JPS55111187A - Laser device - Google Patents

Laser device

Info

Publication number
JPS55111187A
JPS55111187A JP1936279A JP1936279A JPS55111187A JP S55111187 A JPS55111187 A JP S55111187A JP 1936279 A JP1936279 A JP 1936279A JP 1936279 A JP1936279 A JP 1936279A JP S55111187 A JPS55111187 A JP S55111187A
Authority
JP
Japan
Prior art keywords
output
oscillation wavelength
laser
amplifier
difference
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
JP1936279A
Other languages
Japanese (ja)
Other versions
JPS637035B2 (en
Inventor
Minoru Akiyoshi
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 JP1936279A priority Critical patent/JPS55111187A/en
Publication of JPS55111187A publication Critical patent/JPS55111187A/en
Publication of JPS637035B2 publication Critical patent/JPS637035B2/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
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/134—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation in gas lasers

Landscapes

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

Abstract

PURPOSE:To allow the output of an amplifier to vary depending on only the intensity of light even if an oscillation wavelength differs, and enable the use of the same graduations of a laser output monitor meter in the total range of the oscillation wavelength. CONSTITUTION:A semiconductor color sensor 4, which receives laser light from a beam splitter 3, comprises two photodiodes different in spectral sensitivity from each other. The output voltages of the photodiodes are logarithmically compressed and the difference between the compressed values is determined in an oscillation wavelength detection circuit 6, the level of whose output is discriminated to detet the oscillation wavelength of laser. Since the logarithmic compression and the determination of the difference are effected, an output corresponding to the wavelength of the incident light can be supplied to a level discrimination circuit. This circuit discriminates voltages of respective wavelengths from one another to shift a switch 8 to change the amplification factor of an amplifier 7 for a solar battery 5.
JP1936279A 1979-02-21 1979-02-21 Laser device Granted JPS55111187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1936279A JPS55111187A (en) 1979-02-21 1979-02-21 Laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1936279A JPS55111187A (en) 1979-02-21 1979-02-21 Laser device

Publications (2)

Publication Number Publication Date
JPS55111187A true JPS55111187A (en) 1980-08-27
JPS637035B2 JPS637035B2 (en) 1988-02-15

Family

ID=11997246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1936279A Granted JPS55111187A (en) 1979-02-21 1979-02-21 Laser device

Country Status (1)

Country Link
JP (1) JPS55111187A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248994A (en) * 1975-10-17 1977-04-19 Hitachi Ltd Method and apparatus for measuring laser light output

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248994A (en) * 1975-10-17 1977-04-19 Hitachi Ltd Method and apparatus for measuring laser light output

Also Published As

Publication number Publication date
JPS637035B2 (en) 1988-02-15

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