Well, my understanding of spoken english is not as good as for written english, but for what I have understood, they don't actualy follow a photon, but simulate it's path by slightly moving the mirror between each light pulse of the laser... if it is actually that, I don't see the real purpose of this experiment. It involves much sophisticated harware for nothing new...
Maybe I have not understood...

French Blender user - CPU : intel Quad QX9650 at 3GHz - 8GB of RAM - Windows 7 Pro 64 bits. Display GPU : GeForce GTX 480 (2 Samsung 2443BW-1920x1600 monitors). External GPUs : two EVGA GTX 580 3GB in a Cubix GPU-Xpander Pro 2. NVidia Driver : 368.22.