JPS6489579A - Fiber laser device - Google Patents

Fiber laser device

Info

Publication number
JPS6489579A
JPS6489579A JP24715087A JP24715087A JPS6489579A JP S6489579 A JPS6489579 A JP S6489579A JP 24715087 A JP24715087 A JP 24715087A JP 24715087 A JP24715087 A JP 24715087A JP S6489579 A JPS6489579 A JP S6489579A
Authority
JP
Japan
Prior art keywords
fiber laser
output
fiber
photodetector
laser
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
JP24715087A
Other languages
Japanese (ja)
Inventor
Toshiji Takei
Naoki Kawada
Hironori Yamamoto
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP24715087A priority Critical patent/JPS6489579A/en
Publication of JPS6489579A publication Critical patent/JPS6489579A/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
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • 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
    • H01S3/1312—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 by controlling the optical pumping

Landscapes

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

Abstract

PURPOSE:To stabilize fiber laser without affecting an output operation, by a method wherein part of a fiber laser is retrieved by an optical waveguide coupler to be received by a photodetector and the output variations are fed back to an exciting light source. CONSTITUTION:An optical waveguide coupler is formed by melt-joining or polish-joining a fiber laser 3 with a fiber 4 of the same or different material. A beam from a semiconductor laser 1 is fed to the fiber laser 3 through a collimator lens 2. An output light from the fiber 4 is quite smaller than that from the fiber laser 3 and converged by a condenser lens 5 to reach a photodetector. In a current control circuit 7, a current from the photodetector is converted to a voltage by a current-voltage converter 9 and sent to a power amplifier 11 by a differential amplifier 10 with a voltage kept proportional to a reference voltage driving a semiconductor laser 1 to drive the semiconductor laser. As a result, variations in output from the photodetector 6 apply a negative feedback to the reference voltage to reduce variations in output from the fiber laser 3.
JP24715087A 1987-09-30 1987-09-30 Fiber laser device Pending JPS6489579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24715087A JPS6489579A (en) 1987-09-30 1987-09-30 Fiber laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24715087A JPS6489579A (en) 1987-09-30 1987-09-30 Fiber laser device

Publications (1)

Publication Number Publication Date
JPS6489579A true JPS6489579A (en) 1989-04-04

Family

ID=17159181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24715087A Pending JPS6489579A (en) 1987-09-30 1987-09-30 Fiber laser device

Country Status (1)

Country Link
JP (1) JPS6489579A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06216446A (en) * 1992-10-23 1994-08-05 American Teleph & Telegr Co <Att> Optical wave guide laser device
FR2755771A1 (en) * 1996-11-13 1998-05-15 France Telecom Transverse Fluorescence Controlled Optical Amplifier for Telecommunications

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06216446A (en) * 1992-10-23 1994-08-05 American Teleph & Telegr Co <Att> Optical wave guide laser device
FR2755771A1 (en) * 1996-11-13 1998-05-15 France Telecom Transverse Fluorescence Controlled Optical Amplifier for Telecommunications

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