Accession Number : ADA018207

Title :   Laser Power and Energy Measurements.

Descriptive Note : Technical note,

Corporate Author : NATIONAL BUREAU OF STANDARDS BOULDER COLO INST FOR BASIC STANDARDS

Personal Author(s) : Jennings,D. A. ; West,E. D. ; Evenson,K. M. ; Rasmussen,A. L. ; Simmons,W. R.

Report Date : OCT 1969

Pagination or Media Count : 71

Abstract : 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. Calbration of laser energy detectors has an estimated uncertainty of plus or minus 2% for input energies of 0.1J to 100J. Comparisons of absorption cell calorimeters with metal plate calorimeters agree within 1%. 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 power meter to be calibrated is then compared to the calibrated output of the transfer detector.

Descriptors :   *Laser beams, *Calorimeters, *Power meters, Measuring instruments, Ruby lasers, Infrared lasers, Continuous wave lasers, Calibration, Neodymium lasers, Instrumentation, Absorption(Physical)

Subject Categories : Lasers and Masers
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE