GB1511334A - Electro optical modulator - Google Patents

Electro optical modulator

Info

Publication number
GB1511334A
GB1511334A GB2110575A GB2110575A GB1511334A GB 1511334 A GB1511334 A GB 1511334A GB 2110575 A GB2110575 A GB 2110575A GB 2110575 A GB2110575 A GB 2110575A GB 1511334 A GB1511334 A GB 1511334A
Authority
GB
United Kingdom
Prior art keywords
layer
substate
electric field
diffracted
thin
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
GB2110575A
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Priority to GB2110575A priority Critical patent/GB1511334A/en
Priority to JP5479376A priority patent/JPS51143349A/en
Priority to NL7605268A priority patent/NL7605268A/en
Publication of GB1511334A publication Critical patent/GB1511334A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/29—Devices 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
    • G02F1/31—Digital deflection, i.e. optical switching
    • G02F1/315—Digital deflection, i.e. optical switching based on the use of controlled internal reflection

Abstract

1511334 Controlling light XEROX CORP OF XEROX SQUARE 19 May 1975 21105/75 Heading G2F A thin layer 21 of material with an electric field dependent refractive index is directly supported by a substate 20 and is subjected to a periodic field produced between interdigitated electrodes 22 adjacent one surface thereof to provide a phase diffraction grating for the deflection of a light beam propagating generally parallel to the electrodes 22 and totally internally reflected at the one surface of the layer 21. Variation of the field intensity changes the intensities of the diffracted and undiffracted beams, one of which may be selected by the use of optical stops. Because of the limited penetration of the electric field into layer 21 (effectively half the electrode pitch), the latter may be very thin e.g. 10-20Á, although in practice 50-200Á may be used. It may be vacuum deposited, grown as a crystal, or cemented, in the substrate. In a second embodiment, Fig. 4 (not shown) the incident and diffracted beams enter and leave substate 20 through inclined end-faces. Layer 21 may be of LiNbO 3 ; LiTaO 3 ; KTN; ADP; KDP; KD*P; or Ba 2 NaNb 5 O 15 .
GB2110575A 1975-05-19 1975-05-19 Electro optical modulator Expired GB1511334A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2110575A GB1511334A (en) 1975-05-19 1975-05-19 Electro optical modulator
JP5479376A JPS51143349A (en) 1975-05-19 1976-05-13 Electrooptical modulator
NL7605268A NL7605268A (en) 1975-05-19 1976-05-17 ELECTRO-OPTICAL MODULATOR.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2110575A GB1511334A (en) 1975-05-19 1975-05-19 Electro optical modulator

Publications (1)

Publication Number Publication Date
GB1511334A true GB1511334A (en) 1978-05-17

Family

ID=10157320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2110575A Expired GB1511334A (en) 1975-05-19 1975-05-19 Electro optical modulator

Country Status (3)

Country Link
JP (1) JPS51143349A (en)
GB (1) GB1511334A (en)
NL (1) NL7605268A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062522A1 (en) * 1981-04-02 1982-10-13 Xerox Corporation Proximity-coupled electro-optic devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062522A1 (en) * 1981-04-02 1982-10-13 Xerox Corporation Proximity-coupled electro-optic devices

Also Published As

Publication number Publication date
JPS51143349A (en) 1976-12-09
NL7605268A (en) 1976-07-30

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930519