JPS6439786A - Q-switch laser device - Google Patents

Q-switch laser device

Info

Publication number
JPS6439786A
JPS6439786A JP19537187A JP19537187A JPS6439786A JP S6439786 A JPS6439786 A JP S6439786A JP 19537187 A JP19537187 A JP 19537187A JP 19537187 A JP19537187 A JP 19537187A JP S6439786 A JPS6439786 A JP S6439786A
Authority
JP
Japan
Prior art keywords
laser
output
switch
photodetector
gain
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.)
Pending
Application number
JP19537187A
Other languages
Japanese (ja)
Inventor
Yukio Morishige
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
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 filed Critical NEC Corp
Priority to JP19537187A priority Critical patent/JPS6439786A/en
Publication of JPS6439786A publication Critical patent/JPS6439786A/en
Pending 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
    • H01S3/115—Q-switching using intracavity electro-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
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/136—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Lasers (AREA)

Abstract

PURPOSE:To improve the output stability by a method wherein a photodetector to monitor the laser oscillation level is provided while the initial timing of Q-switch is set up meeting the requirements to specify the gain of a laser resonator. CONSTITUTION:The high-frequency power supplied for a Q-switch element 5 is set up at the level slightly oscillating the laser if it is modulated. When the laser medium in a condenser 6 is excited by an exciting unit 2, the gain in the laser medium is increased. As soon as the gain in the laser medium exceeds the loss in a resonator 12, the laser is slightly oscillated. This laser oscillation is detected by a photodetector 3 to transmit the output from the detector 3 to a comparison circuit 10. The initial timing of the laser oscillation is detected by comparing the judgement level with the output from the photodetector 3 by the comparison circuit 10. In such a constitution, the output wave form of comparison circuit 10 is reformed by a Q-switch trigger circuit 9 to be converted into a Q-switch starting signal.
JP19537187A 1987-08-06 1987-08-06 Q-switch laser device Pending JPS6439786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19537187A JPS6439786A (en) 1987-08-06 1987-08-06 Q-switch laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19537187A JPS6439786A (en) 1987-08-06 1987-08-06 Q-switch laser device

Publications (1)

Publication Number Publication Date
JPS6439786A true JPS6439786A (en) 1989-02-10

Family

ID=16340063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19537187A Pending JPS6439786A (en) 1987-08-06 1987-08-06 Q-switch laser device

Country Status (1)

Country Link
JP (1) JPS6439786A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002208750A (en) * 2000-11-10 2002-07-26 Keyence Corp Laser oscillator and laser pulse control method thereof
JP2002252403A (en) * 2001-02-21 2002-09-06 Keyence Corp Laser oscillator and its laser pulse control method
JP2008235806A (en) * 2007-03-23 2008-10-02 Fujikura Ltd Optical pulse generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002208750A (en) * 2000-11-10 2002-07-26 Keyence Corp Laser oscillator and laser pulse control method thereof
JP2002252403A (en) * 2001-02-21 2002-09-06 Keyence Corp Laser oscillator and its laser pulse control method
JP2008235806A (en) * 2007-03-23 2008-10-02 Fujikura Ltd Optical pulse generator

Similar Documents

Publication Publication Date Title
EP1130710A3 (en) High repetition rate optical pulse generator
EP1478062A3 (en) Self-seeded single-frequency solid-state ring laser, laser peening method and system using same
US4999840A (en) Stabilized synchronously pumped dye laser
WO2003030315A1 (en) Laser control method, laser apparatus, laser treatment method used for the same, laser treatment apparatus
JPS6439786A (en) Q-switch laser device
Poulsen et al. Highly optimized tunable Er/sup 3+/-doped single longitudinal mode fiber ring laser, experiment and model
US4998254A (en) Stabilized synchronously pumped dye laser
ES2007832A6 (en) Power supply for radio-frequency excited gas laser
Kuwashima et al. Chaotic oscillations in single-mode class A laser with long optical delayed feedback
RU2045117C1 (en) Method of active stabilization of frequency of radiation of ring laser
JPH0744039Y2 (en) Diode laser pumped Q-switch oscillation solid-state laser device
JPS5638881A (en) Laser device
JP2986699B2 (en) Q switch control device
JPS57135535A (en) Analog modulation system of semiconductor laser
JPS5555592A (en) Semiconductor light pulse inverter
JPH01192183A (en) Pulse gas laser device
JPS5879788A (en) Driving method for q-switching laser device
JPS57202793A (en) Laser device
JPH0434950Y2 (en)
JPS572130A (en) Starting circuit for oscillating circuit
SU807984A1 (en) Shf pulse source
Gerasimchuk et al. Pulse-periodic rf-excited waveguide CO2 laser with a continuously tunable output frequency
KOEPF Laser apparatus[Patent]
JPS5460698A (en) Pulse operating method of cyclotron
JPS6484682A (en) Laser apparatus