Picosecond laser is a laser with a pulse width of picosecond. With the characteristics of picosecond ultra-short pulse width, adjustable repetition frequency, high pulse energy, etc., it has become more and more widely used in biomedicine, optical parametric oscillation, biological microscopic imaging and other fields, and has gradually become a modern biological imaging and analysis system An increasingly important tool in China. A laser with a pulse width of picosecond, referred to as a picosecond laser.
Now diode-pumped Nd:YAG or Nd:YLF lasers using acousto-optic modulation mode-locking are already standard light sources for generating picosecond pulses. Since the energy of each pulse output from the oscillator is quite low, a regenerative amplifier is often required to amplify it. In commercially available lasers, the resonant cavity is generally folded several times to shorten the total length of the system. To obtain short pulses, a short resonant cavity and a high modulation frequency are required, and a single pulse needs to be separated by a Pauls box. The length of the cavity is the compromise result of these two requirements.