KR100211727B1 - Optical fiber manufacture method for optical attenuator - Google Patents

Optical fiber manufacture method for optical attenuator Download PDF

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KR100211727B1
KR100211727B1 KR1019970003135A KR19970003135A KR100211727B1 KR 100211727 B1 KR100211727 B1 KR 100211727B1 KR 1019970003135 A KR1019970003135 A KR 1019970003135A KR 19970003135 A KR19970003135 A KR 19970003135A KR 100211727 B1 KR100211727 B1 KR 100211727B1
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optical fiber
optical
manufacturing
attenuator
hydrogen
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KR1019970003135A
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Korean (ko)
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KR19980067221A (en
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강병윤
서재태
송용원
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권문구
엘지전선주식회사
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    • 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
    • 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
    • G02B5/00—Optical elements other than lenses
    • G02B5/003—Light absorbing elements
    • 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
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

본 발명은 광섬유의 제조방법에 관한 것으로, 특히 광감쇄기용에 있어서 높은 흡수율을 갖는 광섬유의 제조를 위해 광섬유의 제조방법을 개량하여 광감쇄기용 광섬유를 제조하도록 한 광감쇄기용 광섬유 제조방법에 관한 것으로, 본 발명의 구체적인 수단으로 수소를 사용하여 버블러내에 저장되어 있는 원료를 튜브내에 공급하여 증착한 후 인발하여 광섬유를 제조함을 특징으로 하고, 다른 구체적인 수단으로 확산을 이용하여 광섬유 코아내에 광흡수율이 높은 전이금속을 용액으로 도핑하여 광섬유를 제조함을 특징으로 함으로써, 본 발명은 광섬유의 광흡수 손실을 조절하여 광감쇄에 요구되는 사양에 맞도록 제조함으로써 제조가 간편하고 다양한 용도의 광감쇄기를 얻을 수 있으며, 광감쇄기의 제조비용을 낮출 수 있고, 수소의 유량이나 수소의 농도를 조절함으로써 코아내의 흡수율 조절이 용이하게 되는 효과가 있다.The present invention relates to a method for manufacturing an optical fiber, and more particularly, to an optical attenuator optical fiber manufacturing method for manufacturing an optical attenuator by improving an optical fiber manufacturing method for manufacturing an optical fiber having a high absorption rate in an optical attenuator. By using hydrogen as a specific means of the present invention, the raw material stored in the bubbler is deposited in a tube to be deposited, and then drawn to manufacture an optical fiber. The optical fiber is manufactured by doping the high transition metal with a solution, and the present invention is manufactured by adjusting the optical absorption loss of the optical fiber to meet the specifications required for optical attenuation, thereby making the optical attenuator simple and versatile. Can reduce the manufacturing cost of the optical attenuator, By adjusting the concentration, it is possible to easily control the absorption rate in the core.

Description

광감쇄기용 광섬유 제조방법Optical fiber manufacturing method for optical attenuator

본 발명은 광섬유의 제조방법에 관한 것으로, 특히 광감쇄기용에 있어서 높은 흡수율을 갖는 광섬유의 제조를 위해 광섬유의 제조방법을 개량하여 광감쇄기용 광섬유를 제조하도록 한 광감쇄기용 광섬유 제조방법에 관한 것이다.The present invention relates to a method for manufacturing an optical fiber, and more particularly, to an optical attenuator optical fiber manufacturing method for manufacturing an optical attenuator by improving the optical fiber manufacturing method for manufacturing an optical fiber having a high absorption rate in an optical attenuator. .

종래의 광감쇄기는 박막필름을 콘넥터의 페룰(ferrul)내부에 삽입한 구조로서 페룰과 페룰 사이에 공기격차를 두거나 광섬유 코아를 부정합시키거나 페룰 사이에 불순물의 농도가 높은 광섬유를 일반 광섬유와 접속하여 사용한다.The conventional optical attenuator is a structure in which a thin film is inserted into a ferrule of a connector, and there is an air gap between the ferrule and the ferrule, mismatching fiber cores, or connecting an optical fiber having a high impurity concentration between the ferrules with a general optical fiber. use.

또한, 광감쇄기중 페룰 사이에 필터를 삽입하거나 에어갭 및 코아의 부정합 등은 광감쇄기의 제조에 있어 많은 어려움이 따르고, 페룰내에 불순물이 높은 광섬유를 일반 광섬유와 접속하여 사용하므로 요구되는 손실을 얻기가 어렵다.In addition, inserting a filter between ferrules or mismatching of air gaps and cores in the optical attenuator requires a lot of difficulties in manufacturing the optical attenuator. Is difficult.

이와 같이 종래의 광섬유의 제조방법에 있어서는 광감쇄기중 페룰 사이에 필터를 삽입하거나 에어갭 및 코아의 부정합 등은 광감쇄기의 제조에 있어 많은 어려움이 따르고, 페룰내에 불순물이 높은 광섬유를 일반 광섬유와 접속하여 사용함으로써 요구되는 손실을 얻기 어려운 문제점이 있었다.As described above, in the conventional optical fiber manufacturing method, inserting a filter between ferrules in the optical attenuator or mismatching of air gaps and cores causes a lot of difficulties in manufacturing the optical attenuator. There was a problem that it is difficult to obtain the required loss by using.

따라서, 본 발명의 목적은 광섬유 제조방법을 개량하여 광섬유의 흡수손실을 높혀 광감쇄기에서 요구되는 손실값을 갖도록 조절함으로써 상기의 문제점을 해결한다.Therefore, an object of the present invention is to solve the above problems by improving the optical fiber manufacturing method to increase the absorption loss of the optical fiber to have a loss value required in the optical attenuator.

상기의 목적을 달성하기 위한 본 발명의 구체적인 수단으로 수소를 사용하여 버블러내에 저장되어 있는 원료를 튜브내에 공급하여 증착한 후 인발하여 광섬유를 제조함을 특징으로 하고, 다른 구체적인 수단으로 확산을 이용하여 광섬유 코아내에 광흡수율이 높은 전이금속을 용액으로 도핑하여 광섬유를 제조함을 특징으로 함으로써 달성된다.As a specific means of the present invention for achieving the above object is characterized in that the raw material stored in the bubbler using hydrogen as a raw material in the tube to be deposited and then drawn to produce an optical fiber, using diffusion as another specific means The optical fiber is manufactured by doping a transition metal having a high light absorption in the optical fiber core with a solution.

제1도는 본 발명 코아내에 전이금속을 도핑하는 공정도의 일실시예.1 is an embodiment of a process diagram for doping transition metal into the core of the present invention.

제2도는 본 발명 수소를 이용한 광섬유 제조설비 개략도의 다른 일실시예.2 is another embodiment of the schematic diagram of an optical fiber manufacturing facility using hydrogen of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 튜브 2 : 부분 유리화층1 tube 2 partial vitrification layer

3 : 토치 4 : 클래드 증착층3: torch 4: clad deposition layer

5 : 전이금속 용액 6 : 퍼지5: transition metal solution 6: purge

7 : 로터리 콘넥터 8 : 선반7: rotary connector 8: shelf

9A, 9B : 유량조절기(MFC) 10A, 10B : 공기압 밸브9A, 9B: Flow regulator (MFC) 10A, 10B: Pneumatic valve

11 : 버블러 12 : 원료11: bubbler 12: raw material

이하에서 본 발명의 바람직한 실시 예를 첨부한 도면에 의거 상세히 설명하면 다음과 같다.Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

제1도는 본 발명 코아내에 전이금속을 도핑하는 공정도의 일실시 예로서, 이에 도시한 바와 같이 광섬유 코아내에 확산을 이용하여 전이금속을 도핑하여 흡수율을 조절하는 방법으로서 클래드 층까지는 일반적인 광섬유 제조공정과 동일하나 코아 증착시 약간 낮은 온도에서 코아층을 증착하여 부분 유리화층(2)을 만들고, 튜브(1)를 MCVD(Modified Chemical Vaper Deposition) 설비에서 분리시켜 전이금속이 녹아있는 용액속(5)에 수분간 담그는데, 이때 담근시간과 용액내의 전이금속 농도를 조절하여 원하는 크기의 흡수율을 얻으며, MCVD 설비에 걸어 코아를 유리화시키고 설비내에 다시 부착하여 튜브(1)를 붙이고 인발하는 공정을 거쳐 광쇄기용 광섬유를 만든다.1 is an example of a process diagram of doping a transition metal in a core of the present invention. As shown in FIG. 1, a method of controlling absorption by doping a transition metal using diffusion in an optical fiber core is provided to a clad layer and a general optical fiber manufacturing process. In case of core deposition, the core layer is deposited at a slightly lower temperature to form a partial vitrification layer 2, and the tube 1 is separated from a modified chemical vapor deposition (MCVD) facility in a solution (5) in which a transition metal is dissolved. Soak for a few minutes. At this time, the absorption time of the desired size is obtained by adjusting the immersion time and the concentration of the transition metal in the solution. Make optical fiber

제2도는 본 발명 수소를 이용한 광성유 제조설비 개략도의 다른 일실시 예로서, 이에 도시한 바와 같이 소스의 공급시나 반응시에 반응시의 분위기를 수소로 채워주는 방법으로서 클래드 공정까지는 일반적인 광섬유 제조공정과 동일하고, 코아 증착시 수소를 사용하여 버블링하거나 챔버내의 분위기를 수소 분위기로 만들어 코아내에 OH기를 도핑하여 광감쇄를 위해 필요한 흡수율을 얻는데, 이때 흡수율은 OH 농도에 비례하므로 버블링시의 수소유량과 수소분위기의 농도를 조절하여 필요한 흡수율을 얻는다.2 is another embodiment of a schematic diagram of a mineral oil manufacturing facility using hydrogen according to the present invention. As shown in FIG. 2, a method of filling a atmosphere with hydrogen during reaction of a source or a reaction as a clad process is a general optical fiber manufacturing process. It is the same as, and bubbling using hydrogen at the time of core deposition or making the atmosphere in the chamber into a hydrogen atmosphere to dope the OH group in the core to obtain the necessary absorption for light attenuation, the absorption rate is proportional to the OH concentration, hydrogen at bubbling Adjust the flow rate and the concentration of the hydrogen atmosphere to obtain the required absorption.

또한, OH 1ppm당 48dB의 손실값을 얻으므로 이를 토대로 광섬유내의 흡수율을 조절하여 대략 10000∼20000ppm 정도로 OH기를 도핑시켜 필요한 광감쇄기용 광섬유를 제조한다.In addition, since a loss value of 48 dB per 1 ppm of OH is obtained, the absorption rate in the optical fiber is adjusted to dope the OH group at about 10000 to 20000 ppm, thereby manufacturing the optical fiber for the optical attenuator.

그리고, 수소가스를 사용하여 버블러(11) 내에 담겨있는 원료(12)를 튜브(1)내로 공급하여 증착한 후 인발하여 광섬유를 만드는데, 상기 튜브(1)를 선반(8)에 걸어 로타리 컨넥터(7)에 연결하여 장착하고 클래드 층까지 증착을 실시한 후 다른 쪽 라인으로 코아층의 증착시 수소를 버블링 가스로 사용하여 증착을 실시한다.In addition, the raw material 12 contained in the bubbler 11 using hydrogen gas is supplied into the tube 1 to be deposited and then drawn to make an optical fiber. The tube 1 is hung on the shelf 8 to rotate a rotary connector. Attached to (7), mounted, and deposited to the cladding layer, the deposition is carried out using hydrogen as a bubbling gas when the core layer is deposited to the other line.

또한, 버블러(11)로 공급되는 산소와 수소를 온/오프 할 수 있도록 공기압 밸브(10A)(l0B)를 설치하고, 유량의 조절은 유량조절기(MFC: Mass Flow Controller)(9A)(9B)를 사용하여 조절한다.In addition, a pneumatic valve 10A (10B) is provided to turn on / off oxygen and hydrogen supplied to the bubbler 11, and the flow rate is controlled by a mass flow controller (MFC) 9A (9B). Use) to adjust.

이상에서 상세히 설명한 바와 같이 본 발명은 광섬유의 광흡수 손실을 조절하여 광감쇄에 요구되는 사양에 맞도록 제조함으로써 제조가 간편하고 다양한 용도의 광감쇄기를 얻을 수 있으며, 광감쇄기의 제조비용을 낮출 수 있고, 수소의 유량이나 수소의 농도를 조절함으로써 코아내의 흡수율 조절이 용이하게 되는 효과가 있다.As described in detail above, the present invention is easy to manufacture and obtains an optical attenuator for various uses by adjusting the optical absorption loss of the optical fiber to meet the specifications required for optical attenuation, and can lower the manufacturing cost of the optical attenuator. There is an effect that the absorption rate in the core can be easily adjusted by adjusting the flow rate of hydrogen and the concentration of hydrogen.

Claims (4)

수소를 사용하여 버블러내에 저장되어 있는 원료를 튜브내에 공급하여 증착한 후 인발하여 광섬유를 제조함을 특징으로 하는 광감쇄기용 광섬유 제조방법.A method for manufacturing an optical fiber for an optical attenuator, characterized in that an optical fiber is produced by supplying a raw material stored in a bubbler using hydrogen into a tube and depositing the same. 제1항에 있어서, 상기 수소는 산화물 원료 공급의 수단으로 사용함을 특징으로 하는 광감쇄기용 광섬유 제조방법.The method of claim 1, wherein the hydrogen is used as a means for supplying an oxide raw material. 제1항 또는 제2항에 있어서, 상기 수소는 공기압 밸브의 열림에 의해 버블러에 공급됨을 특징으로 사는 광감쇄기용 광섬유 제조방법.The optical fiber manufacturing method according to claim 1 or 2, wherein the hydrogen is supplied to the bubbler by opening an air pressure valve. 확산을 이용하여 광섬유 코아내에 광흡수율이 높은 전이금속을 용액으로 도핑하여 광섬유를 제조함을 특징으로 하는 광감쇄기용 광섬유 제조방법.A method of manufacturing an optical fiber for an optical attenuator, wherein the optical fiber is manufactured by doping a transition metal having a high light absorption rate into a solution using a diffusion solution.
KR1019970003135A 1997-01-31 1997-01-31 Optical fiber manufacture method for optical attenuator KR100211727B1 (en)

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