Anyone know what this laser is

I've no idea what the laser is, but the optical loses are going to be shocking, purely down to the use of that case shape, and the need to use all those steering mirrors to get the beam on the galvo mirrors!
It is an RGB,and if we could see the labels on the modules, I would hazard a guess that one of them is 473nm (potentially the one on the left of the bottom picture. 532nm (green) is likely the middle one, and the big one on the right the red (probably a big array of low power, long wavelength (658??) red diodes polarized and combined through the PBS cube.

There'll be a ower deck with all of the drivers on it, which may give away a bit more about brand of scanners and lasers modules.

If you look at it, if they'd moved the 2 left most modules up against the right hand one, they could've used a straight line of dichros right onto the steering mirror before the galvos.

It says class 3b on the sticker, which would mean that it is up to 500mW total power. However, I've seen multi-watt lasers with class 3b stickers on them...

If the 473nm head is 100mW or more, it probably cost quite a bit of money to put together when it was built.

Looks like a Laser Electronics Stealth Laser.

Used to have 2 in the Opera House.

http://www.laserelectronicsltd.com/index.htm