JPS6413787A - Multistage amplifying laser device - Google Patents

Multistage amplifying laser device

Info

Publication number
JPS6413787A
JPS6413787A JP17068887A JP17068887A JPS6413787A JP S6413787 A JPS6413787 A JP S6413787A JP 17068887 A JP17068887 A JP 17068887A JP 17068887 A JP17068887 A JP 17068887A JP S6413787 A JPS6413787 A JP S6413787A
Authority
JP
Japan
Prior art keywords
laser beams
laser
beams
mirror
central section
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
JP17068887A
Other languages
Japanese (ja)
Inventor
Kimiharu Yasui
Masaaki Tanaka
Shigenori Yagi
Shigeo Eguri
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 JP17068887A priority Critical patent/JPS6413787A/en
Publication of JPS6413787A publication Critical patent/JPS6413787A/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
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2308—Amplifier arrangements, e.g. MOPA
    • 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
    • H01S2301/00—Functional characteristics
    • H01S2301/20—Lasers with a special output beam profile or cross-section, e.g. non-Gaussian
    • H01S2301/203—Lasers with a special output beam profile or cross-section, e.g. non-Gaussian with at least one hole in the intensity distribution, e.g. annular or doughnut mode
    • 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
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08059—Constructional details of the reflector, e.g. shape
    • H01S3/08063—Graded reflectivity, e.g. variable reflectivity mirror
    • 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
    • H01S3/10084—Frequency control by seeding
    • H01S3/10092—Coherent seed, e.g. injection locking

Abstract

PURPOSE:To generate intermediate dense laser beams without damaging oscillation efficiency, and to extract laser beams efficiently from an amplifying stage by providing a laser resonator consisting of a magnifying mirror, at an oscillation stage of which a central section is given partial reflecting properties and a peripheral section nonreflecting properties, and a total reflection convergent mirror. CONSTITUTION:Laser beams 6 magnified and partially reflected by a partial reflecting film 31 at the central section of a magnifying output mirror 3 at a oscillation stage 1 are amplified by a laser medium 5 while being changed into parallel beams 7 by a collimated total reflecting mirror 4. The outer circumferential section of the parallel beams 7 is extracted as laser beams 9 through a non-reflecting film 30 and part of a central section thereof as laser beams 8 through a partial reflecting film 31, and both laser beams are synthesized and introduced to an amplifying stage as laser beams 10. Part of the central section of laser beams 7 is magnified and reflected by the partial reflecting film 31, and reciprocated again in a resonator. Laser beams introduced to the amplifying stage are amplified by a laser medium 50 in the amplifying stage and turned into a large output, and condensed by a lens 12, thus exciting and working a condensing object 13.
JP17068887A 1987-07-07 1987-07-07 Multistage amplifying laser device Pending JPS6413787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17068887A JPS6413787A (en) 1987-07-07 1987-07-07 Multistage amplifying laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17068887A JPS6413787A (en) 1987-07-07 1987-07-07 Multistage amplifying laser device

Publications (1)

Publication Number Publication Date
JPS6413787A true JPS6413787A (en) 1989-01-18

Family

ID=15909549

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17068887A Pending JPS6413787A (en) 1987-07-07 1987-07-07 Multistage amplifying laser device

Country Status (1)

Country Link
JP (1) JPS6413787A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0369183A (en) * 1989-08-08 1991-03-25 Toshiba Corp Laser amplification device
JP2007512708A (en) * 2003-11-26 2007-05-17 ティーシーズィー ゲーエムベーハー Optical system for annealing polysilicon thin film by laser.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0369183A (en) * 1989-08-08 1991-03-25 Toshiba Corp Laser amplification device
JP2007512708A (en) * 2003-11-26 2007-05-17 ティーシーズィー ゲーエムベーハー Optical system for annealing polysilicon thin film by laser.

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