JPS577987A - Controlling device for laser beam frequency - Google Patents

Controlling device for laser beam frequency

Info

Publication number
JPS577987A
JPS577987A JP8226080A JP8226080A JPS577987A JP S577987 A JPS577987 A JP S577987A JP 8226080 A JP8226080 A JP 8226080A JP 8226080 A JP8226080 A JP 8226080A JP S577987 A JPS577987 A JP S577987A
Authority
JP
Japan
Prior art keywords
output
intermediary
induced
laser beam
controlling device
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
JP8226080A
Other languages
Japanese (ja)
Other versions
JPS5840356B2 (en
Inventor
Masami Tajima
Tadatami Mori
Takayasu Fukuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP8226080A priority Critical patent/JPS5840356B2/en
Publication of JPS577987A publication Critical patent/JPS577987A/en
Publication of JPS5840356B2 publication Critical patent/JPS5840356B2/en
Expired 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
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/0687—Stabilising the frequency of the laser

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

PURPOSE:To perform the automatic frequency control (AFC) of laser beam precisely and quickly by a method wherein a heterodyne detection is performed on the controlling laser beams, one of a plurality of spectrums is used as an objective substance and said spectrum is passed through the circuit containing a discriminator. CONSTITUTION:The heterodyne detection is performed on the control laser beams and an intermediate frequency signal is induced in filters FL1-FL3 from the input terminal 5 on a controlling device 10 through the intermediary of a distributor 7. The output of the filters FL1 and FL2 is rectified by detectors D1 and D2, and are compared by a comparator 11. On the other hand, the output of the filter FL3 is induced in a detector D3 and a discriminator 15 through the intermediary of distributor 14. The output of the detector D3 is compared with a reference voltage VS by a comparator 12. These outputs are induced in an output terminal 8 through the intermediary of electronic switches SW1 and SW2.
JP8226080A 1980-06-17 1980-06-17 Laser light frequency control device Expired JPS5840356B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8226080A JPS5840356B2 (en) 1980-06-17 1980-06-17 Laser light frequency control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8226080A JPS5840356B2 (en) 1980-06-17 1980-06-17 Laser light frequency control device

Publications (2)

Publication Number Publication Date
JPS577987A true JPS577987A (en) 1982-01-16
JPS5840356B2 JPS5840356B2 (en) 1983-09-05

Family

ID=13769481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8226080A Expired JPS5840356B2 (en) 1980-06-17 1980-06-17 Laser light frequency control device

Country Status (1)

Country Link
JP (1) JPS5840356B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6023180A (en) * 1983-07-19 1985-02-05 住友ベークライト株式会社 Package and manufacture thereof
US5317582A (en) * 1993-04-12 1994-05-31 Hughes Aircraft Company System for detecting modulated laser signals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62297064A (en) * 1986-06-16 1987-12-24 Rodeele Nitta Kk Lamination body for holding wafer such as semiconductor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6023180A (en) * 1983-07-19 1985-02-05 住友ベークライト株式会社 Package and manufacture thereof
US5317582A (en) * 1993-04-12 1994-05-31 Hughes Aircraft Company System for detecting modulated laser signals

Also Published As

Publication number Publication date
JPS5840356B2 (en) 1983-09-05

Similar Documents

Publication Publication Date Title
JPS55157233A (en) Method and apparatus for monitoring etching
JPS575019A (en) Focus controller
JPS57154919A (en) Detecting system for high frequency faulty power level
JPS5542185A (en) Detecting device for arc welding or the like
JPS577987A (en) Controlling device for laser beam frequency
JPS56141036A (en) Engine control device
JPS6319812B2 (en)
GB1496618A (en) Continuously monitoring ratiometer
JPS52117690A (en) Zeeman atomic absorption analysis and apparatus therefor
JPS54114173A (en) Electronic probe device
JPS5783079A (en) Driving method of semiconductor laser
JPS5595384A (en) Semiconductor laser device
SE8403364D0 (en) METHOD AND APPARATUS FOR DEATH-FREE DETECTION OF VEGETABLES
JPS56106478A (en) Automatic focusing device
JPS55112545A (en) Spectroscopic analyzer utilizing magnetorotation
GB8900730D0 (en) An optical filter tuning apparatus and an optical filtering method
JPS57111457A (en) Voltage measuring device using electron beam
JPS5714267A (en) Detector for frequency difference
JPS5487588A (en) Infrared spectral analytical apparatus
JPS55154428A (en) Temperature detector
JPS56163442A (en) Method for detecting gas concentration
JPS5731236A (en) Frequency converting and amplifying circuit
JPS57133371A (en) Sweeping method
JPS5525279A (en) Automatic frequency tuning defeat device
JPS5674208A (en) Automatic focus adjusting device