Laser
profile analyzer is adopted to test laser transverse mode energy
distribution. One-dimensional, two-dimensional and three
dimensional energy distribution will be shown on the software,
as well as laser transverse mode characteristics of spot
diameter, divergence, ellipticity and etc.
The software can provide four calculating method
testing results of laser spot diameter, widely
used definition method is 13.5% of peak value as the boundary
(1/e2), and the beam ellipticity definition is the ratio of 4 Sigma
spot diameter on minimum direction and 4 Sigma spot diameter on
maximum direction.
Laser divergence is a physical parameter to
describe laser divergence degree, the testing method is roughly
summed up as testing beam spot diameter both on near field and
far field, by calculating the distance between the two spot
diameter deviation of the two position of tangent value, which
can determine the divergence angle value, then converted into
space angle value. |
