GB1301553A - - Google Patents

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Publication number
GB1301553A
GB1301553A GB1301553DA GB1301553A GB 1301553 A GB1301553 A GB 1301553A GB 1301553D A GB1301553D A GB 1301553DA GB 1301553 A GB1301553 A GB 1301553A
Authority
GB
United Kingdom
Prior art keywords
region
layer
guides
dimensions
propagation
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
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 filed Critical
Publication of GB1301553A publication Critical patent/GB1301553A/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00Coupling devices of the waveguide type
    • H01P5/12Coupling devices having more than two ports
    • H01P5/16Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/184Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
    • H01P5/185Edge coupled lines
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 for the control of the intensity, phase, polarisation or colour 
    • G02F1/03Devices 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 for the control of the intensity, phase, polarisation or colour  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
    • G02F1/035Devices 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 for the control of the intensity, phase, polarisation or colour  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect in an optical waveguide structure
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/29Devices 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 for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/31Digital deflection, i.e. optical switching
    • G02F1/313Digital deflection, i.e. optical switching in an optical waveguide structure
    • G02F1/3132Digital deflection, i.e. optical switching in an optical waveguide structure of directional coupler type
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00Waveguides; Transmission lines of the waveguide type
    • H01P3/16Dielectric waveguides, i.e. without a longitudinal conductor

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

1301553 Light guides PLESSEY CO Ltd 26 May 1971 [14 July 1970] 34055/70 Heading G2J [Also in Division H4] An electric potential is applied between a strip electrode 5 and an electrically conductive substrate 3 disposed either side of an insulating electro-optic layer 4, Fig.2, whereby a region 6 of layer 4, of dimensions equal to the width and length of electrode 5 and to the thickness of layer 4, is altered in refractive index, the electric potential and consequent refractive index change being such that propagation of an electromagnetic wave within region 6 is restricted to a single mode, or to a restricted set of modes, i.e. region 6 acts as a light guide. Restriction of the propagation mode is effected by reducing the transverse dimensions of the region 6 to below the cut-off dimensions for higher modes. Thus for a wavelength 0.7 Ám, and a refractive index change of + 0.1% in region 6, the height and width of region 6 should be 4 Ám and 8Ám respectively. In the preset construction the two dimensions are controllable in separate steps. The electrode 5 also serves to eliminate modes of polarization parallel to the major surfaces of layer 4. Layers 3 and 4 may be modifications of a single material e.g. layer 4 may be formed by diffusion or epitaxial growth on a semi-conducting substrate of Zn Se or Zn Te, or alternatively they may be dissimilar e.g. KDP contented on tin oxide/glass, or a semi-conductor, and subsequently lapped to a desired thickness. With the latter construction, operation in a single mode may only occur in the plane of the substrate. A delay line or other optical processing device may be interposed between two such waveguide in series. A prism coupler may be used for entering a selected mode in a region 6. A directional coupler may be formed by disposing two such wave-guides close together. As shown in Fig. 3b, the two guides may be formed in a single layer 4. The behaviour is determined by the gap between the guides, the coupling length and the various refractive indices. Therefore by varying the potential applied to electrodes 5, 5, 3, within the limits required for single mode propagation, to modify one or more of the refractive indices in the coupling region, light passed into one guide may be selectively passed out by either guide.
GB1301553D 1970-07-14 1970-07-14 Expired GB1301553A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3405570 1970-07-14

Publications (1)

Publication Number Publication Date
GB1301553A true GB1301553A (en) 1972-12-29

Family

ID=10360809

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1301553D Expired GB1301553A (en) 1970-07-14 1970-07-14

Country Status (1)

Country Link
GB (1) GB1301553A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2434443A1 (en) * 1974-07-17 1976-01-29 Siemens Ag COUPLING DEVICE OF LIGHT WAVES GUIDED IN DIELECTRIC WAVE GUIDES
DE2619327A1 (en) * 1975-04-30 1976-11-11 Thomson Csf ELECTRO-OPTICAL SWITCH
US4198116A (en) * 1975-04-30 1980-04-15 Thomson-Csf Electro-optical switch and modulator
WO1986003891A2 (en) * 1984-12-19 1986-07-03 Martin Marietta Corporation A compound dielectric multi-conductor transmission line and devices constructed therefrom
GB2182158A (en) * 1985-10-02 1987-05-07 Plessey Co Plc Electro-optical waveguide
EP0343771A1 (en) * 1988-03-31 1989-11-29 Junkosha Co. Ltd. Transmission line
WO2004017455A1 (en) * 2002-08-14 2004-02-26 Tokyo Electron Limited Method for manufacturing nonradiative dielectric waveguide and nonradiative dielectric waveguide

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2434443A1 (en) * 1974-07-17 1976-01-29 Siemens Ag COUPLING DEVICE OF LIGHT WAVES GUIDED IN DIELECTRIC WAVE GUIDES
DE2619327A1 (en) * 1975-04-30 1976-11-11 Thomson Csf ELECTRO-OPTICAL SWITCH
US4198116A (en) * 1975-04-30 1980-04-15 Thomson-Csf Electro-optical switch and modulator
WO1986003891A2 (en) * 1984-12-19 1986-07-03 Martin Marietta Corporation A compound dielectric multi-conductor transmission line and devices constructed therefrom
WO1986003891A3 (en) * 1984-12-19 1988-01-14 Martin Marietta Corp A compound dielectric multi-conductor transmission line and devices constructed therefrom
GB2182158A (en) * 1985-10-02 1987-05-07 Plessey Co Plc Electro-optical waveguide
EP0343771A1 (en) * 1988-03-31 1989-11-29 Junkosha Co. Ltd. Transmission line
WO2004017455A1 (en) * 2002-08-14 2004-02-26 Tokyo Electron Limited Method for manufacturing nonradiative dielectric waveguide and nonradiative dielectric waveguide

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees