A broad range of passive Q-switched microlasers:

These are diode pumped solid state lasers that are distinctive for their subnanosecond pulses, repetition rates in the tens of kilohertz, and compact packages.

Microlasers are available at near infrared, green, and ultraviolet frequencies, at energy levels in the range of microJoules to tens of microJoules.

You can also visit detailed page for  :
Microchips,
Powerchips,
Ion-Exchange circuits.