JPS57146221A - Optical modulation system - Google Patents

Optical modulation system

Info

Publication number
JPS57146221A
JPS57146221A JP3170381A JP3170381A JPS57146221A JP S57146221 A JPS57146221 A JP S57146221A JP 3170381 A JP3170381 A JP 3170381A JP 3170381 A JP3170381 A JP 3170381A JP S57146221 A JPS57146221 A JP S57146221A
Authority
JP
Japan
Prior art keywords
electrodes
light
electrode
comb
optical output
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
JP3170381A
Other languages
Japanese (ja)
Other versions
JPH0324649B2 (en
Inventor
Mitsukazu Kondo
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3170381A priority Critical patent/JPS57146221A/en
Publication of JPS57146221A publication Critical patent/JPS57146221A/en
Publication of JPH0324649B2 publication Critical patent/JPH0324649B2/ja
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 
    • G02F1/03—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
    • G02F1/0327—Operation of the cell; Circuit arrangements

Landscapes

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

Abstract

PURPOSE:To hold a stationary optical output which is free of variation in the quantity of light for a long time by arranging electrodes which have equal periods in a light transmission direction on crystal which has prescribed electrooptical effect, and applying out-of-phase AC voltages, etc., to respective electrodes. CONSTITUTION:On X-plate LiTaO3 crystal 1 formed so that light is transmitted in the direction of an Y axis, an interdigital electrode consists of comb-shaped electrodes 2 and 3 cascaded at a period A in the Y-axis direction, and a comb- shaped electrode 4 intertwined with them. When a voltage is applied between the comb-shaped electrodes 4 and 2, or 3 in an optical modulator, electric fields in directions +X and -X are established alternately in the direction Y at the period A, and incident light 7 becomes emitted light 9. A rectangular wave voltage is applied to the electrode 2, and a rectangular wave voltage having the same amplitude and pi out of phase with said voltage is applied to the electrode 3. Therefore, the voltages are applied to the electrodes 2 and 3 alternately to equalize conversion efficiency at points t1, t2 and t3 of time, thus obtaining a constant optical output. Consequently, the stationary optical output is held for a long period.
JP3170381A 1981-03-05 1981-03-05 Optical modulation system Granted JPS57146221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3170381A JPS57146221A (en) 1981-03-05 1981-03-05 Optical modulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3170381A JPS57146221A (en) 1981-03-05 1981-03-05 Optical modulation system

Publications (2)

Publication Number Publication Date
JPS57146221A true JPS57146221A (en) 1982-09-09
JPH0324649B2 JPH0324649B2 (en) 1991-04-03

Family

ID=12338420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3170381A Granted JPS57146221A (en) 1981-03-05 1981-03-05 Optical modulation system

Country Status (1)

Country Link
JP (1) JPS57146221A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006163271A (en) * 2004-12-10 2006-06-22 Fujitsu Ltd Optical device, and driving voltage supply device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158951A (en) * 1978-06-05 1979-12-15 Nec Corp Light wavelength separating modulator and light wavelength multiple signal transmitter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158951A (en) * 1978-06-05 1979-12-15 Nec Corp Light wavelength separating modulator and light wavelength multiple signal transmitter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006163271A (en) * 2004-12-10 2006-06-22 Fujitsu Ltd Optical device, and driving voltage supply device
JP4542422B2 (en) * 2004-12-10 2010-09-15 富士通株式会社 Optical device and drive voltage supply apparatus

Also Published As

Publication number Publication date
JPH0324649B2 (en) 1991-04-03

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