FR2304934A1 - Electrically controlled optical short-circuit device - includes variable reflection electro-optic element such as liquid crystal cell - Google Patents

Electrically controlled optical short-circuit device - includes variable reflection electro-optic element such as liquid crystal cell

Info

Publication number
FR2304934A1
FR2304934A1 FR7508428A FR7508428A FR2304934A1 FR 2304934 A1 FR2304934 A1 FR 2304934A1 FR 7508428 A FR7508428 A FR 7508428A FR 7508428 A FR7508428 A FR 7508428A FR 2304934 A1 FR2304934 A1 FR 2304934A1
Authority
FR
France
Prior art keywords
optic element
electro
liquid crystal
circuit device
crystal cell
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
FR7508428A
Other languages
French (fr)
Other versions
FR2304934B1 (en
Inventor
Luigi D Auria
Guy De Corlieu
Michel Hareng
Serge Le Berre
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7508428A priority Critical patent/FR2304934A1/en
Publication of FR2304934A1 publication Critical patent/FR2304934A1/en
Application granted granted Critical
Publication of FR2304934B1 publication Critical patent/FR2304934B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • 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
    • G02F1/01—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 intensity, phase, polarisation or colour 
    • G02F1/13—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 intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1326—Liquid crystal optical waveguides or liquid crystal cells specially adapted for gating or modulating between optical waveguides
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)

Abstract

The optical short-circuit device is electrically controlled and has application in an optoelectronic repeater. It includes a variable reflection electro-optic element (31) through which the input light beam (2) passes. Depending on the voltage (Vs) applied to this electro-optic element (31), the input beam (2I) is directed into one of two paths (2E or 20I); one path 20I) includes a signal treatment stage (1). The electro-optic element (31) is partially transparent in the presence of the control voltage (Vs) and totally reflecting in the absence of this voltage. It may include a liquid crystal cell having a thin film of nematic material between the two parallel faces of two transparent prisms. These faces have electrodes deposited on them.
FR7508428A 1975-03-18 1975-03-18 Electrically controlled optical short-circuit device - includes variable reflection electro-optic element such as liquid crystal cell Granted FR2304934A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7508428A FR2304934A1 (en) 1975-03-18 1975-03-18 Electrically controlled optical short-circuit device - includes variable reflection electro-optic element such as liquid crystal cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7508428A FR2304934A1 (en) 1975-03-18 1975-03-18 Electrically controlled optical short-circuit device - includes variable reflection electro-optic element such as liquid crystal cell

Publications (2)

Publication Number Publication Date
FR2304934A1 true FR2304934A1 (en) 1976-10-15
FR2304934B1 FR2304934B1 (en) 1978-10-27

Family

ID=9152714

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7508428A Granted FR2304934A1 (en) 1975-03-18 1975-03-18 Electrically controlled optical short-circuit device - includes variable reflection electro-optic element such as liquid crystal cell

Country Status (1)

Country Link
FR (1) FR2304934A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002971A1 (en) * 1977-12-22 1979-07-11 Thomson-Csf Coupling device for an optical transmission line and transmission system comprising such device
EP0080343A1 (en) * 1981-11-19 1983-06-01 Sperry Corporation Optical bypass switch
EP0081177A2 (en) * 1981-12-07 1983-06-15 GTE Laboratories Incorporated Polarization-insensitive optical switch and multiplexing apparatus
FR2538127A1 (en) * 1982-12-21 1984-06-22 Socapex Optical quadripole and multipole comprising such quadripoles
US5764329A (en) * 1996-05-17 1998-06-09 Motorola, Inc. Chiral smectic liquid crystal phase spatial light modulator for unpolarized light in which a reflector is at an angle to the output surface of the liquid crystal cell

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
*REVUE US "APPLIED OPTICS", VOLUME 13, NO 8, AOUT 1974, PAGES 1802-1806, ARTICLE DE G.LUBRUNIE ET AL "NEMATIC LIQUID CRYSTAL DIGITAL LIGHT DEFLECTOR") *
REVUE US "IBM TECHNICAL DISCLOSURE BULLETIN" VOLUME 17 NO 4, SEPTEMBRE 1974, PAGES 1210-1213, ARTICLE DE E.G. LEAN "OPTICAL SWITCH AND MODULATOR IN PARALLEL WAVEGUIDES" *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002971A1 (en) * 1977-12-22 1979-07-11 Thomson-Csf Coupling device for an optical transmission line and transmission system comprising such device
FR2412862A1 (en) * 1977-12-22 1979-07-20 Thomson Csf COUPLING DEVICE TO ONE OPTICAL TRANSMISSION LINE AND TRANSMISSION SYSTEM INCLUDING SUCH DEVICES
EP0080343A1 (en) * 1981-11-19 1983-06-01 Sperry Corporation Optical bypass switch
EP0081177A2 (en) * 1981-12-07 1983-06-15 GTE Laboratories Incorporated Polarization-insensitive optical switch and multiplexing apparatus
EP0081177A3 (en) * 1981-12-07 1984-08-01 Gte Laboratories Incorporated Polarization-insensitive optical switch and multiplexing apparatus
FR2538127A1 (en) * 1982-12-21 1984-06-22 Socapex Optical quadripole and multipole comprising such quadripoles
US5764329A (en) * 1996-05-17 1998-06-09 Motorola, Inc. Chiral smectic liquid crystal phase spatial light modulator for unpolarized light in which a reflector is at an angle to the output surface of the liquid crystal cell

Also Published As

Publication number Publication date
FR2304934B1 (en) 1978-10-27

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Legal Events

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ST Notification of lapse