JPS5772392A - Coupler for semiconductor laser and optical fiber - Google Patents

Coupler for semiconductor laser and optical fiber

Info

Publication number
JPS5772392A
JPS5772392A JP55149583A JP14958380A JPS5772392A JP S5772392 A JPS5772392 A JP S5772392A JP 55149583 A JP55149583 A JP 55149583A JP 14958380 A JP14958380 A JP 14958380A JP S5772392 A JPS5772392 A JP S5772392A
Authority
JP
Japan
Prior art keywords
optical fiber
speckle
ultrasonic
laser
phase
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
JP55149583A
Other languages
Japanese (ja)
Inventor
Teruhito Matsui
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55149583A priority Critical patent/JPS5772392A/en
Publication of JPS5772392A publication Critical patent/JPS5772392A/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
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0225—Out-coupling of light
    • H01S5/02251—Out-coupling of light using optical fibres

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To prevent speckle noises effectively by phase-modulating semiconductor layer rays through ultrasonic waves. CONSTITUTION:Laser rays generated from the semiconductor laser 1 are focussed by means of a lens 2, phase-modulated through ultrasonic waves at an ultrasonic transmitter 4 and projected to the optical fiber 5. Ultrasonic vibration is generated at a piezo-electric element 3, and transmitted to the ultrasonic transmitter 4. Consequently, since the incident conditions of the phase, etc. of the laser rays at an incident surface of the optical fiber 5 are changed periodically in accordance with a period of the ultrasonic vibration, interference conditions in the optical fiber 5 alter, and a position and a form of a speckle change. Accordingly, the speckle in the optical fiber 5 is smoothed and the speckle noises can be reduced by generating ultrasonic waves at frequency higher than the frequency of modulation signals applied to the semmiconductor laser 1.
JP55149583A 1980-10-24 1980-10-24 Coupler for semiconductor laser and optical fiber Pending JPS5772392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55149583A JPS5772392A (en) 1980-10-24 1980-10-24 Coupler for semiconductor laser and optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149583A JPS5772392A (en) 1980-10-24 1980-10-24 Coupler for semiconductor laser and optical fiber

Publications (1)

Publication Number Publication Date
JPS5772392A true JPS5772392A (en) 1982-05-06

Family

ID=15478365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149583A Pending JPS5772392A (en) 1980-10-24 1980-10-24 Coupler for semiconductor laser and optical fiber

Country Status (1)

Country Link
JP (1) JPS5772392A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63133109A (en) * 1986-11-26 1988-06-04 Anritsu Corp Light source device
EP0385706A2 (en) * 1989-02-27 1990-09-05 Texas Instruments Incorporated Apparatus and method for digitized video system
US5272473A (en) * 1989-02-27 1993-12-21 Texas Instruments Incorporated Reduced-speckle display system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63133109A (en) * 1986-11-26 1988-06-04 Anritsu Corp Light source device
JPH0575087B2 (en) * 1986-11-26 1993-10-19 Anritsu Corp
EP0385706A2 (en) * 1989-02-27 1990-09-05 Texas Instruments Incorporated Apparatus and method for digitized video system
US5272473A (en) * 1989-02-27 1993-12-21 Texas Instruments Incorporated Reduced-speckle display system

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