WOITTENNEK, FRANZISKA,WOELFEL, MATHIAS,VOGLER, KLAUS,KITTELMANN, OLAF
申请号：
CA2774879
公开号：
CA2774879C
申请日:
2009.11.18
申请国别(地区):
CA
年份:
2015
代理人:
摘要：
A laser-assisted material-machining device comprises a laser (14) forproviding apulsed laser beam (16), a measuring arrangement (30, 32, 34, 36, 38) in ordertoobtain measured values of a fundamental-wave power of the laser beam and alsoofa power of at least one higher harmonic generated from the laser beam byfrequency multiplication, and an evaluating unit (22) connected to themeasuringarrangement, which has been set up to examine the quality of the laser beam(16)in a manner depending on the measured fundamental-wave power, on themeasured power of the higher harmonic, and on a set radiant power of the laser(14). By formation of the quotient of the measured fundamental-wave power andof the measured power of the higher harmonic, the current conversionefficiency ofthe frequency multiplication can be ascertained. Said conversion efficiency isameasure of the quality of the wavefront and of the pulse duration of the laserbeam(16).
