JPS57138190A - Laser frequency controller - Google Patents

Laser frequency controller

Info

Publication number
JPS57138190A
JPS57138190A JP56024447A JP2444781A JPS57138190A JP S57138190 A JPS57138190 A JP S57138190A JP 56024447 A JP56024447 A JP 56024447A JP 2444781 A JP2444781 A JP 2444781A JP S57138190 A JPS57138190 A JP S57138190A
Authority
JP
Japan
Prior art keywords
laser
output
circuit
frequency
here
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
JP56024447A
Other languages
Japanese (ja)
Inventor
Hirobumi Kashiwara
Tadatami Mori
Masami Tajima
Yoshio Matsuura
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 JP56024447A priority Critical patent/JPS57138190A/en
Publication of JPS57138190A publication Critical patent/JPS57138190A/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
    • H01S3/1394—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 an active reference, e.g. second laser, klystron or other standard frequency source

Landscapes

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

Abstract

PURPOSE:To obtain pulse laser with stable frequency, by triggering transmission output of transmitting laser to be controlled by local oscilltion laser output of small power. CONSTITUTION:Transmission of a transmitting laser 1 to be controlled is outputted through the first beam splitter BS1. At the same time, output reflected here is applied to the second beam splitter BS2 receiving irradiation from a local oscillation laser 2 which has smaller power than the laser 1 and more stable in frequency by two figures. Next, output synthesized here is applied to a dual distributor 5 via an optical detector 3 and an intermediate frequency amplifier 4. One output divided here in two is applied to an AND circuit 18 via a bandpass filter 8, and amplitude demodulator 9 and a comparator 11. The other is applied to the AND circuit 18 via a discriminator 10 and a comparator 12. The AND output of the circuit 18 is applied to a trigger output stage 20 of the laser 1 connected to the circuit 18 via a frequency controller 15, a high-voltage DC amplifier 16, and a variable frequency device 17.
JP56024447A 1981-02-20 1981-02-20 Laser frequency controller Pending JPS57138190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56024447A JPS57138190A (en) 1981-02-20 1981-02-20 Laser frequency controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56024447A JPS57138190A (en) 1981-02-20 1981-02-20 Laser frequency controller

Publications (1)

Publication Number Publication Date
JPS57138190A true JPS57138190A (en) 1982-08-26

Family

ID=12138400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56024447A Pending JPS57138190A (en) 1981-02-20 1981-02-20 Laser frequency controller

Country Status (1)

Country Link
JP (1) JPS57138190A (en)

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