A passive Q-switch is a device that uses the phenomenon that the transmittance of optical materials at a certain laser wavelength depends on the laser intensity to realize Q-switching. The laser cryolinker mainly produces saturated absorption crystals in passively Q-switched crystals. The absorption coefficient of saturated absorption crystal decreases with the increase of incident light intensity. When the saturation value is reached, the loss (Q value) in the laser cavity is modulated and a pulse is emitted. The order of pulse width is a few nanoseconds or even tens of picoseconds.
Passivel Q-switched crystal
