GB1501265A – Optical fibres
– Google Patents
GB1501265A – Optical fibres
– Google Patents
Optical fibres
Info
Publication number
GB1501265A
GB1501265A
GB1224775A
GB1224775A
GB1501265A
GB 1501265 A
GB1501265 A
GB 1501265A
GB 1224775 A
GB1224775 A
GB 1224775A
GB 1224775 A
GB1224775 A
GB 1224775A
GB 1501265 A
GB1501265 A
GB 1501265A
Authority
GB
United Kingdom
Prior art keywords
filament
ridge
march
helicoidal
light
Prior art date
1974-03-28
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
GB1224775A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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.)
1974-03-28
Filing date
1975-03-24
Publication date
1978-02-15
1975-03-24
Application filed by Western Electric Co Inc
filed
Critical
Western Electric Co Inc
1978-02-15
Publication of GB1501265A
publication
Critical
patent/GB1501265A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
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
C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
C03B37/02745—Fibres having rotational spin around the central longitudinal axis, e.g. alternating +/- spin to reduce polarisation mode dispersion
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
C—CHEMISTRY; METALLURGY
C03—GLASS; MINERAL OR SLAG WOOL
C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B2203/00—Fibre product details, e.g. structure, shape
C03B2203/10—Internal structure or shape details
C—CHEMISTRY; METALLURGY
C03—GLASS; MINERAL OR SLAG WOOL
C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B2203/00—Fibre product details, e.g. structure, shape
C03B2203/10—Internal structure or shape details
C03B2203/12—Non-circular or non-elliptical cross-section, e.g. planar core
C—CHEMISTRY; METALLURGY
C03—GLASS; MINERAL OR SLAG WOOL
C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B2203/00—Fibre product details, e.g. structure, shape
C03B2203/10—Internal structure or shape details
C03B2203/14—Non-solid, i.e. hollow products, e.g. hollow clad or with core-clad interface
C—CHEMISTRY; METALLURGY
C03—GLASS; MINERAL OR SLAG WOOL
C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B2203/00—Fibre product details, e.g. structure, shape
C03B2203/10—Internal structure or shape details
C03B2203/18—Axial perturbations, e.g. in refractive index or composition
C03B2203/20—Axial perturbations, e.g. in refractive index or composition helical
C—CHEMISTRY; METALLURGY
C03—GLASS; MINERAL OR SLAG WOOL
C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B2205/00—Fibre drawing or extruding details
C03B2205/06—Rotating the fibre fibre about its longitudinal axis
Abstract
1501265 Light guides WESTERN ELECTRIC CO Inc 24 March 1975 [28 March 1974] 12247/75 Heading G2J An optical fibre comprises an elongated filament having at least one helicoidal surface ridge surrounding it, the cross-sectional dimensions and the helical period of the ridge being such that the light can be propagated in at least one guided mode therethrough. The ridge and filament are preferably of the same material, e.g. fused silica, and the exposed surfaces of the fibre may be clad with a material of lower refractive index. In one embodiment, see Fig. 4 (not shown) the filament which is unclad, has additionally a pair of helicoidal supporting ridges which are fused to the interior surface of a hollow cylinder serving as a protective casing, and an optically non-linear material may be placed within the cylinder in contact with the light guide ridges over selected lengths.
GB1224775A
1974-03-28
1975-03-24
Optical fibres
Expired
GB1501265A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US45558374A
1974-03-28
1974-03-28
Publications (1)
Publication Number
Publication Date
GB1501265A
true
GB1501265A
(en)
1978-02-15
Family
ID=23809427
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1224775A
Expired
GB1501265A
(en)
1974-03-28
1975-03-24
Optical fibres
Country Status (5)
Country
Link
JP
(1)
JPS50134446A
(en)
CA
(1)
CA1026976A
(en)
DE
(1)
DE2513861A1
(en)
FR
(1)
FR2266180B1
(en)
GB
(1)
GB1501265A
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2445532C2
(en)
*
1974-09-20
1976-09-09
Aeg Telefunken Kabelwerke
Corrugated sheathed fiber light guide
US4227771A
(en)
*
1979-02-21
1980-10-14
Corning Glass Works
Monolithic optical waveguide having a plurality of cores
1974
1974-11-26
CA
CA214,623A
patent/CA1026976A/en
not_active
Expired
1975
1975-03-24
GB
GB1224775A
patent/GB1501265A/en
not_active
Expired
1975-03-27
FR
FR7509681A
patent/FR2266180B1/fr
not_active
Expired
1975-03-27
DE
DE19752513861
patent/DE2513861A1/en
not_active
Withdrawn
1975-03-28
JP
JP50037055A
patent/JPS50134446A/ja
active
Pending
Also Published As
Publication number
Publication date
JPS50134446A
(en)
1975-10-24
FR2266180B1
(en)
1977-11-25
DE2513861A1
(en)
1975-10-02
FR2266180A1
(en)
1975-10-24
CA1026976A
(en)
1978-02-28
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Legal Events
Date
Code
Title
Description
1978-06-28
PS
Patent sealed
1982-10-20
PCNP
Patent ceased through non-payment of renewal fee
