I just received a Coherent 808nm Laser Diode 3.5V 60-90Amp 50-60W:
Freaking awesome. High power cutting laser. I’ve always wanted one of these. This is powerful enough to cut just about anything except metal.
I’m going to turn this into a cutting head for the reprap.
You can see the electrical power connects, and the water cooling connectors.
This laser is dangerous:
THERE ARE NO “OOPS THAT WAS BRIGHT” SECOND CHANCES WITH THIS LASER! A single careless glance into the beam or it’s reflection WILL PERMANENTLY BLIND YOU FOREVER! To the eye the scattered output looks as bright as a red laser pointer, but that same “weak looking” beam will light a piece of cardboard on fire in about 1/4 of a second!
Protective eyewear is mandatory. I’ll provide a full safety rundown prior to firing it for the first time.
Prometheus Fusion Perfection 
Whoa.
I hope you are planning to optically enclose the work area somehow.
Please wear the proper laser safety goggles when operating these diodes. You need to make sure you choose the right goggle with the right type of filter for the wavelength you are using. You also need to make sure the set-up is safe from an unexpected visitor walking in and being exposed. Let me know if you need any help or advice. I operate these types of devices regularly.
http://www.lasersafety.com/category.cfm?market=5&catid=1