A Power Measuring Device for Pulsed Lasers.
DEPARTMENT OF THE ARMY WASHINGTON DC
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There is a problem in measuring the power output of laser beams. For example, a highly intense laser beam may over saturate and destroy known energy detectors and power meters with the exception of large heat sink spherical calorimeters which totally blocks the beam. When the beam energy was spread over a large area, the ratio of the area of the beam to the detector area was so large that accurate and reliable power measurements could not be made due to inhomogeneities in the beam. The device of the present invention accurately and reliably measures the beam power without blocking the beam. The apparatus for measuring the power of a laser beam includes an open ended tube through which the beam passes to expand air or gases in the tube. A pressure transducer is connected to the tube to give an indication of the pressure of the expanded air or gases in the tube.
- Test Facilities, Equipment and Methods