GB1535171A - Optical waveguide coupling arrangements - Google Patents

Optical waveguide coupling arrangements

Info

Publication number
GB1535171A
GB1535171A GB4477574A GB4477574A GB1535171A GB 1535171 A GB1535171 A GB 1535171A GB 4477574 A GB4477574 A GB 4477574A GB 4477574 A GB4477574 A GB 4477574A GB 1535171 A GB1535171 A GB 1535171A
Authority
GB
United Kingdom
Prior art keywords
waveguide
cladding
refractive index
ion exchange
field
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
Application number
GB4477574A
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB4477574A priority Critical patent/GB1535171A/en
Publication of GB1535171A publication Critical patent/GB1535171A/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
    • G02B6/34—Optical coupling means utilising prism or grating
    • 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
    • G02B6/2821—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 using lateral coupling between contiguous fibres to split or combine optical signals
    • 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
    • G02B6/29331—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 evanescent wave coupling
    • G02B6/29332—Wavelength selective couplers, i.e. based on evanescent coupling between light guides, e.g. fused fibre couplers with transverse coupling between fibres having different propagation constant wavelength dependency
    • G02B6/29334—Grating-assisted evanescent light guide couplers, i.e. comprising grating at or functionally associated with the coupling region between the light guides, e.g. with a grating positioned where light fields overlap in the coupler
    • 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
    • G02B6/30—Optical coupling means for use between fibre and thin-film device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

1535171 Coupling light guides NATIONAL RESEARCH DEVELOPMENT CORP 4 Dec 1975 [16 Oct 1974] 44775/74 Heading G2J The refractive index of the cladding 6 of a waveguide 4 is increased over a limited length (e.g. at one end) so that an eranescent field is maintained on the external surface, a second waveguide being positioned and adapted to enable the field to be phase matched to propagation in the second waveguide. The second waveguide may be planar (as in Fig. 2) or circular. To ensure a proper match in phase velocity, a diffraction grating 8 may be needed as shown. The refractive index of the cladding may be raised by an ion exchange method; e.g. if the cladding is a sodium glass the end of the waveguide may be immersed in molten silver nitrate (at 250‹C the R.I. of a 10 Ám cladding increased to 1À6 in 6 hours) The core can be formed of material unaffected by the ion exchange process e.g. a liquid.
GB4477574A 1975-12-04 1975-12-04 Optical waveguide coupling arrangements Expired GB1535171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4477574A GB1535171A (en) 1975-12-04 1975-12-04 Optical waveguide coupling arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4477574A GB1535171A (en) 1975-12-04 1975-12-04 Optical waveguide coupling arrangements

Publications (1)

Publication Number Publication Date
GB1535171A true GB1535171A (en) 1978-12-06

Family

ID=10434689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4477574A Expired GB1535171A (en) 1975-12-04 1975-12-04 Optical waveguide coupling arrangements

Country Status (1)

Country Link
GB (1) GB1535171A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6064783A (en) * 1994-05-25 2000-05-16 Congdon; Philip A. Integrated laser and coupled waveguide
US6236773B1 (en) 1998-12-15 2001-05-22 Texas Instruments Incorporated Single wavelength semiconductor laser with grating-assisted dielectric waveguide coupler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6064783A (en) * 1994-05-25 2000-05-16 Congdon; Philip A. Integrated laser and coupled waveguide
US6487328B2 (en) 1997-12-15 2002-11-26 Texas Instruments Incorporated Single wavelength semiconductor laser with grating-assisted dielectric waveguide coupler
US6236773B1 (en) 1998-12-15 2001-05-22 Texas Instruments Incorporated Single wavelength semiconductor laser with grating-assisted dielectric waveguide coupler

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Legal Events

Date Code Title Description
PS Patent sealed

Free format text: 1525171 SHOULD READ 1535171

732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee