GB2018460A - Directional coupling for optical fibres - Google Patents

Directional coupling for optical fibres

Info

Publication number
GB2018460A
GB2018460A GB7912561A GB7912561A GB2018460A GB 2018460 A GB2018460 A GB 2018460A GB 7912561 A GB7912561 A GB 7912561A GB 7912561 A GB7912561 A GB 7912561A GB 2018460 A GB2018460 A GB 2018460A
Authority
GB
United Kingdom
Prior art keywords
fibre
tap
optical fibres
directional coupling
trunk
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.)
Granted
Application number
GB7912561A
Other versions
GB2018460B (en
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of GB2018460A publication Critical patent/GB2018460A/en
Application granted granted Critical
Publication of GB2018460B publication Critical patent/GB2018460B/en
Expired 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
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • 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
    • G02B6/245—Removing protective coverings of light guides before coupling

Abstract

Low loss directional coupling of optical fibres is obtained by wrapping a tap fibre 13 round a trunk fibre 10. Any cladding is first removed and then the tap fibre wrapped round the trunk fibre. The tap ratio can be varied by a variation in the number of turns or twists of the tap fibre around the trunk fibre. Signals can be abstracted by the tap fibre and also inserted. As shown, 11 is an LED or laser input and 12 and 13 are detectors. <IMAGE>
GB7912561A 1978-04-10 1979-04-10 Directional coupling for optical fibres Expired GB2018460B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA300,734A CA1076858A (en) 1978-04-10 1978-04-10 Low loss directional coupling for optical fibres

Publications (2)

Publication Number Publication Date
GB2018460A true GB2018460A (en) 1979-10-17
GB2018460B GB2018460B (en) 1982-06-23

Family

ID=4111190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7912561A Expired GB2018460B (en) 1978-04-10 1979-04-10 Directional coupling for optical fibres

Country Status (6)

Country Link
JP (2) JPS54145154A (en)
BE (1) BE875316A (en)
CA (1) CA1076858A (en)
DE (1) DE2913794A1 (en)
FR (1) FR2422972A1 (en)
GB (1) GB2018460B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234665A2 (en) * 1986-02-21 1987-09-02 Plessey Overseas Limited Fibre-optic coupler

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830703A (en) * 1981-08-17 1983-02-23 Sumitomo Electric Ind Ltd Fiber having silicone resin clad for optical communication
US4802723A (en) * 1982-09-09 1989-02-07 American Telephone And Telegraph Company, At&T Bell Laboratories Optical fiber tap
DE4030068C2 (en) * 1990-09-22 1994-04-14 Deutsche Aerospace Device for coupling out light

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4843947A (en) * 1971-10-08 1973-06-25
GB1470539A (en) * 1974-06-06 1977-04-14 Standard Telephones Cables Ltd Optical fibre optical power dividers
NL7513127A (en) * 1974-11-11 1976-05-13 Western Electric Co DEVICE FOR TAPING OPTICAL POWER FROM AN INTERMEDIATE SECTION OF A FIBEROPTIC WAVE GUIDE.
DE2456619A1 (en) * 1974-11-29 1976-08-12 Siemens Ag ARRANGEMENT OF BRANCHES ON MESSAGE TRANSMISSION LINES WITH OPTICAL FIBERS
CH607066A5 (en) * 1975-12-05 1978-11-30 Comp Generale Electricite
GB1493660A (en) * 1975-12-16 1977-11-30 Standard Telephones Cables Ltd Optical waveguide power dividers
JPS5283237A (en) * 1975-12-30 1977-07-12 Fujikura Ltd Shunt connection of plastic-cladding optical fibers
US4083625A (en) * 1976-08-02 1978-04-11 Corning Glass Works Optical fiber junction device
DE2922022A1 (en) * 1979-05-30 1980-12-11 Wmf Wuerttemberg Metallwaren COFFEE MACHINE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234665A2 (en) * 1986-02-21 1987-09-02 Plessey Overseas Limited Fibre-optic coupler
GB2191597A (en) * 1986-02-21 1987-12-16 Plessey Co Plc Intertwined monomode fibre-optic coupler
US4775209A (en) * 1986-02-21 1988-10-04 Plessey Overseas Limited Fiber-optic coupler comprising intertwined monomode fibers of different diameter
EP0234665A3 (en) * 1986-02-21 1989-05-24 Plessey Overseas Limited Fibre-optic coupler
GB2191597B (en) * 1986-02-21 1989-11-15 Plessey Co Plc Interwined monomode fibre-optic coupler.

Also Published As

Publication number Publication date
DE2913794C2 (en) 1990-04-26
DE2913794A1 (en) 1979-10-18
JPS54145154A (en) 1979-11-13
FR2422972A1 (en) 1979-11-09
BE875316A (en) 1979-10-04
CA1076858A (en) 1980-05-06
JPS5893911U (en) 1983-06-25
GB2018460B (en) 1982-06-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee