Schmitt, R., Pavim, A., Brecher, C., Pyschny, N., Loosen, P., Funck, M., ...
Automated assembly of high-quality optical systems is a challenging task and frequently decides upon product quality and costs and thereby upon success or failure of a product. This article describes...
Schmitt, R., Pavim, A., Brecher, C, Pyschny, N., Loosen, P., Funck, M.
Dieser Beitrag beschreibt die grundlegenden Ideen, Konzepte und ersten Ergebnisse der RWTH Aachen für eine flexibel automatisierte Montage von diodengepumpten Festkörperlasern für Beschriftungen....
Mahlmann, D.M., Jahnke, J., Loosen, P.
The transmitted double-beam interference microscope was used to determine the dry weight per unit biovolume of single living cells, trichomes and mucous sheaths of eight mainly terrestrial species of...
Heat transport in solid and air-clad fibers for high-power fiber lasers (2007)
Zintzen, B., Langer, T., Geiger, J., Hoffmann, D., Loosen, P.
An analytical approach for the thermal design for high-power fiber lasers and fiber components is presented. The approach is based on defining a thermal resistance for each fiber layer. Thus the...
Effective cooling for high-power fiber lasers (2007)
Zintzen, B., Emmerich, A., Geiger, J., Hoffmann, D., Loosen, P.
Homogenization of high power diode laser beams for pumping and direct applications (2006)
Traub, M., Wieching, K., Loosen, P., Poprawe, R.
High power diode lasers have become an established source for numerous direct applications like metal hardening and polymer welding due to their high efficiency, small size, low cost and high...
Status and trends in the development of high-power diode lasers and their applications (2005)
In the past few years diode lasers have evolved into tools for industrial manufacturing for instance for soldering, plastics welding, transformation hardening and heat-conduction welding. The high...
MOPA with kW average power and multi MW pulse power (2005)
Nicklaus, K., Hoffmann, D., Hoefer, M., Luttmann, J., Loosen, P., Poprawe, R.
A Nd:YAG MOPA combining rod and slab geometry with 1.3 kW average, 24 MW peak power and 5.4 ns pulse duration at 10 kHz repetition rate has been developed. Birefringence compensation guarantees good...
Optische Verstaerker-Anordnung (2005)
Du, K., Loosen, P., Poprawe, R.
WO 200074185 A UPAB: 20010716 NOVELTY - An amplifying device (1) has an approximately rectangular cross section and long and short edges. Two highly reflective mirrors (2,3) sit either side the...
Diode and DPSS laser trends and applications (2005)
With the advent of high power diode Lasers having lifetimes in excess of 10,000 hours at long term operational power levels around 50W per diode bar, diode-pumped solid state lasers are increasingly...
Characterization of tapered diode laser bars for the use in high power diode laser systems (2004)
Knitsch, A., Traub, M., Rotter, K., Hoffmann, D., Loosen, P., Poprawe, R.
For further development in beam quality of high power diode laser systems a new type of diode laser bars has been realized recently. Compared to commercially available broad area diode laser bars the...
Anordnung zum Multiplexing und/oder Demultiplexing (2004)
Du, K., Loosen, P., Poprawe, R.
DE 10122010 A UPAB: 20020626 NOVELTY - The arrangement has at least one polarizing element, whereby the waves enter the polarizing element linearly polarized. Statistically polarized waves are...
Pulsed high power solid state laser for high-speed precision machining (2003)
Nicklaus, K., Hoffmann, D., Meyer, R., Sträßer, A., Warias, C., Loosen, P., ...
High-speed precision machining techniques (e.g. percussion drilling or surface structuring) require high power pulsed lasers with excellent beam quality. A Nd:YAG MOPA-System, designed for nanosecond...
Adapted diode laser modules for materials processing (2003)
Knitsch, A., Hoffmann, D., Loosen, P., Poprawe, R.
Besides their high efficiency and compact dimensions high power diode laser systems feature the modularity to from different beam shapes adapted to the respective application. So apart from the...
Homogenized high power diode laser systems for material processing and illumination (2003)
Traub, M., Hoffmann, P., Loosen, P., Poprawe, R.
Commercially available diode laser bars usually suffer from an intensity distribution not suited for direct applications like hardening, metal and polymer welding, and surface inspection. For these...
Anordnung zur Fuehrung und Formung von Strahlen eines geradlinigen Laserdiodenarrays (2003)
An arrangement for guiding and shaping rays of a straight-line laser diode array having ray exit facets lying in a common plane by means of reflecting optics. In order to project the rays of the...
The device includes a reflective block (5) onto which at least two parallel output radiation field parts of a one or two dimensional array (3) of solid state or semiconductor lasers are directed. The...
New lasers and applications in innovative technologies (2003)
Kreutz, E.W., Poprawe, R., Loosen, P., Hoffmann, D.
Diode-pumped solid-state lasers are not only beginning to substitute the established laser sources like CO2 and lamp-pumped Nd:YAG lasers, which lead to new Laser applications because of their high...
Diode laser modules of highest brilliance for materials processing (2002)
Knitsch, A., Luft, A., Groß, T., Ristau, D., Loosen, P., Poprawe, R.
Beam quality and output power of mostly 2-dimensional stacked diode laser systems are insufficient for the demands of materials processing. To increase the output power at almost constant...
Modular, fiber coupled, diode pumped solid state laser with up to 5 kW average output power (2001)
Hoffmann, D., Bonati, G., Kayser, P.F., Loosen, P., Poprawe, R., Dinger, R., ...
A modular diode pumped Nd:YAG laser with an average output power up to 5 kW has been developed. The beam quality is optimized for high efficiency fiber coupling. Experimental results of power scaling...
Nicklaus, K., Hoffmann, D., Loosen, P., Poprawe, R.
A diode pumped Nd:YAG master oscillator power amplifier (MOPA) configuration designed for average power in the kW-regime at high repetition rates has been investigated. The configuration is optimized...
Improving the brightness of a diode end pumped slab laser by a new pumping scheme (2001)
Schnitzler, C., Schmidt, G., Loosen, P., Poprawe, R.
This report deals with a Nd:YAG slab laser partially end pumped by a diode laser stack with 40 diode lasers. The pumped volume has a rectangular gain cross section. A hybrid resonator, which is...
Preliminary results from key experiments on sources for EUV lithography (2001)
Lebert, R., Aschke, L., Bergmann, K., Dusterer, S., Gabel, K., Hoffmann, D., ...
While huge progress has been achieved for EUVL system design and multilayer optics during the last years the decision on the best suited source is still open. In a German basic research cooperation...
Scaling the output power of a diode end pumped ND:YAG slab laser with a hybrid resonator (2000)
Schmidt, G., Schnitzler, C., Giesekus, J., Wester, R., Du, K., Loosen, P., ...
This report deals with a Nd:YAG slab laser that is partially end pumped by a diode laser stack with 14 diode lasers. The pumped volume has a rectangular cross section. A hybrid resonator, which is...
Axial line scanning device for display and printing applications (2000)
Falter, S., Kubaink, J., Du, K., Loosen, P., Poprawe, R.
Conventional two dimensional scanning methods operate by a two axis variable mirror system to deflect onel aser beam over the whole image field. Hence there occur two different deflection...
UV beam sources for double pulse generation (2000)
Falter, S., Du, K., Loosen, P., Poprawe, R.
An even higher integration in semiconductor technology can be realized with a memory technology based on thin film ferroelectrical materials. Because these materials are usually transparent to light...
Highly efficient diode end pumped Nd:YAG slab laser (2000)
Giesekus, J., Schmidt, G., Schnitzler, C., Mans, T., Wester, R., Du, K., ...
High power diode pumped solid state lasers are auspicious sources for various applications in material processing. The solid state laser we report on is a Nd:YAG slab laser, that is partially end...
Modelling of partially end-pumped Nd:YAG slab laser (2000)
Schmidt, G., Giesekus, J., Schnitzler, C., Mans, T., Wester, R., ...
Intra- und Extra-Cavity-Strahlformung durch optische Komponenten mit variabler Reflexion (2000)
Kreutz, E.W., Henning, T., Bernges, J., Unnebrink, L., Poprawe, R., Poignand, R., ...
Die Eigenschaften der Werkstoffe und der Laserstrahlung bestimmen mit den Verfahrensparametern das Bearbeitungsergebnis bei der Materialbearbeitung mit Laserstrahlung, welches bei vorgegebener...
High-power diode laser bars (2000)
Mikulla, M., Walther, M., Kiefer, R., Jandeleit, J., Brandenburg, P., Loosen, P., ...
Cooling and packaging of high-power diode lasers (2000)
An overview of cooling and packaging of high-power diode lasers is given. The discussion concentrates on diode lasers in bar geometry, typically 10 mm-wide, which are soldered on actively cooled...
Endgekuehlte Verstaerker bzw. Lasersysteme (2000)
Du, K., Loosen, P., Poprawe, R.
DE 19860921 A UPAB: 20000823 NOVELTY - The active laser medium comprises a cooling surface (2) which lies in thermal contact with a heat sink (1) to cool the medium. The laser medium is held...
Reliability and degradation mechanisms of InGa(Al)As/GaAs DQW high-power diode lasers (2000)
Kreutz, E.W., Wiedmann, N., Jandeleit, J., Hoffmann, D., Loosen, P., Poprawe, R.
Defects and degradation of InGa(Al)As/GaAs DQW diode laser bars mounted on copper micro-channel heat sinks were investigated. The analytical techniques used are optical microscopy and scanning...
Industrial applications of high power diode lasers (1999)
Gillner, A., Loosen, P., Petring, D., Wissenbach, K., Poprawe, R.
Lasers in material processing (1999)
Over the past two decades lasers have developed into reliable, productive and widely used tools in industrial manufacturing. Even more use would be made of lasers if the cost, size and weight of the...
Apertur fuer Laserstrahlung hoher Strahlungsdichte (1999)
Du, K., Poprawe, R., Loosen, P.
DE 19910725 A UPAB: 19991124 NOVELTY - The aperture (1) absorbs between 0 and 1 per cent of the laser radiation for a defined aperture thickness. A region of the aperture surface deflects or couples...
Fabrication and characterization of high power diode lasers (1999)
Jandeleit, J., Wiedmann, N., Ostlender, A., Brandenburg, W., Loosen, P., Poprawe, R.
High power diode lasers can be used for a lot of applications such as pumping of solid state lasers, direct material processing and printing. The successful use of high power lasers depends on their...
Vorrichtung und Verfahren zur Erzeugung von Teilstrahlen fuer einen Linienscanner (1999)
Falter, S., Du, K., Loosen, P., Poprawe, R.
NOVELTY - The line scanner has a first beam guide (1) along a guide line and one or more decouplers of partial beams (3) from the first beam at several positions (2) along the guide line. One or more...
Du, K., Loosen, P., Poprawe, R.
The system comprises at least one laser as a light source, an acousto-optical scanner, and a reproduction optical system. At least one laser beam with an axial or Z-propagation direction is coupled...
Verfahren und Vorrichtung zum Herstellen oxidationsempfindlicher Loetverbindunden (1998)
Biesenbach, J., Neff, W., Pochner, K., Strang, U., Loosen, P.
Producing a joint between metal surfaces such as, for example, workpiece and solder or two workpieces, comprises providing chemically active gas radicals or ions so that before or during the joining...
Q-switch behaviour of different solid state laser hosts (1998)
Falter, S., Schröder, O., Loosen, P., Poprawe, R.
Fulltext: From experiments with Q-switched solid state lasers it is known that a typical repetition rate exists, being characteristical for the employed laser crystal. If the actual repetition rate...
Partially end-pumped Nd:YAG slab laser with a hybrid resonator (1998)
Du, K., Wu, N., Xu, J., Giesekus, J., Loosen, P., Poprawe, R.
A Nd:YAG slab is partially end pumped by a diode laser stack with three diode laser bars. The pumped volume has a rectangular cross section. A hybrid resonator which is stable in the plane of small...
Packaging high-power diode laser bars using microchanneled copper mounts (1998)
Loosen, P., Ebert, T., Jandeleit, J., Treusch, G.
High-power diode lasers with an average output power of several 10 W and above are growing into key components for modem laser systems and applications in e.g. materials processing and medicine....
Neue Entwicklungen bei Hochleistungs-Diodenlasern und diodengepumpten Festkörperlasern (1998)
Hochleistungs-Diodenlaser eröffnen die Möglichkeit für Strahlquellen mit bisher nicht realisierbarer Kompaktheit und hohem Wirkungsgrad. Aufgrund erheblicher Fortschritte in der Halbleitertechnik...
Du, K., Loosen, P., Poprawe, R., Yu, X.
The laser device has several diodes which emit laser light preferably low order mode light. The diodes are arranged in a plane parallel to each other and at a distance (D) from each other. The diode...
Falter, S., Du, K., Liao, Y., Zhang, J., Quade, M., Loosen, P., ...
A laser system effects frequency doubling by means of a laser medium within a resonator, the maximum achievable efficiency for stable laser operation being determined by the maximum achievable...
High average power diode end-pumped passively Q-switched solid state laser (1998)
Wu, N., Falter, S., Loosen, P., Poprawe, R.
Fulltext: Passively Q-Switched solid state lasers are of high interest for many applications like marking that do not require accurate repetition rates. With Cr4+ doped YAG as a saturable absorber it...
Gain at the end configuration of a diode-pumped, Kerr-lens mode-locked Cr:LiSGaF laser (1998)
Rußbüldt, P., Gäbel, K., Du, K., Lebert, R., Loosen, P., Poprawe, R., ...
Fulltext: Currently the widespread application of fs-lasers is limited by price and complexity. One approach for userfriendly systems are diode-pumped Kerr-lens mode-locked (KLM) fs-lasers with...
Hochleistungs-Diodenlaser eröffnen die Möglichkeit für Strahlquellen mit bisher nicht realisierbarer Kompaktheit und hohem Wirkungsgrad. Aufgrund erheblicher Fortschritte in der Halbleitertechnik...
Diode pumped, chirped mirror dispersion compensated, fs-laser (1998)
Gäbel, K., Rußbüldt, P., Lebert, R., Loosen, P., Poprawe, R., Heyer, H., ...
We demonstrate the first diode pumped, Kerr-lens mode locked fs-laser which is completely dispersion compensated by chirped mirrors. Low loss chirped mirrors together with advanced pump diodes...
Development of high beam-quality CO2 lasers exceeding 20 kW and industrial applications (1998)
Habich, U., Bartels, H., Henning, T., Loosen, P., Hertzler, C.
Beam-shaping technique for high brightness with high-power diode laser arrays (1998)
Baumann, M., Röhner, M., Loosen, P., Poprawe, R.
Fulltext: Because of the asymmetric emission characteristics of high-power diode laser bars, beam shaping is essential for coupling the light into a fibre. Preservation of the high brightness is the...
The appts. includes one or more solid-state and/or semiconductor lasers (1) and several corresponding refractive elements (5). The lasers are in the form of an array and the refractive elements act...
38W Nd:YAG slab laser partially end pumped by a stack with 3 diode laser bars (1998)
Wu, N., Xu, J., Giesekus, J., Liao, Y., Du, K., Loosen, P., ...
Fulltext: To scale the output power of diode pumped solid state lasers at high beam quality, high efficiency and low cost, we have developed a novel slab laser concept, which consists of slab-shaped...
Advanced concepts of using diode lasers in materials processing (1997)
Recent improvements in the performance of high-power diode lasers and beam shaping techniques are driving developments of diode laser systems for direct industrial material processing. The paper...
Vom Exoten zum Standardwerkzeug: Trends bei Lasern in der Metallbearbeitung (1997)
Poprawe, R., Loosen, P., Gillner, A., Bauer, A.
Zweistellige Wachstumsraten in der Laserbranche und ständig neue Einsatzfelder sind ein Zeichen für die Innovationskraft deutscher Unternehmen in der Lasertechnik. Dies trifft sowohl auf die...
Stability of lasers with intracavity second order nonlinearity (1997)
Falter, S., Du, K., Liao, Y., Quade, M., Zhang, J., Loosen, P., ...
On the basis of the dynamical model for the intracavity frequency-doubled laser we demonstrate a criterion for the stable operation of laser-resonators with intracavity nonlinear elements. This...
Polarization characteristics of a Nd:YAG laser side pumped by diode laser bars (1997)
Zhang, J., Quade, M., Liao, Y., Falter, S., Du, K., Loosen, P.
A detailed experimental investigation of the polarization characteristics of a diode laser side-pumped Nd:YAG laser has been performed. A Brewster plate inserted into the cavity resulted in a...
Parallel diode-pumped frequency doubled Nd:YAG laser (1997)
Quade, M., Du, K., Falter, S., Zhang, J., Loosen, P., Poprawe, R., ...
Nonlinear optical devices, such as harmonic generators, provide a means of extending the frequency range of available laser sources. In this paper we report on a novel concept for scaling the output...
Optimization of micro channel heat sinks for high power diode lasers in copper technology (1997)
Ebert, T., Biesenbach, J., Loosen, P., Poprawe, R., Treusch, H.G.
Basis of the developments discussed in the presentation are 10 mm GaAs diode laser bars mounted on copper micro channel heat sinks. Optimizing the micro channel heat sinks leads to decreased thermal...
New concepts for compact diode-pumped fs-lasers (1997)
Gäbel, K., Rußbüldt, P., Rotarius, G., Bette, B., Lebert, R., Du, K., ...
We report the successful implementation of Gires-Tournois(GTI) and chirped mirrors in a diode-pumped, Kerr-lens modelocked (KLM) Cr:LiSGaF laser. The laser delivered 30mW of 79fs nearly transform...
Nd:YAG slab laser partially end-pumped by diode laser stack (1997)
Liao, Y., Du, K., Falter, S., Zhang, J., Quade, M., Loosen, P., ...
An efficient high power cw Nd:YAG slab laser, partially end pumped by diode laser stacks is described in this paper. With conventional stable resonator, the optical efficiency amounted to 44 per cent...
Nd:YAG slab laser end-pumped by laser-diode stacks and its beam shaping (1997)
An efficient high power cw Nd:YAG slab laser, partially end-pumped by diode laser stacks, and a novel beam shaping technique are reported in this paper. The optical efficiency amounted to 44 per cent...
Laserresonator für Laser-Medien mit ringförmigem Querschnitt (1997)
Habich, U., Du, K., Bauer, A., Plum, H.D., Loosen, P.
The description refers to a laser resonator for the utilization of media having an annular-shaped cross-section and two end mirrors. The invention is characterized by the end mirrors having a...
Laser-plasma processes in laser-technology (1997)
Poprawe, R., Beyer, E., Loosen, P., Wester, R., Lebert, R.
Plasmas are indispensable in laser technology. For applications such as media for high power lasers, laser machining, quality monitoring, chemical analysis and high brightness short wavelength...
Highly efficient diode-stack, end-pumped Nd:YAG slab laser with symmetrized beam quality (1997)
Liao, Y., Du, K., Falter, S., Zhang, J., Quade, M., Loosen, P., ...
An efficient high-power cw Nd:YAG slab laser, partially end pumped by diode-laser stacks, and a novel beam-shaping technique are reported. The optical efficiency amounted to 44 per cent, and the...
Fiber-coupling technique with micro step-mirrors for high-power diode laser bars (1997)
Du, K., Baumann, M., Ehlers, B., Treusch, H.G., Loosen, P.
A technique for coupling the output of a high-power diode laser bar into one multimode fiber with high efficiency, easy alignment requirements and low manufacturing costs is demonstrated using a...
Efficient TEM(00) operation of Nd:YVO4 laser end pumped by fibre-coupled diode laser (1997)
Zhang, J., Quade, M., Du, K., Liao, Y., Falter, S., Baumann, M., ...
We have demonstrated efficient TEM00 operation of the Nd:YVO4 rod laser, one-end-pumped by a fibre-coupled diode laser. 11.6-W linearly polarized laser output with an optical efficiency of 54 per...
Efficient TEM(00) operation of Nd:YVO4 laser end pumped by fibre-coupled diode laser (1997)
Zhang, J., Quade, M., Du, K., Liao, Y., Falter, S., Baumann, M., ...
The authors have demonstrated efficient TEM(00)operation of the Nd:YVO4 rod laser, one-end-pumped by a one-fibre-coupled diode laser. A 11.6W linearly polarised laser output with an optical...
Dynamics and stability of a laser system with second-order nonlinearity (1997)
Falter, S., Du, K., Liao, Y., Quade, M., Zhang, J., Loosen, P., ...
We use a multimode rate-equation model to investigate the stability of a laser system with second-order nonlinearity and compare the results with the literature on intracavity frequency-doubled...
Cylindrical microlenses for collimating high-power diode lasers (1997)
Sturm, V., Loosen, P., Treusch, H.G.
Monolithic linear arrays of diode lasers, also known as diode laser bars, are the basic elements for most high-power laser applications such as solid-state laser pumping or material processing....
Compact fibre-coupled high-power diode-laser unit (1997)
Baumann, M., Ehlers, B., Quade, M., Du, K., Loosen, P., Poprawe, R., ...
We developed a compact fibre-coupled high-power diode-laser unit with optical output power up to 40 W cw, coupled into a multimode fibre with 600 mu m core diameter and NA 0.22. This diode-laser unit...
Beam shaping and fibre coupling of high-power diode laser arrays (1997)
Du, K., Baumann, M., Loosen, P., Poprawe, R., Treusch, H.G.
A technique for coupling the radiation of a high-power diode laser bar into one multimode fibre with high efficiency, easy alignment requirements and low manufacturing costs is demonstrated using a...
Du, K., Ehrlichmann, D., Habich, U., Loosen, P.
The device includes a reflection block (8) onto which the outputs (7) of an array of gas laser elements (1) are incident parallel to each other. The laser outputs, separated into at least two parts,...
Advanced concepts of using diode lasers in materials processing (1997)
Recent improvements in the performance of high-power diode lasers and beam shaping techniques are driving developments of diode laser systems for direct industrial material processing. The paper...
Krause, V., Beyer, E., Gillner, A., Loosen, P.
Device for the handling of grain-oriented workpiece tracks, panels or similar workpieces (10) by means of focused light, in particular electric sheet steel, by means of a light beam directed at a...
Laser resonators with at least two resonator mirrors bordering on the resonator are known, in the ray path of which an active laser medium emitting a radiation and at least a folding element...
Design and industrial applications of high-power diode-lasers (1996)
Loosen, P., Biesenbach, J., Du, K., Haas, C.R., Poprawe, R., Treusch, H.G.
Developments concerning high-power diode lasers, optical systems for beam shaping and superposition and complete systems for direct materials processing will be discussed, along with examples of...
Anwendungsmöglichkeiten von Hochleistungsdiodenlasern in der industriellen Fertigung (1996)
Hochleistungsdiodenlaser sind gegenüber konven tionellen CO2- und Festkörperlasern kompakter, einfacher zu handhaben und haben einen deutlich höheren Wirkungsgrad. Ein einzelner Diodenlaserbarren...
Du, K., Loosen, P., Maerten, O., Linzenich, B.
The invention relates to a process and a device for adjusting beam guidance and shaping and for aligning optical systems, in particular in laser systems. In the processor according to the invention,...
Niehoff, J., Jarosch, U., Loosen, P.
In the development of fast axial flow (FAF) high power CO2 lasers the increase of mass flow and the reduction of phase distortions are of main interest in the realisation of high output power with...
Measurement of statistical phase distortions of active medium (1995)
Du, K., Niehoff, J., Stewen, C., Loosen, P.
The trend of development in fast axial flow CO2 lasers with transversal RF excitation leads to increasing laser power with high beam quality. Since the power density of the discharge is limited due...
Laserresonator mit ringförmigem Querschnitt (1995)
Du, K., Loosen, P., Habich, U.
Beschrieben wird ein Laserresonator mit zwei einander zugewendeten Spiegeln und mit einer Strahlauskoppelstelle. Erfindungsgemäß ist die Spiegelfläche wenigstens eines Spiegels derart ausgebildet,...
Diodenlaser und ihre Entwicklung (1995)
Diodenlaserbarren, montiert auf Kupfer-Mikrokanalkühlern können bei Ausgangsleistungen bis zu ca. 30 W pro Bauelement sicher betrieben werden. Durch Stapeltechniken kann die Ausgangsleistung bis in...
Development of an industrial CO2 laser with more than 40 kW output power. Recent results (1995)
Habich, U., Du, K., Ehrlichmann, D., Jarosch, U., Niehoff, J., ...
Results of power scaling experiments on high power CO2 lasers for industrial applications are given. RF-excited systems with fast axial gas flow (FAF) and fast gas flow in an annular discharge gap...
Recent developments in new laser systems used for material processing (1994)
Beyer, E., Krause, V., Loosen, P.
No abstract available
Laser mit Schwingspiegel zur Leistungsmodulation (1994)
Sturm, V., Loosen, P., Herziger, G.
Laser with a periodically oscillating mirror (S3) reflecting the laser beam (10) in the resonator (11). In order to improve a laser having the features mentioned above such that its radiant power can...
Recent developments in new laser systems used for material processing (1994)
Beyer, E., Krause, V., Loosen, P.
No abstract available
Recent developments in new laser systems used for material processing (1994)
Beyer, E., Krause, V., Loosen, P.
No abstract available
Vorrichtungen zur elektrischen Anregung eines Gases mit Mikrowellenenergie (1993)
Klein, J., Rettich, T., Pflueger, S., Loosen, P.
Vorrichtung (10) zur elektrischen Anregung eines Gases mit Mikrowellen, mit einem von einem Mikrowellensender gespeisten Hohlleiter (11), der einen Mikrowellenenergie zum Zuenden und Aufrechterhalten...
Verfahren zum Bearbeiten von Werkstuecken mit Laserstrahlung (1993)
Beyer, E., Herziger, G., Loosen, P., Poprawe, R.
Process for the processing of workpieces by means of laser radiation, which generates a non-shielding, energy-coupling, laser-beam induced plasma at the point at which the workpiece is machined by...
Laserresonator, insbesondere fuer Kohlendioxidlaser, mit zwei Resonator-Endspiegeln, die aktives Material zwischen zwei vollreflektierenden Endspiegelflaechen aufweisen, welche einen instabilen...
Advances in CO2-laser technology for industrial applications (1993)
At the time being CO2-lasers are widely used in industrial applications. The increasing number of demanding applications as well as market needs are defining several trends in laser development. For...
Vorrichtung zur Messung des zeitlichen Verlaufs der Strahlung von Lasern (1992)
Loosen, P., Sturm, V., Drenker, A.
Device for the measurement of the radiation power of lasers, in particular infrared lasers, comprising a thermal detector which emits a power-related measurement signal. In order to measure rapid...
Recent developments of lasers for materials processing (1992)
This paper gives an overview on actual activities at the ILT concerning the development of laser systems for industrial applications, including new aproaches for diffusion-cooled CO2-lasers in the...
Diffusionsgekuehlter Laser, vorzugsweise CO2-Laser (1992)
Loosen, P., Klein, J., Otto, G.
Diffusion-cooled lasers, preferably CO
Verfahren und Vorrichtung zur Erzeugung von Laserstrahlung hoher Leistung und guter Qualitaet (1991)
Process for the production of high power and high quality laser radiation, in particular for high- performance solid state lasers by which the radiation of several single beams (2a to 2c) generated...
Laser und Verfahren zur Erzeugung von Laserstrahlung (1991)
Herziger, G., Loosen, P., Treusch, H.G.
The active material (10) is pumped by the light (11) of a gas discharge lamp (12). Thus higher power levels can be attained with the laser and the useful life of the gas discharge lamp (12) is...
Du, K., Loosen, P., Herziger, G.
Laser, consisting of a beam path multiple-folded by means of two cavity end mirrors and having at least one reflector folding the laser beam retroreflectively, the axis of which is arranged offset in...
Herziger, G., Loosen, P., Maerten, O., Boening, H.
Gas laser, especially a carbon dioxide laser with two coaxial high-voltage electrodes (5, 7) forming an annular gas discharge cavity (10) through which gas flows, at whose ends mirrors (3, 11) are...
Klein, J., Loosen, P., Pflueger, S.
Gas discharge system, with a gas discharge tube containing especially laser gas in a cylindrical cavity, with a tube-shaped housing surrounding the cylindrical cavity at a distance, and with a...
Verfahren und Einrichtung zum Bearbeiten von Werkstuecken mittels Laserstrahl (1990)
Herziger, G., Beyer, E., Loosen, P., Poprawe, R.
In order to achieve maximum absorption of laser radiation in the workpiece during workpiece machining using a laser beam while attaining minimum interference through optical feedback and plasma, the...
Herziger, G., Loosen, P., Maerten, O., Boening, H.
Gas laser, in particular a carbon dioxide laser, having a gas discharge chamber between high-tension electrodes free from inserts, having a beam path of two resonator mirrors, the beam beeing folded...
AERODYNAMISCHES FENSTER FUER EINEN GASLASER (1990)
Du, K., Franek, J., Loosen, P.
Aerodynamisches Fenster fuer einen Gaslaser, dessen aktive Kammer einen fokussierten Laserstrahl abgibt und mittels einer Strahldurchtrittsoeffnung mit einer an einer Vakuumpumpe angeschlossenen...
Beyer, E., Loosen, P., Kramer, R.
Verfahren zum Justieren eines Laserresonators, bei dem mindestens ein Resonatorspiegel quer zur Achse des aktiven Materials verkippt wird, bis die Laserleistung maximal wird. Um eine optimale...
The invention relates to a laser, in particular a carbon dioxide laser having a multiple folded narrow entrance between two resonant end mirrors, for which flat reflector surfaces exist for folding,...
EINRICHTUNG ZUM ERFASSEN DER RADIALEN INTENSITAETSVERTEILUNG EINER LASERSTRAHLUNG (1988)
Beyer, E., Kramer, R., Loosen, P.
An einem drehbar gelagerten Traeger, dessen Drehachse zur Achse des Laserstrahls parallel ist, ist in radialer Erstreckung ein Wellenleiter angeordnet. Dessen aeusseres Ende kreuzt waehrend einer...