JPS649677A - Stable frequency sweep of frequency variable laser - Google Patents

Stable frequency sweep of frequency variable laser

Info

Publication number
JPS649677A
JPS649677A JP16588587A JP16588587A JPS649677A JP S649677 A JPS649677 A JP S649677A JP 16588587 A JP16588587 A JP 16588587A JP 16588587 A JP16588587 A JP 16588587A JP S649677 A JPS649677 A JP S649677A
Authority
JP
Japan
Prior art keywords
laser
amplifier
frequency
error signal
output
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
JP16588587A
Other languages
Japanese (ja)
Inventor
Shinichiro Okude
Fusakazu Matsushima
Tadao Shimizu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP16588587A priority Critical patent/JPS649677A/en
Publication of JPS649677A publication Critical patent/JPS649677A/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
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/139—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
    • H01S3/1392—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length by using a passive reference, e.g. absorption cell

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To enable stable frequency sweep of a frequency variable laser by a method wherein the light of the laser is detected in a lock-in amplifier after passing through a reference gas cell, the output is compared with a reference voltage to make an error signal and the feedback of the error signal is applied to the laser. CONSTITUTION:Part of a laser beam is sent to a reference gas cell 4 using a beam splitter 3. The laser beam sent out from the cell 4 is condensed in the sensible part of a detector 5. The output of the detector 5 reaches to a lock-in amplifier 6. The absorption spectral line of the reference gas is subjected to phase sensitive detection in a laser modulation frequency. The output L of the amplifier 6 is sent to a differential amplifier 7. A reference voltage generator 8 makes chopping waves R. The amplifier 7 compares the 1 with the R to make an error signal. This error signal is fed back to a diode laser power source 9. Thereby, the frequency of a diode laser 1 can be swept stably.
JP16588587A 1987-07-02 1987-07-02 Stable frequency sweep of frequency variable laser Pending JPS649677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16588587A JPS649677A (en) 1987-07-02 1987-07-02 Stable frequency sweep of frequency variable laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16588587A JPS649677A (en) 1987-07-02 1987-07-02 Stable frequency sweep of frequency variable laser

Publications (1)

Publication Number Publication Date
JPS649677A true JPS649677A (en) 1989-01-12

Family

ID=15820827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16588587A Pending JPS649677A (en) 1987-07-02 1987-07-02 Stable frequency sweep of frequency variable laser

Country Status (1)

Country Link
JP (1) JPS649677A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081616A (en) * 1989-11-21 1992-01-14 Teac Corporation Positioning controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081616A (en) * 1989-11-21 1992-01-14 Teac Corporation Positioning controller

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