… We present an experimental study of coherent collisions between one-dimensional bright
photorefractive screening solitons in a bulk strontium barium niobate crystal. … For in-phase
collision, we find that the solitons fuse to a joint solution of the same or a broader width,
which can be predicted from the soliton existence curve. … In conclusion, we have reported
what is believed to be the first experimental observation of coherent collisions between
photorefractive solitons. …