AbstractAn energy measurement system in a Large-aperture high power laser experiment platform
is introduced. The entire measurement system includes five calorimeters, which carry
out the energy measurement of the fundamental frequency before the frequency
conversion unit, remaining fundamental frequency, remain second-harmonics, third
harmonics, as well as the energy balance measurement after the frequency conversion
unit. Combinational indirect calibration and direct calibration are employed to
calibrate the sampling coefficients of the calorimeters. The analysis of the data
showed that, regarding the energy balance coefficients, combinational calibration
approach gives a higher precision, and leads to an energy balance with 1%; and
regarding the energy sampling coefficients for the various wavelengths after the
frequency conversion, the results from direct and combinational calibration are
consistent. The uncertainties for all energy sampling coefficients are within 3%,
which guarantees the reliability of the energy measurement for the laser
facility.
Energy measurement system of a large-aperture high power laser experiment
platform