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1. (WO1985000585) METHOD OF FABRICATING HIGH BIREFRINGENCE FIBERS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1985/000585 International Application No.: PCT/US1984/001027
Publication Date: 14.02.1985 International Filing Date: 02.07.1984
IPC:
C03B 37/012 (2006.01) ,C03C 13/04 (2006.01) ,G02B 6/10 (2006.01)
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
B
MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
37
Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
01
Manufacture of glass fibres or filaments
012
Manufacture of preforms for drawing fibres or filaments
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
C
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
13
Fibre or filament compositions
04
Fibre optics, e.g. core and clad fibre compositions
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
10
of the optical waveguide type
Applicants: AMERICAN TELEPHONE & TELEGRAPH COMPANY[US/US]; 550 Madison Ave. New York, NY 10022, US
Inventors: PLEIBEL, William; US
SIMPSON, Jay, Richard; US
STOLEN, Rogers, Hall; US
Agent: HIRSCH, A., E., Jr. @; Post Office Box 901 Princeton, NJ 08540, US
Priority Data:
516,00022.07.1983US
Title (EN) METHOD OF FABRICATING HIGH BIREFRINGENCE FIBERS
(FR) PROCEDE DE FABRICATION DE FIBRES A BIREFRINGENCE ELEVEE
Abstract:
(EN) Technique for producing polarization-preserving and single polarization optical fibers. As disclosed, high birefringence is introduced into the preform (20) by deforming the fiber preform (20) such that a cladding layer (24) becomes flat and highly conformable, while the core (22) remains hard and substantially round. In particular, a cladding layer (24) with a relatively low melting point is utilized such that when the preform (20) is heated the cladding becomes liquefied while the core (22) remains solid. The preform (20) may then be deformed so that the cladding layer (24) is substantially flattened. Standard drawing techniques may then be utilized to form polarization-preserving fibers and single polarization fibers from the preform (20).
(FR) Technique de production de fibres optiques préservant la polarisation et à polarisation unique. Une biréfringence élevée est introduite dans la préforme (20) de sorte qu'une couche de revêtement (24) devienne plate et se conforme particulièrement bien, tandis que le noyau (22) reste dur et sensiblement rond. En particulier, une couche de revêtement (24) ayant un point de fusion relativement bas est utilisée de sorte que, lorsque la préforme (20) est chauffée, le revêtement se liquéfie alors que le noyau (22) reste solide. La préforme (20) peut alors se déformer de sorte que la couche de revêtement (24) est sensiblement aplatie. Des techniques d'étirage standard peuvent ensuite être utilisées pour former des fibres préservant la polarisation et des fibres de polarisation unique à partir de la préforme (20).
Designated States: JP
European Patent Office (EPO) (AT, BE, CH, DE, FR, GB, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)