HK136396A - An optical filter tuning apparatus and an optical filtering method - Google Patents

An optical filter tuning apparatus and an optical filtering method

Info

Publication number
HK136396A
HK136396A HK136396A HK136396A HK136396A HK 136396 A HK136396 A HK 136396A HK 136396 A HK136396 A HK 136396A HK 136396 A HK136396 A HK 136396A HK 136396 A HK136396 A HK 136396A
Authority
HK
Hong Kong
Prior art keywords
optical
filtering method
tuning apparatus
filter
filter tuning
Prior art date
Application number
HK136396A
Other languages
English (en)
Inventor
Keith Robert Preston
Original Assignee
British Telecomm
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
Application filed by British Telecomm filed Critical British Telecomm
Publication of HK136396A publication Critical patent/HK136396A/xx

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
    • G02B6/34—Optical coupling means utilising prism or grating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Surgical Instruments (AREA)
  • Microscoopes, Condenser (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Glass Compositions (AREA)
  • Prostheses (AREA)
  • Optical Communication System (AREA)
HK136396A 1989-01-13 1996-07-25 An optical filter tuning apparatus and an optical filtering method HK136396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898900730A GB8900730D0 (en) 1989-01-13 1989-01-13 An optical filter tuning apparatus and an optical filtering method

Publications (1)

Publication Number Publication Date
HK136396A true HK136396A (en) 1996-08-02

Family

ID=10649973

Family Applications (1)

Application Number Title Priority Date Filing Date
HK136396A HK136396A (en) 1989-01-13 1996-07-25 An optical filter tuning apparatus and an optical filtering method

Country Status (13)

Country Link
US (1) US5193027A (fr)
EP (1) EP0378442B1 (fr)
JP (1) JP2801394B2 (fr)
KR (1) KR970003765B1 (fr)
AT (1) ATE101925T1 (fr)
AU (1) AU621985B2 (fr)
CA (1) CA2047710C (fr)
DE (1) DE69006748T2 (fr)
ES (1) ES2049412T3 (fr)
GB (1) GB8900730D0 (fr)
HK (1) HK136396A (fr)
IE (1) IE900130L (fr)
WO (1) WO1990008335A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362904B1 (en) * 2000-09-01 2002-03-26 Robert H. Cormack Tunable optical filter with retained complementary output
US6587608B2 (en) 2000-11-14 2003-07-01 Chameleon Optics, Inc. Reconfigurable, all optical add/drop nodes using non-interrupting switching apparatus and methods
WO2002086596A1 (fr) 2001-04-20 2002-10-31 Cormack Robert H Filtres optiques accordables insensibles a la polarisation
US6795654B2 (en) 2001-09-18 2004-09-21 Robert H. Cormack Tunable add/drop filter
US7894692B2 (en) * 2009-05-19 2011-02-22 Ipg Photonics Corporation Method and device for suppressing high-order modes in MM fibers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4569569A (en) * 1982-03-31 1986-02-11 Plessey Overseas Limited Optical coupling devices
US4669811A (en) * 1983-11-17 1987-06-02 Pilkington P.E. Limited Optical filtering apparatus
US4671603A (en) * 1983-11-17 1987-06-09 Pilkington P.E. Limited Optical filters and multiplexing-demultiplexing devices using the same
WO1991013377A1 (fr) * 1990-02-20 1991-09-05 British Telecommunications Public Limited Company Filtres optiques reglables
US5039201A (en) * 1990-04-30 1991-08-13 International Business Machines Corporation Double-pass tunable fabry-perot optical filter

Also Published As

Publication number Publication date
EP0378442B1 (fr) 1994-02-23
US5193027A (en) 1993-03-09
KR910700475A (ko) 1991-03-15
JPH04504176A (ja) 1992-07-23
EP0378442A1 (fr) 1990-07-18
ATE101925T1 (de) 1994-03-15
DE69006748T2 (de) 1994-05-26
CA2047710C (fr) 1997-12-09
CA2047710A1 (fr) 1990-07-14
JP2801394B2 (ja) 1998-09-21
DE69006748D1 (de) 1994-03-31
ES2049412T3 (es) 1994-04-16
AU4969190A (en) 1990-08-13
AU621985B2 (en) 1992-03-26
KR970003765B1 (ko) 1997-03-21
WO1990008335A1 (fr) 1990-07-26
IE900130L (en) 1990-07-13
GB8900730D0 (en) 1989-03-08

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)