FR2285628A1 - Modulating infra red laser beam for data transmission - using terbium iron garnet and Cotton-Mouton effect - Google Patents

Modulating infra red laser beam for data transmission - using terbium iron garnet and Cotton-Mouton effect

Info

Publication number
FR2285628A1
FR2285628A1 FR7431313A FR7431313A FR2285628A1 FR 2285628 A1 FR2285628 A1 FR 2285628A1 FR 7431313 A FR7431313 A FR 7431313A FR 7431313 A FR7431313 A FR 7431313A FR 2285628 A1 FR2285628 A1 FR 2285628A1
Authority
FR
France
Prior art keywords
cotton
data transmission
laser beam
modulating
pref
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
FR7431313A
Other languages
French (fr)
Other versions
FR2285628B1 (en
Inventor
Tran-Khanh-Vien
Jean-Pierre Jamet
Henri Legall
Ramanathan Krishnan
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7431313A priority Critical patent/FR2285628A1/en
Publication of FR2285628A1 publication Critical patent/FR2285628A1/en
Application granted granted Critical
Publication of FR2285628B1 publication Critical patent/FR2285628B1/fr
Granted 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
    • G02F1/01—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 
    • G02F1/09—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 magneto-optical elements, e.g. exhibiting Faraday effect

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

Process for modulating light, esp. in the infra-red region, the novelty being the use of a monocrystal of a ferromagnetic substance (I) presenting anisotropy due to the Cotton-Mouton effect. Substance (I) pref. exhibits a wide variation in Cotton-Mouton phase displacement as a function of the angle between the static magnetic field and a crystallographic direction in the monocrystal, which is pref. a ferrimagnetic garnet, esp. a terbium-iron garnet. The pref. appts. includes devices producing a polarised, rectilinear beam of light and a detector, substance (I) being located in a static magnetic field perpendicular to the light beam, and a variable magnetic field perpendicular to both the beam and the static field. Modulation of infrared radiation for data transmission at very high frequencies, using a laser beam.
FR7431313A 1974-09-17 1974-09-17 Modulating infra red laser beam for data transmission - using terbium iron garnet and Cotton-Mouton effect Granted FR2285628A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7431313A FR2285628A1 (en) 1974-09-17 1974-09-17 Modulating infra red laser beam for data transmission - using terbium iron garnet and Cotton-Mouton effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7431313A FR2285628A1 (en) 1974-09-17 1974-09-17 Modulating infra red laser beam for data transmission - using terbium iron garnet and Cotton-Mouton effect

Publications (2)

Publication Number Publication Date
FR2285628A1 true FR2285628A1 (en) 1976-04-16
FR2285628B1 FR2285628B1 (en) 1976-12-31

Family

ID=9143139

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7431313A Granted FR2285628A1 (en) 1974-09-17 1974-09-17 Modulating infra red laser beam for data transmission - using terbium iron garnet and Cotton-Mouton effect

Country Status (1)

Country Link
FR (1) FR2285628A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123621A2 (en) * 1983-04-25 1984-10-31 Fujitsu Limited Faraday rotator assembly
US4806885A (en) * 1986-08-08 1989-02-21 Sumitomo Electric Industries, Ltd. Magnet-electro-optic effect light modulator
US11561173B2 (en) 2017-09-29 2023-01-24 Cotton Mouton Diagnostics Limited Magneto-optical method and apparatus for detecting analytes in a liquid

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
*REVUE US "OPTICS AND SPECTROSCOPY", VOLUME 33, NO 3, SEPTEMBRE 1972, PAGES 306 - 309, ARTICLE DE V.D. TRONIKO ET AL "HIGH-FREQUENCY FARADAY LIGHT MODULATORS WITH A TRANSVERSE MAGNETIZING FIELD") *
*REVUE US "SOVIET PHYSICS JETP" VOLUME 30, NO 3, MARS 1970, PAGES 404 - 409, ARTICLE DE R.V. PISAREV ET AL "THE COTTON-MOUTON EFFECTS IN TERBIUM IRON GARNET" *
REVUE US "SOVIET PHYSICS JETP" VOLUME 33, NO 6, DECEMBRE 1971, PAGES 1175-1182, ARTICLE DE R.V. PISAREV ET AL "MAGNETIC BIREFRINGENCE OF LIGHT IN IRON GARNETS" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123621A2 (en) * 1983-04-25 1984-10-31 Fujitsu Limited Faraday rotator assembly
EP0123621A3 (en) * 1983-04-25 1984-12-27 Fujitsu Limited Faraday rotator assembly
US4806885A (en) * 1986-08-08 1989-02-21 Sumitomo Electric Industries, Ltd. Magnet-electro-optic effect light modulator
US11561173B2 (en) 2017-09-29 2023-01-24 Cotton Mouton Diagnostics Limited Magneto-optical method and apparatus for detecting analytes in a liquid

Also Published As

Publication number Publication date
FR2285628B1 (en) 1976-12-31

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