Auslegung und Integration des CO_2-Hochleistungslasers Abschlussbericht

As part of an international research project for the development and testing of a flexible laser device for surface coating, in this report the layout and integration of the high-performance CO_2 laser is presented. The work includes the following topics: compiling of demands on the laser efficiency, testing and modification of CO_2 lasers > 5 kW with stable and instable resonators, measuring of beam divergence and directional stability, influence of mode-distribution and laser parameters, process response, conception for quick power control, development of hardness optics and hardness tests. The properties of an optimal laser are formulatedSIGLEAvailable from TIB Hannover: F93B1334+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Eurolaser Definitionsphase Festkoerperlaser. Koordinierung der Aktivitaeten der am Gesamtprojekt beteiligten Arbeitsgruppen waehrend der Definitionsphase. T. 1 Abschlussbericht

SIGLETIB Hannover: D.Dt.F. AC 1000(32,51) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Innovativer LEICHTbau durch EneRgiereduziertes Fuegen mit Lasersystemen neuester Generation (LEICHTER) Endbericht

SIGLEAvailable from TIB Hannover: F04B1718 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany)DEGerman

Neue physikalische Wirkprinzipien bei Hochleistungs-Gaslasern. Stroemungsgekuehlte und diffusionsgekuehlte CO_2-Laser mit Strahlleistungen > 5 kW Abschlussbericht

In the power range between 1 kW and 10 kW the world market for industrial laser materials processing has been dominated by fast flow CO_2 lasers either rf excited or dc excited. This research project deals with two different solutions which both promise fundamental progress with respect to today's available technology. The principal objective of the first part of this project has been to increase the total output power of radiofrequency excited slab waveguide CO_2 lasers. This goal has been realised in three steps. For a single module slab, the maximum output power has been increased to 3.3 kW by improvements of the rf matching and of the waveguide characteristics. The size of a single module was optimised and a double module slab has been built. The maximum output power achieved has been 4.2 kW and was limited by the rf generator. In the second part of the project, the general potential of high frequency discharge excitation in the 100 kHz range has been investigated. A discharge test stand was developed consisting of a discharge chamber, a closed-loop gas ciruclation system and a transistorised switched mode power supply. A maximum input power of 16.5 W/cm"3 was achieved. It has been shown that this excitation method may have several advantages compared with the conventional dc excitation and rf excitation. (orig.)SIGLEAvailable from TIB Hannover: F99B610+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Diodengepumpte Festkoerperlaser hoher Brillanz. Teilvorhaben: Untersuchung von Scheibenlasern im Hochleistungsbereich Abschlussbericht

SIGLEAvailable from TIB Hannover: F02B693 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung, Berlin (Germany)DEGerman

EUROLASER CHOCLAB - instruments and standard test procedures for laser beam and optics characterization. Untersuchungen zum Aufbau eines Systems zur Online-Messung der Strahllagestabilitaet von Laserstrahlquellen Abschlussbericht

Available from TIB Hannover: F99B1061+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany); European Union (Euro), Brussels (Belgium)DEGerman

Analyse neuartiger Kristallstrukturen unter dem Einfluss hoher spektraler Leistungsdichten. Teilvorhaben: Grundlegende Untersuchungen zum Pumpen mit fasergekoppelten Diodenlasern und Erforschung eines Hochleistungslasers Abschlussbericht

SIGLEAvailable from TIB Hannover: F98B883+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Grundlegende Untersuchungen zum Rohrlaser und grundlegende Messverfahren zur Qualifizierung sehr grosser Laserkristalle Abschlussbericht

1. More than 1.5 kW laser output power can be produced out of one single pumping chamber using an annular Nd:YAG rod as an active medium. Temperature and stress behaviour, output power, efficiency and beam quality were investigated at an outside pumped tube laser. The incoupling of the tube laser beam into the core of a 1 mm fiber could be shown. In comparison to multi rod laser systems the beam quality of the tube laser is inferior. All other beam parameters are of equal rank. 2. For the realisation of high power solid state lasers laser crystals are of major concern. To inspect the quality of those crystals a measurement technique was developed and tested to determine the transversal doping concentration. The doping distribution of up to 250 mm long Nd:YAG laser rods were measured. In addition the laser-active parameters of the laser crystals were investigated. The tested laser rods showed a very good quality. (orig.)SIGLEAvailable from TIB Hannover: F95B2376+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany); European Union (Euro), Brussels (Belgium)DEGerman

Eurolaser Definitionsphase. CO -Laser mit Ausgangsleistungen von 10 bis 100 kW Resonatorkonzepte

SIGLETIB Hannover: FR 2415+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman