1. You need a Laser 1064nm wavelength.
2. Power requirements about 200vdc@400Amps
energy is pulsed at about 1Hz to 2 Hz rate.
3. In addition you need a simmer voltage about 1KV to simmer
the laser before firing.
4. Detectors to measure the energy being delivered.
5. A fiber optic delivery system.
6. A hand piece that cools the skin to about 2 degrees C,
else you'll burn the area of treatment severly.
A power supply delivering 800 joules of energy is lethal!
This project is not something a novice wants to undertake
unless you have loads of Life Insurance. Trust me I designed them!