Full plans, schematics and source code are available here...
Looks like Jarre’s currently playing throughout Europe as the start of his world tour.
Initial pictures indicate that he’s dropped the “keyboard” style laser harp and gone back to a vertical orientation. That means the power has to be cranked up again, and it’s back on with the oven gloves.
Looks like he might have lost a string too…
Don’t know about the power of that laser, but I would assume it’s a single scanning beam, of 1W+ maybe even 2W.