰部が光ファイバに形成されるため、従
来必要であった固定減衰器の部品を大幅に減少させるこ
とができかつコネクタ、７ランジ等の接続部分での減衰
量変動をなくすことが可能になる。(7) As explained in detail about the invention, by using the method of the present invention, an optical attenuator with a desired attenuation characteristic can be easily formed in an optical fiber, so the number of fixed attenuator parts that were conventionally required can be greatly reduced. It is possible to reduce the amount of attenuation and eliminate fluctuations in attenuation at connection parts such as connectors and 7-lunges.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明方法の実施状態を示す構成図である。 １・・・光ファイバ、２・・・光源、３・・・光検出器
、５・・・シールド板、６・・・光減衰部、７・・・放
射線照射装置、８・・・放射線。 特許出願人 富士通株式会社 特許出願代理人 弁理士　青　木　　　朗 弁理士西舘和之 弁理士内田辛男 弁理士　山　口　昭　之The drawing is a block diagram showing the implementation state of the method of the present invention. DESCRIPTION OF SYMBOLS 1... Optical fiber, 2... Light source, 3... Photodetector, 5... Shield plate, 6... Light attenuation part, 7... Radiation irradiation device, 8... Radiation. Patent applicant Fujitsu Ltd. Patent application agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Takeo Uchida Patent attorney Akira Yamaguchi

Claims (1)

【特許請求の範囲】[Claims] ｌ　光ファイバに放射線を照射し、該放射線照射部に格
子欠陥を発生させて光減衰部を形成する光減衰部を有す
る光ファイバの製造方法。1. A method for manufacturing an optical fiber having an optical attenuation section, which irradiates the optical fiber with radiation and generates lattice defects in the radiation irradiation section to form an optical attenuation section.
JP56206052A 1981-12-22 1981-12-22 Production of optical fiber having light attenuating part Pending JPS58107504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56206052A JPS58107504A (en) 1981-12-22 1981-12-22 Production of optical fiber having light attenuating part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56206052A JPS58107504A (en) 1981-12-22 1981-12-22 Production of optical fiber having light attenuating part

Publications (1)

Publication Number Publication Date
JPS58107504A true JPS58107504A (en) 1983-06-27

Family

ID=16517075

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56206052A Pending JPS58107504A (en) 1981-12-22 1981-12-22 Production of optical fiber having light attenuating part

Country Status (1)

Country Link
JP (1) JPS58107504A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6410704U (en) * 1987-07-09 1989-01-20
WO1999063373A1 (en) * 1998-06-04 1999-12-09 Bookham Technology Plc Optical waveguide attenuation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6410704U (en) * 1987-07-09 1989-01-20
WO1999063373A1 (en) * 1998-06-04 1999-12-09 Bookham Technology Plc Optical waveguide attenuation

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