Title :
Fast drilling of high accuracy micro holes in stainless steel with DPSS laser
Author :
Mehlmann, C. ; Govorkov, S. ; Slohodtchikov, E. ; Wiessner, A. ; Basting, D.
Author_Institution :
Lambda Phys. GmbH, Gottingen, Germany
Abstract :
Summary form only given. Investigating the ablation rate of steel using a diode pumped Q-switched Nd:YAG laser at a repetition rate of 10 kHz we could demonstrate ablation rates up to more than 10 mm per second for 1.5 mm thick steel samples. Using 15 nsec laser pulses the threshold for fast material removal in thin foils was found to be 10 J/cm/sup 2/. Drilling through thicker materials the absorption of laser light in the plasma generated becomes more important, leading to higher energy thresholds.
Keywords :
foils; laser ablation; laser beam machining; stainless steel; 10 kHz; 15 ns; Q-switched Nd:YAG laser; YAG:Nd; YAl5O12:Nd; ablation rate; diode pumped solid-state laser; energy threshold; foil; hole drilling; light absorption; plasma generation; repetition rate; stainless steel; Absorption; Diodes; Drilling; Laser ablation; Laser excitation; Optical materials; Optical pulses; Plasma materials processing; Pump lasers; Steel;
Conference_Titel :
Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on
Conference_Location :
Nice
Print_ISBN :
0-7803-6319-1
DOI :
10.1109/CLEOE.2000.909967
