Although Professor Bloembergen used the old-fashioned projector, he delivered a wonderful talk on the early history of the nonlinear optics.
He started by saying that Ruby laser is nonlinear optics. Therefore, we should celebrate the birth of nonlinear optics 1 year earlier, together with the laserfest.
Applause continued for a long time after his talk.
Thanks to Andy Kung for providing me these pictures.
