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POLARISATION OPTICAL COMBINATION OF PULSED LASER DIODES WITH A TIME-OFFSET FOR IMPROVING THE PERFORMANCE OF A LASER BEAM
POLARISATION OPTICAL COMBINATION OF PULSED LASER DIODES WITH A TIME-OFFSET FOR IMPROVING THE PERFORMANCE OF A LASER BEAM
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机译:具有时间偏移的脉冲激光二极管的极化光学组合,可提高激光束的性能
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摘要
The invention relates to a method and a device for producing a laser beam of high brilliance, using laser diodes as the laser source, in particular for machining materials. The invention is characterised in that the laser diodes are operated in a pulsed mode and the individual pulses are recombined in a beam recombiner. In a preferred embodiment, 2n+1 laser diodes (1, 2, ... 16) are operated in a pulsed mode, two respective laser diodes with a different polarisation are activated simultaneously and the individual pulses are recombined in a beam recombiner, consisting of a cascade of polarisation-selective optical elements (PS4, PS3, ... PS1), arranged successively in n + 1 stages in the beam path and respective switchable polarisation rotators (PD3, PD2, PD1), located between said stages.
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