GB2257803B - Tunable optical filters - Google Patents

Tunable optical filters

Info

Publication number
GB2257803B
GB2257803B GB9217733A GB9217733A GB2257803B GB 2257803 B GB2257803 B GB 2257803B GB 9217733 A GB9217733 A GB 9217733A GB 9217733 A GB9217733 A GB 9217733A GB 2257803 B GB2257803 B GB 2257803B
Authority
GB
United Kingdom
Prior art keywords
optical filters
tunable optical
tunable
filters
optical
Prior art date
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 - Fee Related
Application number
GB9217733A
Other versions
GB2257803A (en
GB9217733D0 (en
Inventor
Alan Michael Hill
David Brian Payne
Kevin John Blyth
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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.)
Filing date
Publication date
Priority claimed from GB909003768A external-priority patent/GB9003768D0/en
Priority claimed from GB909009306A external-priority patent/GB9009306D0/en
Priority claimed from GB909022126A external-priority patent/GB9022126D0/en
Priority claimed from PCT/GB1991/000264 external-priority patent/WO1991013377A1/en
Application filed by British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to GB9217733A priority Critical patent/GB2257803B/en
Publication of GB9217733D0 publication Critical patent/GB9217733D0/en
Publication of GB2257803A publication Critical patent/GB2257803A/en
Application granted granted Critical
Publication of GB2257803B publication Critical patent/GB2257803B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/2931—Diffractive element operating in reflection
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29313—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide characterised by means for controlling the position or direction of light incident to or leaving the diffractive element, e.g. for varying the wavelength response
GB9217733A 1990-02-20 1992-08-20 Tunable optical filters Expired - Fee Related GB2257803B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9217733A GB2257803B (en) 1990-02-20 1992-08-20 Tunable optical filters

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB909003768A GB9003768D0 (en) 1990-02-20 1990-02-20 Tunable optical filters
GB909009306A GB9009306D0 (en) 1990-04-25 1990-04-25 Tunable optical filters
GB909022126A GB9022126D0 (en) 1990-10-11 1990-10-11 Tunable optical filters
PCT/GB1991/000264 WO1991013377A1 (en) 1990-02-20 1991-02-20 Tunable optical filters
GB9217733A GB2257803B (en) 1990-02-20 1992-08-20 Tunable optical filters

Publications (3)

Publication Number Publication Date
GB9217733D0 GB9217733D0 (en) 1992-10-07
GB2257803A GB2257803A (en) 1993-01-20
GB2257803B true GB2257803B (en) 1993-10-06

Family

ID=27450462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9217733A Expired - Fee Related GB2257803B (en) 1990-02-20 1992-08-20 Tunable optical filters

Country Status (1)

Country Link
GB (1) GB2257803B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123237A1 (en) * 1983-04-23 1984-10-31 Licentia Patent-Verwaltungs-GmbH Optical multiplexer/demultiplexer
WO1987001246A1 (en) * 1985-08-13 1987-02-26 Robert Joseph Mears Fibre-optic lasers and amplifiers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123237A1 (en) * 1983-04-23 1984-10-31 Licentia Patent-Verwaltungs-GmbH Optical multiplexer/demultiplexer
WO1987001246A1 (en) * 1985-08-13 1987-02-26 Robert Joseph Mears Fibre-optic lasers and amplifiers

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Applied Physics Letters,Vol48.NO3,20 JAN 86,Pages 204-206 SEE WHOLE ARTICLE *
Patent Abstract of Japan,Vol 13 no375 p921(3723) 21AUG 1989 JP1129209 22 May 89 See Whole Abstract *
Patent abstract of Japan,Vol5,no201 p94(837)Dec81 JP5612200225 SEPT 81-See Whole Abstract *

Also Published As

Publication number Publication date
GB2257803A (en) 1993-01-20
GB9217733D0 (en) 1992-10-07

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000220