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1. WO2001011403 - SYSTEM AND METHOD FOR ALIGNING OPTICAL FIBER COLLIMATORS

Publication Number WO/2001/011403
Publication Date 15.02.2001
International Application No. PCT/US2000/018800
International Filing Date 10.07.2000
Chapter 2 Demand Filed 16.01.2001
IPC
G02B 6/32 2006.1
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
32having lens focusing means
G02B 6/34 2006.1
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
CPC
G02B 6/2937
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
2937In line lens-filtering-lens devices, i.e. elements arranged along a line and mountable in a cylindrical package for compactness, e.g. 3- port device with GRIN lenses sandwiching a single filter operating at normal incidence in a tubular package
G02B 6/29395
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
29379characterised by the function or use of the complete device
29395configurable, e.g. tunable or reconfigurable
G02B 6/32
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
32having lens focusing means ; positioned between opposed fibre ends
Applicants
  • CORNING INCORPORATED [US]/[US]
Inventors
  • FRANCIS, Kurt, R.
Agents
  • ALDEN, Philip, G.
Priority Data
09/368,68705.08.1999US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEM AND METHOD FOR ALIGNING OPTICAL FIBER COLLIMATORS
(FR) SYSTEME ET PROCEDE PERMETTANT D'ALIGNER DES COLLIMATEURS A FIBRES OPTIQUES
Abstract
(EN) A method and apparatus of aligning a collimator assembly (10) requiring only a single-axis adjustment and for which the collimator (10) may be paired with any other similarly aligned collimator. A collimator typically includes a fiber (12) grasped by a ferrule (14). Both the ferrule (14) and a graded-index (GRIN) lens (20) are eventually bonded to the inside of a glass tube (18) with the fiber/lens distance fixed for optimum collimator performance. According to one method of practicing the invention, the tube/lens assembly (10) is fixed, and the ferrule/fiber (14/12) is slidably inserted into the tube (18). The position of the ferrule/fiber (14/12) is adjusted within the tube (18) while the size of the resultant beam is measured at a fixed distance from the output from the lens (20). If there are two such positions producing the optimum beam size, the position of less separation between the ferrule (14) and fiber (12) is chosen. The collimators (10) aligned by the invention may be freely paired with each other (for example, within a sleeve or housing also containing an optical element located between the two collimators). An optimum beam size and optimum measuring distance may be established by an optical calculation or other optimization technique dictated for the intended use of the collimator (10).
(FR) L'invention concerne un système et un procédé permettant d'aligner un ensemble collimateur (10) ne requérant qu'un seul réglage d'axe et où le collimateur (10) peut être apparié avec n'importe quel autre collimateur aligné de façon semblable. Un collimateur comprend généralement une fibre (12) maintenue par une ferrule (14). La ferrule (14) et une lentille à gradient d'indice (20) (GRIN) sont finalement liées à l'intérieur d'un tube de verre (18), la distance fibre/lentille étant fixée afin d'obtenir un rendement optimal du collimateur. Selon un aspect de l'invention, l'ensemble tube/lentille (10) est fixé et la ferrule/fibre (14/12) est introduite de façon coulissante dans le tube (18). La position de la ferrule/fibre (14/12) est réglée dans le tube (18) tandis que la taille du faisceau obtenu est mesuré à une distance fixe de la sortie de la lentille (20). Si deux de ces positions produisent la taille de faisceau optimale, on choisit la position de moindre séparation entre la ferrule (14) et la fibre (12). Les collimateurs (10) alignés selon l'invention peuvent être librement appariés les uns avec les autres (par exemple, dans un manchon ou une enveloppe contenant également un élément optique situé entre les deux collimateurs). On peut établir une taille de faisceau optimale et une distance de mesure optimale à l'aide d'un calcul optique ou d'une autre technique d'optimisation conçue pour l'utilisation prévue du collimateur (10).
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