Investigation and evaluation of cuneiform prism and neutral glass slices used as laser attenuator
The theories of cuneiform prism and series neutral glass slices used as laser attenuator are analyzed in this paper.An aberration-free laser quantitative attenuator made of cuneiform prism is adopted and a series of neutral attenuated slices are used for adjusting laser-beam enegy at the same time.The M~2-factor of the Hermite-Gaussian beams generated by an LD-pumped mode master is measured and it has been verified that the cuneiform prism used as reflection laser attenuator of 4.3% 0θ_i55° has no distinct influence on the beam quality and the neutral glass slices have accurate adjusted the operation for laser beam energy.More powerful attenuator can be obtained by using the combination of multi-cuneiform prism.The precision control of the laser beam power was realized with neutral glass slices for CCD dynamic detecting range.This conclusion is a guidance significant for developing laser beam parameters measurement system.