WO1994010727A1 - Oscillateur a laser - Google Patents
Oscillateur a laserInfo
- Publication number
- WO1994010727A1 WO1994010727A1 PCT/JP1993/001494 JP9301494W WO9410727A1 WO 1994010727 A1 WO1994010727 A1 WO 1994010727A1 JP 9301494 W JP9301494 W JP 9301494W WO 9410727 A1 WO9410727 A1 WO 9410727A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mirror
- reflecting mirror
- laser
- folded
- resonator
- 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.)
- Ceased
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
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
-
- 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
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
-
- 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
- H01S3/07—Construction or shape of active medium consisting of a plurality of parts, e.g. segments
- H01S3/073—Gas lasers comprising separate discharge sections in one cavity, e.g. hybrid lasers
- H01S3/076—Folded-path lasers
Definitions
- the present invention relates to a laser oscillation device that emits a laser beam from a folded resonator, and more particularly to a laser oscillation device that can easily obtain circularly polarized light. Background technology
- Gas laser oscillators such as C 0 2 gas lasers are widely used for laser processing because of their high efficiency and high output.
- the two molecules are excited by the discharge inside the resonator, and the input power at that time is limited by the proof stress of the members that make up the excitation section and the temperature rise of the gas caused by the excitation. Also, it is necessary to increase the output beam diameter due to the limitation on the light resistance of the output mirror. For this reason, it is necessary to increase the optical path length of the resonator in order to obtain a high output, and the entire device becomes large. As a countermeasure, many laser devices reduce the length of the laser device by folding the optical axis of the resonator in multiple stages.
- FIG. 5 is a diagram schematically showing the configuration of a conventional folded resonator.
- a resonator 20 is composed of an output mirror 1, a rear mirror 2. Exciting sections 3a and 3b, and reflecting mirrors 14a and 14b. All optical axes in resonator 20 are adjusted to lie in the horizontal plane ing. In the resonator 20 having such an optical axis, the polarization direction of the laser beam emitted from the output mirror 1 is 90 ° perpendicular to the horizontal plane as shown by the arrow 21.
- FIG. 6 is a diagram showing a conventional optical system for converting linearly polarized laser light into circularly polarized light.
- the laser light emitted from the resonator 20 is vertical linearly polarized light as shown by an arrow 21.
- a polarizing mirror 5 and a 1Z4 wavelength mirror 6 for linearly polarizing in a 45 ° direction are required.
- the laser light converted into circularly polarized light by the polarization mirror 5 and the 1Z4 wavelength mirror 6 is further changed its direction in the vertical direction by the mirror 7, condensed by the condenser lens 8, and condensed by the work 9. Is irradiated.
- the case where the vertical linearly polarized light is converted into circularly polarized light has been described.
- the polarization mirrors 5 and 1Z4 wavelength mirrors are used to circularly polarize the vertically or horizontally linearly polarized laser light as shown in FIG.
- a mirror 7 that changes the direction of the laser beam vertically downward is also required. That is, three external mirrors are required. For this reason, the cost of the laser oscillation device has been increased accordingly.
- these mirrors unlike the mirrors in the resonator, are often contaminated by dust and the like, and are often disassembled and cleaned. Maintenance is required. Furthermore, at the time of assembly after disassembly, complicated external optical systems had to be adjusted. Disclosure of the invention
- the present invention has been made in view of such a point, and an object of the present invention is to provide a laser oscillation device capable of simplifying an external optical system.
- a laser oscillation device that emits laser light from a folded resonator whose optical axis is folded in multiple stages, it is tilted 45 ° on the horizontal plane and 45 ° on the vertical plane with respect to the optical axis of each excitation unit.
- a laser oscillation device comprising: a third reflecting mirror arranged horizontally; and a folded portion including:
- a component having a reflection angle of 90 ° is reflected by the first reflecting mirror and the second reflecting mirror to the third reflecting mirror, so that the S-polarized component is reflected. Since the first and second reflecting mirrors are tilted by 45 ° on the vertical plane, the S-polarized light component is tilted by 45 ° with respect to the horizontal plane. That is, laser light of linearly polarized light inclined by 45 ° with respect to the horizontal plane is output from the folded resonator.
- FIG. 1 is a diagram showing a configuration of a folded resonator according to the present invention
- Fig. 3 is a view of the reflector from the direction of B in Fig. 1,
- Fig. 4 shows an external optical system for converting linearly polarized laser light into circularly polarized light.
- FIG. 5 is a diagram schematically showing the configuration of a conventional folded resonator
- FIG. 6 is a diagram showing an optical system for converting conventional linearly polarized laser light into circularly polarized light.
- FIG. 1 is a diagram showing a configuration of a folded resonator according to the present invention.
- the folded resonator 10 is composed of an output mirror 1, a rear mirror 2, excitation units 3a and 3b, and reflection mirrors 4a, 4b and 4c.
- the reflecting mirror 4b is arranged horizontally, and is arranged such that the center of the reflecting mirror 4b is located at the vertex of a right-angled isosceles triangle whose base is a line connecting the centers of the reflecting mirrors 4a and 4c. I have.
- Fig. 2 is a view of the reflecting mirrors 4a, 4b and 4c from the direction A in Fig. 1. That is, the reflecting mirrors 4a and 4c are inclined by 45 ° on the vertical plane.
- Fig. 3 is a view of the reflecting mirrors 4a, 4b and 4c viewed from the direction B in Fig. 1.
- the reflecting mirror 4a is inclined by 45 ° in the horizontal plane with respect to the optical axis 3aa of the excitation section 3a.
- the reflecting mirror 4c is inclined by 45 ° in the horizontal plane with respect to the optical axis 3bb of the excitation section 3b. Therefore, the laser light excited by the excitation unit 3b is reflected by the reflecting mirror 4c, and its S-polarized light component is reflected by the reflecting mirror 4b. Then, the P component is reflected by the reflecting mirror 4b to 4a.
- the reflection component of the reflecting mirror 4a becomes an S-polarized component, and the reflecting mirror 4a is 4 5 with respect to the vertical plane. Since the laser beam is inclined, an S-polarized component, that is, a linearly polarized laser beam inclined by 45 ° with respect to the horizontal plane is obtained.
- FIG. 4 is a diagram showing an external optical system for converting linearly polarized laser light into circularly polarized light.
- the laser beam emitted from the folded resonator 10 described above is a laser beam linearly polarized in the direction indicated by the arrow 11, that is, in the direction of 45 °.
- This laser light is circularly polarized by the 1Z4 wavelength mirror 6, converted in a vertically downward direction, condensed by the condenser lens 8, and irradiated to the work 9.
- the folded resonator of the laser oscillation device is configured to generate linearly polarized light inclined at 45 ° with respect to the horizontal plane at the folded portion.
- the laser light becomes linearly polarized light in a direction of 45 ° with respect to the horizontal direction. Therefore, it is only necessary to provide, for example, a 1/4 wavelength mirror as an external optical system for converting the laser light into circularly polarized light, and the configuration of the external optical system can be simplified.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
- Laser Beam Processing (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/244,915 US5412685A (en) | 1992-10-26 | 1993-10-14 | Laser oscillator |
| DE69304512T DE69304512T2 (de) | 1992-10-26 | 1993-10-14 | Laseroszillator |
| KR1019940702231A KR100189599B1 (ko) | 1992-10-26 | 1993-10-14 | 레이저 발진 장치 |
| EP93922648A EP0623979B1 (en) | 1992-10-26 | 1993-10-14 | Laser oscillator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4/287646 | 1992-10-26 | ||
| JP4287646A JPH06140697A (ja) | 1992-10-26 | 1992-10-26 | レーザ発振装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1994010727A1 true WO1994010727A1 (fr) | 1994-05-11 |
Family
ID=17719912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1993/001494 Ceased WO1994010727A1 (fr) | 1992-10-26 | 1993-10-14 | Oscillateur a laser |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5412685A (ja) |
| EP (1) | EP0623979B1 (ja) |
| JP (1) | JPH06140697A (ja) |
| KR (1) | KR100189599B1 (ja) |
| DE (1) | DE69304512T2 (ja) |
| WO (1) | WO1994010727A1 (ja) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07211972A (ja) * | 1994-01-20 | 1995-08-11 | Fanuc Ltd | レーザ発振器 |
| US5878067A (en) * | 1994-08-10 | 1999-03-02 | Fanuc Ltd. | Laser oscillator |
| JPH0856028A (ja) * | 1994-08-10 | 1996-02-27 | Fanuc Ltd | レーザ発振器 |
| US5867519A (en) * | 1996-08-07 | 1999-02-02 | Lumonics Inc. | Multiple element, folded beam laser |
| US5867518A (en) * | 1996-08-07 | 1999-02-02 | Lumonics Inc. | Multiple element laser pumping chamber |
| DE19734308A1 (de) * | 1997-08-08 | 1999-02-18 | Rofin Sinar Laser Gmbh | Gaslaser mit in mehreren Ebenen gefaltetem Strahlengang |
| DE10033071A1 (de) * | 2000-07-07 | 2002-01-17 | Trumpf Lasertechnik Gmbh | Laseranordnung für die Materialbearbeitung |
| CN104242029A (zh) * | 2014-09-29 | 2014-12-24 | 南京中科神光科技有限公司 | 一种激光器折叠谐振腔的快速装调方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62169385A (ja) * | 1986-01-21 | 1987-07-25 | Toshiba Corp | 横流形ガスレ−ザ装置 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3500681A1 (de) * | 1985-01-11 | 1986-07-17 | Hoechst Ag, 6230 Frankfurt | Verfahren zur isolierung und reinigung von lymphokinen |
| JP2514680B2 (ja) * | 1988-01-08 | 1996-07-10 | ファナック株式会社 | レ―ザ発振装置 |
| US5052017A (en) * | 1988-12-01 | 1991-09-24 | Coherent, Inc. | High power laser with focusing mirror sets |
| US5023886A (en) * | 1988-12-01 | 1991-06-11 | Coherent, Inc. | High power laser with focusing mirror sets |
| JP2630011B2 (ja) * | 1990-04-06 | 1997-07-16 | 日本電気株式会社 | ランダム偏光He―Neガスレーザ装置 |
| JP2651263B2 (ja) * | 1990-06-11 | 1997-09-10 | ファナック株式会社 | レーザ発振装置 |
| JP2846521B2 (ja) * | 1992-03-30 | 1999-01-13 | ファナック株式会社 | レーザ発振装置 |
-
1992
- 1992-10-26 JP JP4287646A patent/JPH06140697A/ja active Pending
-
1993
- 1993-10-14 WO PCT/JP1993/001494 patent/WO1994010727A1/ja not_active Ceased
- 1993-10-14 EP EP93922648A patent/EP0623979B1/en not_active Expired - Lifetime
- 1993-10-14 DE DE69304512T patent/DE69304512T2/de not_active Expired - Fee Related
- 1993-10-14 US US08/244,915 patent/US5412685A/en not_active Expired - Lifetime
- 1993-10-14 KR KR1019940702231A patent/KR100189599B1/ko not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62169385A (ja) * | 1986-01-21 | 1987-07-25 | Toshiba Corp | 横流形ガスレ−ザ装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0623979A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100189599B1 (ko) | 1999-06-01 |
| EP0623979A1 (en) | 1994-11-09 |
| JPH06140697A (ja) | 1994-05-20 |
| DE69304512T2 (de) | 1997-01-23 |
| EP0623979B1 (en) | 1996-09-04 |
| EP0623979A4 (en) | 1994-08-18 |
| DE69304512D1 (de) | 1996-10-10 |
| KR940704074A (ko) | 1994-12-12 |
| US5412685A (en) | 1995-05-02 |
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