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JPS5775482A - Q switch laser device - Google Patents

Q switch laser device

Info

Publication number
JPS5775482A
JPS5775482A JP15125180A JP15125180A JPS5775482A JP S5775482 A JPS5775482 A JP S5775482A JP 15125180 A JP15125180 A JP 15125180A JP 15125180 A JP15125180 A JP 15125180A JP S5775482 A JPS5775482 A JP S5775482A
Authority
JP
Japan
Prior art keywords
pulses
signal
peak
switch
modulation
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
JP15125180A
Other languages
Japanese (ja)
Other versions
JPS6317236B2 (en
Inventor
Noriaki Sekiguchi
Reiji Machida
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 JP15125180A priority Critical patent/JPS5775482A/en
Publication of JPS5775482A publication Critical patent/JPS5775482A/en
Publication of JPS6317236B2 publication Critical patent/JPS6317236B2/ja
Granted legal-status Critical Current

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
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
    • H01S3/1123—Q-switching
    • H01S3/117—Q-switching using intracavity acousto-optic devices
    • 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
    • H01S3/1068—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 an acousto-optical device
    • 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
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/1306—Stabilisation of the amplitude

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

PURPOSE:To obtain a switching pulse train having a nearly constant peak-to-peak value by a method wherein the number of modulation pulses of high frequency electric field applied to an acoustic and optical Q switch is gradually increased at the time of generating Q switch pulses and the number of modulation pulses is controlled at a fixed value after several pulses to control the peak-to-peak value of the first pulse. CONSTITUTION:A solid state laser substance 11 is excited by an exciting light source 12 and a condenser 13 and arranged in reflecting mirrors 14, 15 composing a laser resonator. Laser oscillation arranged in the laser resonator goes pulses by an acoustic and optical light modulator 16. The modulator 16 is composed of an ultrasonic cell 17 made of a fused quartz plate and an electroacoustic transducing element 19 forming an ultrasonic phase diffraction grid 18 and a high-frequency signal from a high-frequency device 20 is applied to the element 19. A Q switch control external signal 25 is supplied to a modulation signal generating circuit 23 in the driver 20 and the output from a VHF oscillator 21 is modulated by a modulating circuit 23. And the signal 25 is gradually increased at the time of generating pulses and the pulses are controlled at a fixed value after several pulses to form a pulse train having a nearly constant peak-to-peak value after several pulses to apply the signal 25 to the element 19.
JP15125180A 1980-10-28 1980-10-28 Q switch laser device Granted JPS5775482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15125180A JPS5775482A (en) 1980-10-28 1980-10-28 Q switch laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15125180A JPS5775482A (en) 1980-10-28 1980-10-28 Q switch laser device

Publications (2)

Publication Number Publication Date
JPS5775482A true JPS5775482A (en) 1982-05-12
JPS6317236B2 JPS6317236B2 (en) 1988-04-13

Family

ID=15514568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15125180A Granted JPS5775482A (en) 1980-10-28 1980-10-28 Q switch laser device

Country Status (1)

Country Link
JP (1) JPS5775482A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845719A (en) * 1986-03-28 1989-07-04 Hamamatsu Photonics K.K. Ultrasonic laser modulator
JPH01270370A (en) * 1988-04-22 1989-10-27 Mitsubishi Electric Corp Laser device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH063069B2 (en) * 1987-11-06 1994-01-12 株式会社熊谷組 Weirboard for concrete molding
JPH02277859A (en) * 1989-04-12 1990-11-14 Atago:Kk Lining sheet of framework for concrete

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5287391A (en) * 1976-01-16 1977-07-21 Nec Corp Q switch laser equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5287391A (en) * 1976-01-16 1977-07-21 Nec Corp Q switch laser equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845719A (en) * 1986-03-28 1989-07-04 Hamamatsu Photonics K.K. Ultrasonic laser modulator
JPH01270370A (en) * 1988-04-22 1989-10-27 Mitsubishi Electric Corp Laser device
JP2673303B2 (en) * 1988-04-22 1997-11-05 三菱電機株式会社 Negative branch unstable laser cavity

Also Published As

Publication number Publication date
JPS6317236B2 (en) 1988-04-13

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