JPS6431487A - Method and device for stabilizing oscillation frequency interval of plural lasers - Google Patents

Method and device for stabilizing oscillation frequency interval of plural lasers

Info

Publication number
JPS6431487A
JPS6431487A JP18818787A JP18818787A JPS6431487A JP S6431487 A JPS6431487 A JP S6431487A JP 18818787 A JP18818787 A JP 18818787A JP 18818787 A JP18818787 A JP 18818787A JP S6431487 A JPS6431487 A JP S6431487A
Authority
JP
Japan
Prior art keywords
difference
output
input
lasers
frequency
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
JP18818787A
Other languages
Japanese (ja)
Other versions
JPH0682882B2 (en
Inventor
Naoki Shimozaka
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 JP18818787A priority Critical patent/JPH0682882B2/en
Publication of JPS6431487A publication Critical patent/JPS6431487A/en
Publication of JPH0682882B2 publication Critical patent/JPH0682882B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar

Landscapes

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

Abstract

PURPOSE:To realize simultaneous stabilization of the frequency interval of arbitrary number of lasers by converting the oscillation frequency interval of a plurality of lasers to the time interval and by controlling the error signal, which is obtained by comparing the time interval with a time interval corresponding to the frequency interval standard, to have a definite value. CONSTITUTION:Pulsed electric signal is output from a low-pass filter when the difference between the beam frequency from 1.55mum band phase control region distribution reflection type laser DFB-LD1 and the beam frequency from 1.55mum distribution feedback type lasers DFB-LD 4, 5, 6 is within the range of about 100MHz. The number of pulse is three and is the same as that of the oscillation frequency difference which comes in the range of 100MHz in one cycle of the output signal of a sawtooth generator 2. The output of the third photo detector 21 through the low-pass filter is applied to the third input terminal 33 of a controller 3. In the controller 3, the error signal is the time difference of pulse generation between the input to the first input terminal 31 and the input to the third input terminal 33, and a control signal is output to control the difference to be of a definite value. The control signal from the controller 3 is input to laser driving equipment 22, 23 and 24.
JP18818787A 1987-07-27 1987-07-27 Method and apparatus for stabilizing oscillation frequency intervals of a plurality of laser devices Expired - Lifetime JPH0682882B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18818787A JPH0682882B2 (en) 1987-07-27 1987-07-27 Method and apparatus for stabilizing oscillation frequency intervals of a plurality of laser devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18818787A JPH0682882B2 (en) 1987-07-27 1987-07-27 Method and apparatus for stabilizing oscillation frequency intervals of a plurality of laser devices

Publications (2)

Publication Number Publication Date
JPS6431487A true JPS6431487A (en) 1989-02-01
JPH0682882B2 JPH0682882B2 (en) 1994-10-19

Family

ID=16219291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18818787A Expired - Lifetime JPH0682882B2 (en) 1987-07-27 1987-07-27 Method and apparatus for stabilizing oscillation frequency intervals of a plurality of laser devices

Country Status (1)

Country Link
JP (1) JPH0682882B2 (en)

Also Published As

Publication number Publication date
JPH0682882B2 (en) 1994-10-19

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