GB1469073A - Optical fibre - Google Patents

Optical fibre

Info

Publication number
GB1469073A
GB1469073A GB3009575A GB3009575A GB1469073A GB 1469073 A GB1469073 A GB 1469073A GB 3009575 A GB3009575 A GB 3009575A GB 3009575 A GB3009575 A GB 3009575A GB 1469073 A GB1469073 A GB 1469073A
Authority
GB
United Kingdom
Prior art keywords
core
tube
diameter
composition
reaction
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.)
Expired
Application number
GB3009575A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3009575A priority Critical patent/GB1469073A/en
Priority to CA256,671A priority patent/CA1061617A/en
Priority to CH906376A priority patent/CH600356A5/xx
Priority to FR7621822A priority patent/FR2318120A1/en
Priority to JP8407776A priority patent/JPS5212846A/en
Publication of GB1469073A publication Critical patent/GB1469073A/en
Priority to US05/948,447 priority patent/US4205901A/en
Expired legal-status Critical Current

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
    • C03B37/012—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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (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

1469073 Optical fibre STANDARD TELEPHONES & CABLES Ltd 17 July 1975 30095/75 Heading C1M An optical fibre made by drawing down a preform comprises a cladding enveloping a core made by a chemical vapour reaction, the core comprising a central region of substantially constant diameter and composition, and terminal regions of increasing diameter and graded composition, the graded composition being such that the core/cladding refractive index difference decreases towards the fibre ends, and being matched with the increasing core diameter so as to provide a normalized frequency within limits which provide the central region and terminal regions with the same single bound non-radiating mode or the same set of bound non-radiating modes. The core material is preferably deposited (by a thermally induced reaction from which hydrogen or its compounds are excluded) in the bore of a tube of lower refractive index cladding glass (the tube is preferably itself formed by vapour reaction on the interior of rotating tube 1 of silica glass). The gas reaction mixture passes through the tube from 4 to 5, the core thickness being varied by varying temperature or flow rate of the gas, and the composition varied by means of the gas composition. The reaction is induced by flame zone 6 which traverses the tube (e.g. to give a temperature of at least 1500‹ C.). The core may have a central diameter of about 3 Á and a terminal diameter of about 30 Á, and the central refractive index difference may be 1% compared with a terminal difference of 0À01%. Reference has been directed by the Comptroller to Specification 1,427,327.
GB3009575A 1975-07-17 1975-07-17 Optical fibre Expired GB1469073A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB3009575A GB1469073A (en) 1975-07-17 1975-07-17 Optical fibre
CA256,671A CA1061617A (en) 1975-07-17 1976-07-09 Limited mode optical fiber
CH906376A CH600356A5 (en) 1975-07-17 1976-07-15
FR7621822A FR2318120A1 (en) 1975-07-17 1976-07-16 FIBER OPTIC WAVEGUID MANUFACTURING METHOD
JP8407776A JPS5212846A (en) 1975-07-17 1976-07-16 Optical glass fiber and method of manufacturing the same
US05/948,447 US4205901A (en) 1975-07-17 1978-10-04 Limited mode optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3009575A GB1469073A (en) 1975-07-17 1975-07-17 Optical fibre

Publications (1)

Publication Number Publication Date
GB1469073A true GB1469073A (en) 1977-03-30

Family

ID=10302205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3009575A Expired GB1469073A (en) 1975-07-17 1975-07-17 Optical fibre

Country Status (5)

Country Link
JP (1) JPS5212846A (en)
CA (1) CA1061617A (en)
CH (1) CH600356A5 (en)
FR (1) FR2318120A1 (en)
GB (1) GB1469073A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823995A (en) * 1972-03-30 1974-07-16 Corning Glass Works Method of forming light focusing fiber waveguide
JPS5522423A (en) * 1978-08-03 1980-02-18 Nippon Baruji Kogyo Kk Operating method of lateral push cylinder in hydraulic bulge forming device

Also Published As

Publication number Publication date
CH600356A5 (en) 1978-06-15
CA1061617A (en) 1979-09-04
JPS5212846A (en) 1977-01-31
FR2318120B1 (en) 1980-04-18
FR2318120A1 (en) 1977-02-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee