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Deladurantaye and others published materal micromachining using bursts of high repetition rate picosecond pulses from a fiber laser source find read and cite all the. Circle laser beam hatch feed direction 30 overlapp.

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Picosecond laser micromachining produces high quality results.

Micromachining with picosecond laser pulses. Laser pulses with durations of just a few picoseconds create peak intensities so high that non linearmultiphoton absorption takes place resulting in an ultra precise cold process with very small heat affect making them ideal for applications in micromachining surface structuring thin film ablation thin foil or polymer cutting dark marking of metals and processing of brittle or. Lasers are powerful tools for micromachining applications. Ultrashort pulse laser method could improve industrial laser processing. In the pulsed mode the laser output is concentrated in small pulses. Pulsed mode laser devices provide pulses with sufficient energy for micromachining a given material and small pulse durations. The optimum number of pulses required to most effectively mark or cut transparent dielectrics with a preset speed of movement of the sample depends on material and the lasers wavelength and pulse duration. Picosecond laser micromachining of tungsten carbide. Pdf on jan 1 2011 p. Picosecond pulses providing the non thermal mechanisms of ablating also can be used for resecting tissue. Lasers are powerful tools for micromachining applications. Messe micromachiningwithpicosecond lasers lumera laser bk190410 14 applications examples. Hyperrapid nxt is a high power picosecond laser that implements coherents pulseeq technology to enable micromachining with increased precision and reduced heat affected zone haz. The small pulse duration minimizes heat flow to surrounding materialthe length of the laser pulse can vary from milliseconds to femtoseconds. This causes the material removal to become less effective and can also cause laser scattering and debris formation. Picosecond and femtosecond pulsed lasers are available in infrared up to 10 w at 15 m m up to 100 w at 106 m m or as a second harmonic source up to 5 w at 052 m m.

Material micromachining using bu rsts of high repetition rate picosecond pulses from a fiber laser source pascal deladurantaye alain cour noyer mathieu drolet louis desbiens dany lemieux martin. For some models the pulse duration can be adjusted by the user. Micromachining with picosecond laser pulses. Femto pulse lasers range from 400 to 600 fs pico pulse models range from 10 ps to 1 ns. One is the interaction of the laser pulse with the debris plume from the prior pulse sometimes referred to as plasma shielding. A focused laser beam can easily be concentrated onto a target of a few microns in diameter or a laser illuminated mask can be imaged onto the work piece with a high. Laser pulses on 1.