DE102006050155A1 - Optical arrangement e.g. gas laser, for forming laser beam, has unit from wave plate, where beam, which can be formed, is divided into two partial beams of different polarizations by unit from wave plate - Google Patents
Optical arrangement e.g. gas laser, for forming laser beam, has unit from wave plate, where beam, which can be formed, is divided into two partial beams of different polarizations by unit from wave plate Download PDFInfo
- Publication number
- DE102006050155A1 DE102006050155A1 DE200610050155 DE102006050155A DE102006050155A1 DE 102006050155 A1 DE102006050155 A1 DE 102006050155A1 DE 200610050155 DE200610050155 DE 200610050155 DE 102006050155 A DE102006050155 A DE 102006050155A DE 102006050155 A1 DE102006050155 A1 DE 102006050155A1
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- optical arrangement
- shaping
- beams
- rays
- partial
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0972—Prisms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
- G02B27/126—The splitting element being a prism or prismatic array, including systems based on total internal reflection
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
In dieser Patentanmeldung werden optische Anordnungen zur Formung von Strahlen angegeben, bei denen mindestens eine Verzögerungsplatte zur Aufteilung des Strahls mit unterschiedlichen Polarisationen verwendet wird. Die Teilstrahlen unterschiedlicher Polarisationen werden räumlich überlagert.In this patent application, optical arrangements for shaping beams are given in which at least one retarder plate is used for splitting the beam with different polarizations. The partial beams of different polarizations are spatially superimposed.
Description
Stand der TechnikState of the art
Laser gewinnen immer mehr Bedeutung in Materialbearbeitung. Es gibt verschiedene Laser, z. B. Gaslaser, Halbleiterlaser, Faserlaser, Festkörperlaser und Excimer Laser. In meisten Fällen haben die Laser rotationssymmetrische Verstärkungsvolumen, so dass die meisten Laserstrahlen einen runden Strahlquerschnitt aufweisen. Für flächige Bearbeitung, wie Abtragen und Markierung ist aufgrund des runden Strahlquerschnitts ineffektiv für Flächenfüllung. Um flächige Bearbeitung zu ermöglich ist oft hohe prozentige Überlappung der Bearbeitungszonen erforderlich.laser gain more and more importance in material processing. There are different Laser, z. As gas lasers, semiconductor lasers, fiber lasers, solid state lasers and excimer lasers. In most cases the lasers have rotationally symmetric gain volume, so that the Most laser beams have a round beam cross section. For surface processing, how to remove and mark is due to the round beam cross section ineffective for Fill. Around area Editing possible is often high percentage overlap the processing zones required.
Darüber hinaus ist das Intensitätsprofil von Strahlen hoher Qualität gaußförmig. Aufgrund der Intensitätsschwellen unterschiedlicher Prozesse. In diesem Fall trägt die Energie/Leistung unterhalb der Schwellenintensität für die Prozesse nicht bei und stellt als Verlust dar.Furthermore is the intensity profile of high quality beams Gaussian. by virtue of the intensity thresholds different processes. In this case, the energy / power carries below the threshold intensity for the Processes do not and represent a loss.
Optimaler Strahlquerschnitt im Bezug auf Flächenfüllung ist rechteckig bzw. quadratisch. Optimale Intensitätsverteilung im Bezug auf effektive Nutzung von Laserenergie/-leistung ist eine Top-Hat-Verteilung. Zur Generierung von Top-Hat Intensitätsverteilung gibt es unterschiedliche optische Anordnungen.optimal Beam cross-section with respect to surface filling is rectangular or square. Optimum intensity distribution in terms of effective use of laser energy / power is a top hat distribution. There are different ways to generate top-hat intensity distribution optical arrangements.
Zu einem wird oft Integrator wie Leichtwellenleiter mit einem runden oder rechteckigen Querschnitt verwendet. Zu anderen wird zur Homogenisierung der Intensität Mikrolinsenarray verwendet. Ein Nachteil der Anordnungen ist die starke Verlust der Strahlqualität nach der Strahlformung.To One often becomes integrator like light waveguide with a round one or rectangular cross-section used. To others is to homogenization the intensity Microlens array used. A disadvantage of the arrangements is the strong loss of beam quality after beam shaping.
Beschreibungdescription
Die vorliegende Erfindung bezieht sich auf optische Anordnungen, mit den die Intensitätsverteilung homogenisiert werden kann, ohne die Strahlqualität deutlich reduziert wird. Im Folgenden werden die optischen Anordnungen gemäß dieser Erfindung am Beispiel eines eindimensionalen Gaußschen Strahls erläutert.The The present invention relates to optical devices with the intensity distribution can be homogenized without the beam quality is significantly reduced. Hereinafter, the optical arrangements according to this Invention explained using the example of a one-dimensional Gaussian beam.
Zur Aufteilung des Strahls kann auch zwei lambda/4-Verzögerungplatten verwendet werden. Dabei werden die zwei lambda/4-Verzögerungsplatten so angeordnet, dass die jeweils etwa die Hälfte des Strahls abdeckt und einer der Teilstrahlen links und der andere rechts zirkular polarisiert ist.to Splitting the beam can also include two lambda / 4 delay plates be used. Thereby the two lambda / 4-delay plates become arranged so that each covers about half of the beam and one of the partial beams on the left and the other on the right circularly polarized is.
Andere Anordnungen von Verzögerungsplatten können zur Erzeugung von Teilstrahlen, die unterschiedliche Polarisationen haben, verwendet werden.Other Arrangements of retarder plates can for generating partial beams having different polarizations have to be used.
Um
die beiden Teilstrahlen räumlich
zwecks Homogenisierung zu überlagern,
wird ein Prisma (
Eine Variation der Ausführung mit einem Prisma bildet eine Anordnung, wo zwei Prismen verwendet werden, die jeweils ein Teilstrahl zugeordnet werden.A Variation of execution with a prism forms an arrangement where two prisms are used which are each assigned a sub-beam.
Bei
den beiden oben genannten Anordnungen wird die Strahlqualität durch
die Prismen reduziert. Dies kann vermieden werden, indem doppelbrechende
Prismen verwendet wird.
Ein
Alternativ zu der in
Beim
Beam-Displacer handelt es sich um ein doppelbrechendes Medium, bei
der Eintritt in das Medium und Austritt aus dem Medium die Strahlen
unterschiedlicher Polarisation unterschiedlich gebrochen wird (vgl.
Statt Verzögerungsplatte zur Veränderung der Polarisation kann auch ein Rotator aus Quartz, Faraday-Rotator aus TGG oder YIG, oder ein Rotator aus Reflektionsflächen etc. sein. Es hat die Eigenschaft, daß im Element Strahlen unterschiedlicher Polarisation sich unterschiedlich schnell ausbreiten, so daß nach einem Durchgang durch das Element die Phasen unterschiedlicher Polarisation ungleiche Verzögerung erfahren und so relative Beziehung zwischen den unterschiedlichen Polarisationskomponenten und der Polarisationszustand geändert wird. Z. B. bei einer lambda/4-Verzögerungsplatte wird ein linearer polarisierter Strahl zu einem zirkular oder elliptisch polarisierten Strahl. Bei einer lambda/2-Verzörgerungsplatte dreht sich die Polarisation um einen Winkel, der doppelt so groß wie der Winkel zwischen der Eingangspolarisation und der optischen Achse der Platte. Die Verzögerungsplatte kann aus Quartz, YVO4, BBO etc bestehen. Ein Rotator ist gekennzeicht, daß die Polarisation sich in Abhängigkeit der Ausbreitungsweg im Rotator dreht.Instead of a retardation plate for changing the polarization can also be a rotator made of quartz, Faraday rotator of TGG or YIG, or a rotator of reflection surfaces, etc. It has the property that rays of different polarization propagate at different rates in the element, so that after passage through the element, the phases of different polarization undergo unequal delay, thus changing the relative relationship between the different polarization components and the polarization state. For example, in a λ / 4 retardation plate, a linear polarized beam becomes a circularly or elliptically polarized beam. In a lambda / 2 retarder plate, the polarization rotates at an angle twice the angle between the input polarization and the optical axis of the plate. The retardation plate can consist of Quartz, YVO 4 , BBO etc. A rotator is characterized in that the polarization rotates depending on the propagation path in the rotator.
Für viele
Anwendung wird frequenzkonvertierte Laserstrahl benötigt. Die
Frequenzkonversion wird mittel nichtlineare Kristall realisiert.
Bei Phasenanpassung Typ II steht die Polarisation der frequenzkonvertierte
Strahl unter 45° zur
Polarisation des Eingangsstrahls. Wird der überlagerte Ausgangsstrahl (
Der ursprüngliche Strahl vor den optischen Anordnungen gemäß vorliegender Patentanmeldung kann durch eine quadratische oder rechteckige Blende aus einem Strahl mit einem beliebigen Querschnitt abgeleitet werden. Dies ist mit Leistungsverlust verbunden.Of the original Beam in front of the optical arrangements according to the present patent application through a square or rectangular aperture of a ray be derived with any cross section. This is with Power loss associated.
Verlustfrei kann ein Strahl mit einem quadratischen oder rechteckigen Querschnitt mit einem Slablaser, deren Verstärkungsvolumen einen quadratischen oder rechteckigen Querschnitt haben, generiert werden. Zur Erzeugung eines Strahls mit einem quadratischen oder rechteckigen Querschnitt wird ein Scheibenlaser so gebildet, dass das scheibenförmige Medium mit Pumpstrahl oder Pumpstrahlen so gepumpt wird, dass es einen quadratischen oder rechteckigen Verstärkungsbereich hat.lossless can be a beam with a square or rectangular cross section with a slab laser, whose gain volume have a square or rectangular cross section generated become. For generating a beam with a square or rectangular section, a disk laser is formed so that the disc-shaped Medium pumped with pumping or pumping jets so that it is has a square or rectangular gain area.
Für Erzeugung von Strahlen mit quadratischen oder rechteckigen Querschnitt wird das Kern von Faserlaser quadratisch oder rechteckig ausgebildet.For generation of rays with square or rectangular cross section becomes the core of fiber laser square or rectangular formed.
Claims (17)
Priority Applications (1)
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DE102006050155.1A DE102006050155B4 (en) | 2006-10-21 | 2006-10-21 | Arrangements for shaping laser beams |
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DE102006050155.1A DE102006050155B4 (en) | 2006-10-21 | 2006-10-21 | Arrangements for shaping laser beams |
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DE102006050155B4 DE102006050155B4 (en) | 2016-06-09 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101833169A (en) * | 2010-04-15 | 2010-09-15 | 中国科学院上海光学精密机械研究所 | A device for converting laser linearly polarized beams into crosshair beams |
WO2013126378A1 (en) * | 2012-02-21 | 2013-08-29 | Corning Incorporated | Method and apparatus for combining laser array light sources |
US8599485B1 (en) | 2012-05-25 | 2013-12-03 | Corning Incorporated | Single-emitter etendue aspect ratio scaler |
US8830587B2 (en) | 2011-05-31 | 2014-09-09 | Corning Incorporated | Method and apparatus for combining light sources in a pump laser array |
DE102016011555A1 (en) | 2016-09-25 | 2018-03-29 | Keming Du | Optical arrangements for the symmetrization of intensity distributions |
DE102018103131A1 (en) * | 2018-02-13 | 2019-08-14 | Innovavent Gmbh | Optical system for processing at least one incoming laser beam |
DE102020007923B3 (en) | 2020-12-31 | 2022-05-05 | Keming Du | Optical arrangements for generating multi-beams |
DE102018001667B4 (en) | 2018-03-04 | 2023-09-28 | Edgewave Gmbh | Arrangements for generating frequency-converted beams with top-hat intensity profile |
DE102022001953A1 (en) | 2022-06-05 | 2023-12-07 | Keming Du | Arrangements for generating frequency-converted beams with top-hat intensity profile |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4822151A (en) * | 1987-10-19 | 1989-04-18 | Hitachi Ltd. | Optical device with phase-locked diodelaser array |
DE3636336C2 (en) * | 1985-10-25 | 1992-05-14 | Hitachi, Ltd., Tokio/Tokyo, Jp | |
JPH1062714A (en) * | 1996-08-19 | 1998-03-06 | Fuji Photo Film Co Ltd | Method of controlling beam diameter and device therefor |
DE10113019A1 (en) * | 2001-03-17 | 2002-09-19 | Lissotschenko Vitalij | Beam shaper has boundary surface at which sub-beams are incident from different directions; one sub-beam passes through surface, the other is reflected to combine beams |
DE69910326T2 (en) * | 1998-10-20 | 2004-06-09 | Eastman Kodak Co. | Optical device and method for increasing the intensity of multimode laser beams and printer for printing lenticular images with the aid of such laser beams |
-
2006
- 2006-10-21 DE DE102006050155.1A patent/DE102006050155B4/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3636336C2 (en) * | 1985-10-25 | 1992-05-14 | Hitachi, Ltd., Tokio/Tokyo, Jp | |
US4822151A (en) * | 1987-10-19 | 1989-04-18 | Hitachi Ltd. | Optical device with phase-locked diodelaser array |
JPH1062714A (en) * | 1996-08-19 | 1998-03-06 | Fuji Photo Film Co Ltd | Method of controlling beam diameter and device therefor |
DE69910326T2 (en) * | 1998-10-20 | 2004-06-09 | Eastman Kodak Co. | Optical device and method for increasing the intensity of multimode laser beams and printer for printing lenticular images with the aid of such laser beams |
DE10113019A1 (en) * | 2001-03-17 | 2002-09-19 | Lissotschenko Vitalij | Beam shaper has boundary surface at which sub-beams are incident from different directions; one sub-beam passes through surface, the other is reflected to combine beams |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101833169A (en) * | 2010-04-15 | 2010-09-15 | 中国科学院上海光学精密机械研究所 | A device for converting laser linearly polarized beams into crosshair beams |
US8830587B2 (en) | 2011-05-31 | 2014-09-09 | Corning Incorporated | Method and apparatus for combining light sources in a pump laser array |
WO2013126378A1 (en) * | 2012-02-21 | 2013-08-29 | Corning Incorporated | Method and apparatus for combining laser array light sources |
US8861082B2 (en) | 2012-02-21 | 2014-10-14 | Corning Incorporated | Method and apparatus for combining laser array light sources |
US8599485B1 (en) | 2012-05-25 | 2013-12-03 | Corning Incorporated | Single-emitter etendue aspect ratio scaler |
DE102016011555A1 (en) | 2016-09-25 | 2018-03-29 | Keming Du | Optical arrangements for the symmetrization of intensity distributions |
DE102016011555B4 (en) | 2016-09-25 | 2019-08-14 | Keming Du | Optical arrangements for the symmetrization of intensity distributions |
DE102018103131A1 (en) * | 2018-02-13 | 2019-08-14 | Innovavent Gmbh | Optical system for processing at least one incoming laser beam |
DE102018103131B4 (en) | 2018-02-13 | 2020-07-09 | Innovavent Gmbh | Device for generating an illumination line, optical system and method for processing at least one incoming laser beam |
DE102018001667B4 (en) | 2018-03-04 | 2023-09-28 | Edgewave Gmbh | Arrangements for generating frequency-converted beams with top-hat intensity profile |
DE102020007923B3 (en) | 2020-12-31 | 2022-05-05 | Keming Du | Optical arrangements for generating multi-beams |
DE102022001953A1 (en) | 2022-06-05 | 2023-12-07 | Keming Du | Arrangements for generating frequency-converted beams with top-hat intensity profile |
Also Published As
Publication number | Publication date |
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DE102006050155B4 (en) | 2016-06-09 |
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