Conventional photodetectors typically are used to provide a signal proportional to the power of an incident beam of light. In recent years, a new photodetector has been developed based on the nonsteady-state photo-electromotive force (photo-emf).1,2 Exciting advances in the field and a real-time demonstration of the detector technology, as applied to laser ultrasonic inspection, were offered as part of CLEO 2000 (San Francisco, CA).