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WO2003066541A1 - Articles revetus - Google Patents

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Publication number
WO2003066541A1
WO2003066541A1 PCT/IB2003/000338 IB0300338W WO03066541A1 WO 2003066541 A1 WO2003066541 A1 WO 2003066541A1 IB 0300338 W IB0300338 W IB 0300338W WO 03066541 A1 WO03066541 A1 WO 03066541A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
radiation
optical fibre
reflective
high intensity
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.)
Ceased
Application number
PCT/IB2003/000338
Other languages
English (en)
Inventor
Herman Philip Godfried
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.)
Element Six NV
Original Assignee
Element Six NV
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 Element Six NV filed Critical Element Six NV
Priority to AU2003205946A priority Critical patent/AU2003205946A1/en
Publication of WO2003066541A1 publication Critical patent/WO2003066541A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/001—General methods for coating; Devices therefor
    • C03C17/003—General methods for coating; Devices therefor for hollow ware, e.g. containers
    • C03C17/004—Coating the inside
    • 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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/001—General methods for coating; Devices therefor
    • C03C17/003—General methods for coating; Devices therefor for hollow ware, e.g. containers
    • C03C17/005—Coating the outside
    • 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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • 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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/40—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal all coatings being metal coatings
    • 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
    • C03C25/10—Coating
    • C03C25/104—Coating to obtain optical fibres
    • C03C25/106—Single coatings
    • C03C25/1061—Inorganic coatings
    • 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
    • C03C25/10—Coating
    • C03C25/104—Coating to obtain optical fibres
    • C03C25/106—Single coatings
    • C03C25/1061—Inorganic coatings
    • C03C25/1063—Metals

Definitions

  • This invention relates to coated articles and more particularly, coated high power optical fibres and infrared waveguides.
  • Optical radiation at visible and near-infrared wavelengths may be transported through solid core glass optical fibres.
  • the glass is highly transparent for the radiation, the buffer coating and sometimes the cladding which is provided around the fibre may be easily damaged by any stray radiation incident upon the fibre.
  • Infrared radiation with wavelength longer than approximately 3 ⁇ m cannot be transmitted through ordinary glass fibres, due to absorption by the glass. Fibres consisting of materials such as KRS-5 have been employed. These materials are, however, toxic. Radiation with the highest power or intensity (e.g. as emitted by a CO 2 laser) currently are transmitted through hollow (quartz-) glass fibres coated on the inside surface with a Ag/Agl reflective coating. These fibres are called waveguides. The coating is, however, temperature sensitive and degrades at elevated temperatures. In particular the waveguide is sensitive to IR radiation striking the glass wall, which then, on being absorbed by the glass, heats up the waveguide and thereby degrades or destroys the coating. This type of damage occurs at temperatures where the quartz-glass itself is not affected at all.
  • a coating reflective to high intensity radiation such as visible or IR radiation is provided on an area or areas of an optical fibre or infrared waveguide sensitive to such radiation in use.
  • an optical fibre comprises a solid core of glass fibre having an outer coating susceptible to damage by high intensity radiation, the area or areas of the outer coating exposed to such radiation, in use, being provided with a coating reflective to such radiation.
  • the optical fibre will generally be a quartz-glass fibre.
  • the outer coating will generally comprise a buffer coating or a glass cladding, or a combination thereof.
  • the area or areas provided with the reflective coating will generally be at or around the end of the fibre through which the radiation passes.
  • an infrared waveguide comprises a hollow tube made of a material which heats on absorption of visible or IR radiation, or similar high intensity radiation, the tube having a coating reflective to the radiation on the inner surface and a coating reflective to the radiation on the area or areas of the outer surface which are exposed to such radiation, in use.
  • the coating on the outer surface will be provided on the surface, e.g. the end surface of the tube, which is exposed to incoming radiation, in use.
  • the hollow tube will generally be a quartz-glass tube.
  • the reflective coating on the inner surface of the hollow tube will be bonded to the tube and will typically be a coating comprising layers of Ag and Agl.
  • the coating on the outer surface of the waveguide will also be bonded to the glass tube and is preferably resistant to high temperature, and highly reflective to the radiation.
  • suitable coatings reflective to high intensity radiation are those which have a higher reflectivity at the wavelength of the radiation.
  • coatings of gold, silver, silver iodide, aluminium and copper are suitable. It is preferable that the coating is bonded to the surface or coating to which it is applied. This may be achieved through a layer of a suitable bonding or adhesion promoter. A layer functioning as a diffusion barrier may be provided between the bonding or adhesion layer and the layer which is reflective to the high intensity radiation.
  • An example of a suitable multiple coating is one comprising an inner layer of titanium, an intermediate layer of platinum and an outer layer of gold.
  • the titanium layer is an adhesion promoter.
  • Other materials that can be used to promote bonding to the glass are, for example, Cr and V.
  • the top or outer layer is gold and provides the desired high reflectivity.
  • Other suitable top layer materials are, for example, Ag, Agl, Al or Cu.
  • the Pt layer functions as a diffusion barrier between the Ti and Au layers for providing stability at high temperatures. Other materials such as W and Ni can also be used.
  • the thickness of the outer reflective coating will vary according to the application to which the waveguide or fibre is to be put.
  • the thickness of the Au layer can vary from 0.1 ⁇ m to approximately 5 ⁇ m.
  • Figure 1 is a perspective view of an embodiment of an infrared waveguide of the invention
  • Figure 2 is a perspective view of an embodiment of a solid core glass optical fibre of the invention
  • a waveguide for infrared radiation comprises a hollow tube 10 having a coating bonded to the inner surface 12 and a coating bonded to the outer surface 18 and to the end surface 14 of the end 16 of the tube.
  • the coatings cover the surface 12 completely and the end part of surface 18 close to end 16 and are bonded to these surfaces.
  • the coatings are reflective, and preferably highly reflective, to infrared radiation.
  • the hollow tube is preferably a quartz-glass tube.
  • IR radiation laser light
  • some of the radiation may impinge on the coated surfaces 12, 14 and 18.
  • IR radiation, which exited the tube 10 through the front end 16 may be (partially) reflected from some other surface and impinge on the coated end surfaces 12, 14 and 18.
  • An example of a particularly suitable coating for the inner surface 12 is one comprising a layer of silver to which is bonded a layer of silver iodide.
  • a particularly suitable coating for the outer end surface 14 and the end part of 18 is one comprising a layer of titanium to which is bonded a layer of platinum to which is bonded an outer layer of gold.
  • the thickness of the layers may, for example, be 60/120/1000 nm respectively.
  • the metal layers may be applied by sputter coating. During sputter coating on the surfaces 14 and 18, some of the titanium/platinum/gold may be deposited on the inner surface 12 thus providing extra protection for the glass.
  • the waveguide of the invention has particular application to transmitting laser light to a diamond blade such as that described in International publication WO 01/00100A1.
  • the laser light is introduced into the rear end of such a diamond blade which is partly reflective.
  • part of the light emitted from the waveguide to the diamond blade is reflected back to the waveguide thereby reducing excessive heating in the waveguide.
  • the outer end surface coating described above it was found that the heating effect could be suppressed completely.
  • an optical fibre for transmission of visible and near-infrared radiation comprises a solid glass core 20 having a glass cladding layer 22 around it made of a glass material with an index of refraction that is lower than the index of refraction of the glass material of the core.
  • the optical fibre is further provided with a protective buffer coating 24 typically made out of some plastic material such as polyimide. Radiation enters into and exits from the optical fibre through the end face 26 of the core 20.
  • a coating reflective to visible or IR radiation is applied to the end faces 28 and 30 of the cladding layer 22 and buffer coating 24, respectively, and a part of the outer surface 32 of the buffer coating 24 in the region of the end face 30.
  • These reflective coatings are bonded to the surfaces to which they are applied and are reflective, and preferably highly reflective, to the visible or near-infrared radiation incident upon them.

Landscapes

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

Abstract

fibre optique ou guide d'onde infrarouge possédant une ou plusieurs zones sensibles à un rayonnement extrêmement intense. Cette zone ou ces zones sont pourvues d'un revêtement réfléchissant le rayonnement haute intensité.
PCT/IB2003/000338 2002-02-05 2003-02-03 Articles revetus Ceased WO2003066541A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003205946A AU2003205946A1 (en) 2002-02-05 2003-02-03 Coated articles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2002/0998 2002-02-05
ZA200200998 2002-02-05

Publications (1)

Publication Number Publication Date
WO2003066541A1 true WO2003066541A1 (fr) 2003-08-14

Family

ID=27735407

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/000338 Ceased WO2003066541A1 (fr) 2002-02-05 2003-02-03 Articles revetus

Country Status (2)

Country Link
AU (1) AU2003205946A1 (fr)
WO (1) WO2003066541A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056262A1 (fr) * 1981-01-12 1982-07-21 Sumitomo Electric Industries Limited Procédé de fabrication d'une fibre de guide d'ondes infrarouges
JPS60405A (ja) * 1983-06-17 1985-01-05 Agency Of Ind Science & Technol Ｇｉ型イオン結晶光フアイバとその製造方法
JPS6242106A (ja) * 1986-08-04 1987-02-24 Fujikura Ltd 保護膜を有する赤外線伝送用光フアイバの製造方法
EP0237907A1 (fr) * 1986-03-15 1987-09-23 Sumitomo Electric Industries Limited Fibre optique cristalline et son procédé de fabrication
WO2001000100A1 (fr) 1999-06-29 2001-01-04 Drukker International Bv Lame coupante pour instrument chirurgical

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056262A1 (fr) * 1981-01-12 1982-07-21 Sumitomo Electric Industries Limited Procédé de fabrication d'une fibre de guide d'ondes infrarouges
JPS60405A (ja) * 1983-06-17 1985-01-05 Agency Of Ind Science & Technol Ｇｉ型イオン結晶光フアイバとその製造方法
EP0237907A1 (fr) * 1986-03-15 1987-09-23 Sumitomo Electric Industries Limited Fibre optique cristalline et son procédé de fabrication
JPS6242106A (ja) * 1986-08-04 1987-02-24 Fujikura Ltd 保護膜を有する赤外線伝送用光フアイバの製造方法
WO2001000100A1 (fr) 1999-06-29 2001-01-04 Drukker International Bv Lame coupante pour instrument chirurgical

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198507, Derwent World Patents Index; Class L01, AN 1985-041306, XP002244373 *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 226 (P - 598) 23 July 1987 (1987-07-23) *

Also Published As

Publication number Publication date
AU2003205946A1 (en) 2003-09-02

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