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1. WO1996004580 - OPTICAL ATTENUATOR HAVING A PARTIALLY REFLECTIVE SURFACE

Publication Number WO/1996/004580
Publication Date 15.02.1996
International Application No. PCT/US1995/009297
International Filing Date 18.07.1995
Chapter 2 Demand Filed 20.02.1996
IPC
G02B 6/26 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24Coupling light guides
26Optical coupling means
G02B 6/34 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24Coupling light guides
26Optical coupling means
34utilising prism or grating
G02B 6/38 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24Coupling light guides
36Mechanical coupling means
38having fibre to fibre mating means
CPC
G02B 6/266
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
264with optical elements between opposed fibre ends which perform a function other than beam splitting
266the optical element being an attenuator
G02B 6/29368
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
28having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
293with wavelength selective means
29346operating by wave or beam interference
29361Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
29368Light guide comprising the filter, e.g. filter deposited on a fibre end
G02B 6/3822
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
36Mechanical coupling means
38having fibre to fibre mating means
3807Dismountable connectors, i.e. comprising plugs
381of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
3818of a low-reflection-loss type
3822with beveled fibre ends
G02B 6/3849
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
36Mechanical coupling means
38having fibre to fibre mating means
3807Dismountable connectors, i.e. comprising plugs
3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
3847with means preventing fibre end damage, e.g. recessed fibre surfaces
3849using mechanical protective elements, e.g. caps, hoods, sealing membranes
G02B 6/3854
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
36Mechanical coupling means
38having fibre to fibre mating means
3807Dismountable connectors, i.e. comprising plugs
3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
3854Ferrules characterised by materials
Applicants
  • THE WHITAKER CORPORATION [US/US]; Suite 450 4550 New Linden Hill Road Wilmington, DE 19808, US
Inventors
  • LEWIS, Warren, H.; US
Agents
  • FRANCOS, William, S.; The Whitaker Corporation 4550 New Linden Hill Road Suite 450 Wilmington, DE 19808, US
Priority Data
08/282,92829.07.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL ATTENUATOR HAVING A PARTIALLY REFLECTIVE SURFACE
(FR) ATTENUATEUR OPTIQUE A SURFACE PARTIELLEMENT REFLECHISSANTE
Abstract
(EN)
An optical attenuator (10) uses a partially reflecting layer (30) interposed in the optical path. The layer is inclined relative to the fiber axis so that light traveling along the axis is reflected into the fiber's cladding (40) and does not propagate back down the fiber to the source. In a specific embodiment, an optical attenuator is provided having first and second optical fibers, each of which has a core axis, a cladding substantially concentric with the core axis, and a substantially planar endface at a common fixed angle to the core axis. The optical attenuator (10) also includes a partially reflective coating on the endface of at least one of the optical fibers (16, 18). The partially reflective coating (30) is for reflecting electromagnetic energy transmitted in the direction of the core axes into the cladding (40) of one of the optical fibers. The first and second optical fibers (16, 18) are held in a fixed relationship to each other with their respective endfaces substantially parallel to each other, and their respective core axes substantially collinear.
(FR)
Un atténuateur optique (10) comporte une couche partiellement réfléchissante (30) interposée dans la voie optique. La couche est inclinée par rapport à l'axe de la fibre de sorte que la lumière se déplaçant le long de l'axe soit réfléchie dans le gainage (40) de la fibre et ne se repropage pas de la fibre vers la source. Dans un mode de réalisation spécifique, un atténuateur optique comporte des première et seconde fibres optiques, chacune ayant un axe central, un gainage sensiblement concentrique à l'axe central, et une face terminale sensiblement plane au niveau d'un angle fixe commun par rapport à l'axe central. L'atténuateur optique (10) comporte également un revêtement partiellement réfléchissant sur la face terminale d'au moins une des fibres optiques (16, 18). Le revêtement partiellement réfléchissant (30) est prévu pour réfléchir une énergie électromagnétique transmise en direction des axes centraux dans le gainage (40) d'une des fibres optiques. Les première et seconde fibres optiques (16, 18) sont maintenues dans une relation fixe l'une par rapport à l'autre, leurs faces terminales respectives étant sensiblement parallèles, et leurs axes centraux respectifs sensiblement situés sur la même ligne.
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