Laser Power and Energy Measurements

Download or read book Laser Power and Energy Measurements written by United States. National Bureau of Standards and published by . This book was released on 1969 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calorimeters for measuring the output energy of pulsed ruby and neodymium glass lasers have been built and calibrated.The absorbing medium is an aqueous solution of CuSO4. Calibration of *laser energy detectors has an estimated uncertainty of plus or minus 2% for input energies of 0.1J to 100J.Instrumentation is described that is used for the calibration of cw laser power meters.The calibration unit employs an absorption cell calorimeter to calibrate the output of a photovoltaic cell transfer detector.The calibrations are within an accuracy of 4%.A discussion and description is also given of several types of calorimeters that have been used to measure the output of a 100 watt CO2 laser.The most recent design provides for measurement from 1 watt to 5 kilowatts with a measured accuracy of better than 3%.(Author).