Abstract: The single event effect experiment using pulsed laser enjoys many merits, such as convenient operation, efficient process, and the capability of obtaining the spatial and time response of the subject device. By using the Pulsed Laser Single Event Effects (PLSEE) facility developed by our center, experiments of single event effects for different devices and circuits were conducted. For digital devices and circuits aboard a certain satellite, various single event phenomena were observed, especially, the multi single event latch-ups were observed for the first time, together with their influence on device and circuit. The facility is also used to determine whether some amplifiers and optocouplers can be used in space. It is shown that the single event transient effects exist in analog and photoelectronic devices just as in digital devices, and are more difficult to be captured and positioned, with more serious hazards on the satellite system.