Optical fiber fault detector

摘要: A control apparatus for a pumped rod-type laser includes an arc lamp disposed to illuminate the lasing medium, such as NdYAG crystalline rod. The full wave rectifier power lamp, and MOSFET switching circuit turn on off at controlled times during each half cycle of waveform so that medium is optically discharged once supply. output measured by photodetector cycle, integrated compared with manually set, variable level. When actual reaches preset level, comparator initiates turning respective waveform. also safety circuits permit operation only when internal cooling system operating, current below maximum temperature created illumination target like. further detects presence radiation in area surrounding shut it light escapes from system. For medical uses, this feature obviates need goggles operational personnel.