IT1176571B - Dispositivo emettitore di luce e impianto di trattamento di segnali ottici impiegante il medesimo - Google Patents

Dispositivo emettitore di luce e impianto di trattamento di segnali ottici impiegante il medesimo

Info

Publication number
IT1176571B
IT1176571B IT22244/84A IT2224484A IT1176571B IT 1176571 B IT1176571 B IT 1176571B IT 22244/84 A IT22244/84 A IT 22244/84A IT 2224484 A IT2224484 A IT 2224484A IT 1176571 B IT1176571 B IT 1176571B
Authority
IT
Italy
Prior art keywords
same
optical signal
light emitter
treatment plant
signal treatment
Prior art date
Application number
IT22244/84A
Other languages
English (en)
Other versions
IT8422244A0 (it
Inventor
Takahashi Takeo
Chinone Naoki
Urita Kazuki
Ohishi Akio
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of IT8422244A0 publication Critical patent/IT8422244A0/it
Application granted granted Critical
Publication of IT1176571B publication Critical patent/IT1176571B/it

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
    • H01S5/06216—Pulse modulation or generation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/065—Mode locking; Mode suppression; Mode selection ; Self pulsating
    • H01S5/0651—Mode control
    • H01S5/0652—Coherence lowering or collapse, e.g. multimode emission by additional input or modulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/065—Mode locking; Mode suppression; Mode selection ; Self pulsating
    • H01S5/0658—Self-pulsating

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)
IT22244/84A 1983-08-08 1984-08-07 Dispositivo emettitore di luce e impianto di trattamento di segnali ottici impiegante il medesimo IT1176571B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58143879A JPS6035344A (ja) 1983-08-08 1983-08-08 発光装置およびこれを用いた光学的信号処理装置

Publications (2)

Publication Number Publication Date
IT8422244A0 IT8422244A0 (it) 1984-08-07
IT1176571B true IT1176571B (it) 1987-08-18

Family

ID=15349136

Family Applications (1)

Application Number Title Priority Date Filing Date
IT22244/84A IT1176571B (it) 1983-08-08 1984-08-07 Dispositivo emettitore di luce e impianto di trattamento di segnali ottici impiegante il medesimo

Country Status (6)

Country Link
JP (1) JPS6035344A (it)
KR (1) KR850002707A (it)
DE (1) DE3429255A1 (it)
FR (1) FR2550645A1 (it)
GB (1) GB2144912B (it)
IT (1) IT1176571B (it)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS623534A (ja) * 1985-06-28 1987-01-09 Sharp Corp 光変調装置
JPS62150732U (it) * 1986-03-17 1987-09-24
US4799069A (en) * 1986-04-18 1989-01-17 Minolta Camera Kabushiki Kaisha Laser recording apparatus
JPS6310333A (ja) * 1986-06-30 1988-01-16 Pioneer Electronic Corp 光学式情報読取装置
JPH0746437B2 (ja) * 1986-07-21 1995-05-17 株式会社日立製作所 光ヘツド
EP0279404B1 (de) * 1987-02-20 1992-05-06 Siemens Aktiengesellschaft Lasersenderanordnung
JPH0691296B2 (ja) * 1987-03-31 1994-11-14 三菱電機株式会社 半導体レ−ザの組立方法
JPS6464139A (en) * 1987-09-04 1989-03-10 Hitachi Ltd Thin film optical pickup
DE3814583C1 (it) * 1988-04-27 1989-11-23 Krone Ag, 1000 Berlin, De
JPH0724112B2 (ja) * 1988-12-19 1995-03-15 ローム株式会社 レーザダイオードユニットの取り付け方法
US5233580A (en) * 1988-12-19 1993-08-03 Rohm Co., Ltd. Laser diode unit welded to a mounting member by laser light
JPH04186535A (ja) * 1990-11-20 1992-07-03 Mitsubishi Electric Corp 光学的情報再生装置
DE4127859A1 (de) * 1991-08-22 1993-07-08 Teldix Gmbh Einrichtung zur messung der drehgeschwindigkeit
US5455704A (en) * 1991-11-08 1995-10-03 Mitsubishi Denki Kabushiki Kaisha Optical-fiber light amplifier
EP0541061B1 (en) * 1991-11-08 1997-07-02 Mitsubishi Denki Kabushiki Kaisha Optical-fiber light amplifier
JPH06349098A (ja) * 1993-06-07 1994-12-22 Canon Inc 光学的情報記録再生装置
JP3247919B2 (ja) * 1993-07-19 2002-01-21 三菱電機株式会社 光増幅装置
JP3780650B2 (ja) * 1997-08-05 2006-05-31 ソニー株式会社 半導体レーザの平均光出力の設定方法および半導体レーザの高周波電流の重畳条件の設定方法
US6151290A (en) * 1998-02-05 2000-11-21 Sony Corporation Inexpensive safe light beam recorder
WO2000048179A1 (en) * 1999-02-11 2000-08-17 Sony Electronics, Inc. Inexpensive safe light beam recorder
JP4376013B2 (ja) 2002-11-11 2009-12-02 シャープ株式会社 半導体レーザ装置
JP5234238B2 (ja) 2006-02-22 2013-07-10 日亜化学工業株式会社 光ディスク装置
JP2009104753A (ja) * 2007-10-25 2009-05-14 Toshiba Corp 光ヘッド装置およびそれを用いた情報記録再生装置
US8750341B2 (en) * 2008-01-04 2014-06-10 Mindspeed Technologies, Inc. Method and apparatus for reducing optical signal speckle
GB2468716A (en) 2009-03-20 2010-09-22 Univ Dublin City An optical wavelength comb generator device
US20120044279A1 (en) * 2009-04-27 2012-02-23 Hiroshi Uchino Image Projection Apparatus and Laser Beam Projection Apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641459A (en) * 1969-06-16 1972-02-08 Bell Telephone Labor Inc Apparatus and method for narrowing the pulse width and stabilizing the repetition rate in semiconductor lasers exhibiting self-induced pulsing
US3723903A (en) * 1971-05-13 1973-03-27 Bell Telephone Labor Inc Dynamic fm control of the transverse modes of a self-pulsing semiconductor laser
NL7312139A (it) * 1972-09-08 1974-03-12
DE2330310A1 (de) * 1973-06-14 1975-01-16 Siemens Ag Verfahren zur pulsmodulation von halbleiterlasern
US4079339A (en) * 1975-05-17 1978-03-14 Nippon Electric Company, Ltd. Light self-injecting semiconductor laser device
DE2534889C2 (de) * 1975-08-05 1981-09-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur Verstärkung der Modulationstiefe des optischen Ausgangssignals bzw. des durch Einkopplung eines optischen Signals erzeugten elektrischen Ausgangssignals eines Halbleiterinjektionslasers sowie Anordnung zur Durchführung des Verfahrens
NL8004159A (nl) * 1979-08-03 1981-01-22 Hitachi Ltd Optische opneeminrichting.
JPS5647933A (en) * 1979-09-25 1981-04-30 Sony Corp Optical signal head
US4317236A (en) * 1980-02-25 1982-02-23 Bell Telephone Laboratories, Incorporated Laser digital transmitter
JPS57200912A (en) * 1981-06-04 1982-12-09 Pioneer Electronic Corp Information recording system

Also Published As

Publication number Publication date
GB2144912B (en) 1987-12-31
IT8422244A0 (it) 1984-08-07
FR2550645A1 (fr) 1985-02-15
JPS6035344A (ja) 1985-02-23
DE3429255A1 (de) 1985-02-28
KR850002707A (ko) 1985-05-15
GB8420060D0 (en) 1984-09-12
GB2144912A (en) 1985-03-13

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