Micromachining using ultrashort pulses from a laser oscillator
Oscillator-only micromachining in action. A train of femtosecond pulses from a laser oscillator is focused by a microscope objective into a thin glass sample. The bright blue spark is due to recombination of the
electrons that are nonlinearly ionized by the pulses. Permanent structural changes are produced
in the material at the laser focus.
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