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1. WO1999030190 - OPTICAL CIRCULATOR

Publication Number WO/1999/030190
Publication Date 17.06.1999
International Application No. PCT/US1998/024575
International Filing Date 17.11.1998
Chapter 2 Demand Filed 18.06.1999
IPC
G02B 5/30 2006.1
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
G02B 6/26 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
G02F 1/09 2006.1
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour
09based on magneto-optical elements, e.g. exhibiting Faraday effect
G02F 1/31 2006.1
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
29for the control of the position or the direction of light beams, i.e. deflection
31Digital deflection devices
CPC
G02B 5/3083
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
3083Birefringent or phase retarding elements
G02B 6/2746
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
24Coupling light guides
26Optical coupling means
27with polarisation selective and adjusting means
2746comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
G02F 1/093
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour 
09based on magneto-optical elements, e.g. exhibiting Faraday effect
093used as non-reciprocal devices, e.g. optical isolators, circulators
G02F 1/31
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
29for the control of the position or the direction of light beams, i.e. deflection
31Digital deflection, ; i.e. optical switching
Applicants
  • U.S.A. KAIFA TECHNOLOGY, INC. [US]/[US]
Inventors
  • LI, Wei-Zhong
  • AU-YEUNG, Vincent
  • GUO, Qingdong
Agents
  • ALBOSZTA, Marek
Priority Data
08/986,06408.12.1997US
09/025,52618.02.1998US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL CIRCULATOR
(FR) CIRCULATEUR OPTIQUE
Abstract
(EN) An improved optical circulator transfers light from a first optical port to a second optical port, and from the second port to a third port. The circulator has reciprocal polarization rotators (16-A, -B; 18-A, -B) and non-reciprocal polarization rotators (20-A, -B), birefringent beam splitters and combiners (14-A, -B), and a birefringent walk-off element (26) as well as a polarization-dependent light bending device comprising two tapered birefringent plates (22, 24). The light bending device compensates for an angle between a first light beam emanating from the first port and a second light beam propagating to the third port. The existence of this angle allows the first and third fibers to be coupled to the light beams using a single lens.
(FR) Circulateur optique amélioré qui transfère la lumière d'une première voie optique vers une deuxième voie optique, et de la deuxième voie optique vers une troisième voie optique. Ledit circulateur possède des rotateurs (16-A, -B; 18-A, -B) de polarisation réciproque et des rotateurs (20-A, -B) de polarisation non réciproque, des diviseurs de faisceaux et des combinateurs (14-A, -B) biréfringents, et un élément de décrochage (26) biréfringent ainsi qu'un dispositif de coudage de la lumière dépendant de la polarisation comportant deux plaques (22, 24) biréfringentes effilées. Le dispositif de coudage de lumière compense un angle entre un premier faisceau de lumière émanant de la première voie et un deuxième faisceau de lumière se propageant vers la troisième voie. L'existence de cet angle permet le couplage des première et troisième fibres aux faisceaux lumineux à l'aide d'une seule lentille.
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