Picosecond laser is a laser produced by a picosecond laser.
Now diode pumped Nd: YAG or Nd: YLF lasers using acoustooptic modulation mode locking have become the standard light source for picosecond pulse generation. Since the energy of each pulse output from the oscillator is quite low, regenerative amplifiers are often required to amplify it. In commercially available lasers, the resonator is usually folded several times to shorten the total length of the system. In order to obtain short pulses, it is necessary to have a short resonant cavity and a high modulation frequency, and separate the single pulse with a Pockels box. The length of the cavity is a compromise between these two requirements.
Picosecond ultrashort pulse laser has the characteristics of picosecond ultrashort pulse width, adjustable repetition rate, high pulse energy, etc. In material processing, it has the following features: no hot melting zone, "cold" processing can be realized; High precision, precision up to micrometer level; Extensive machinable materials can be used for surface processing and internal processing of transparent materials; It can process super hard, fragile, high melting point, explosive materials and other advantages.
Therefore, it has brought revolutionary progress to laser material processing. With the continuous development of laser technology and its applications, commercially available stable picosecond lasers have been widely used in various aspects of industrial fields. This paper introduces the application of picosecond pulse laser micromachining technology in the industrial field, and studies the picosecond laser processing of PCB, glass, metal, ceramics and other materials.