Abstract
Methods of measuring the energy and power of a Q-switched neodymium glass laser in the range 10 −3−1 J and 10 4–10 8 W are described. Calorimetric devices using discs, cones and wire were constructed for energy measurements and are discussed with respect to construction, materials and calibration. Power measuring systems using vacuum and silicon photodiodes are also described. Of the five detectors investigated the wire calorimeter and silicon photodiode systems were developed and an experiment in which the two detectors were used simultaneously to measure the laser output showed good agreement between the results.
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