Spherical divergence decreases energy with the square of the distance.
球面扩散使波的能量与传播距离的平方成反比。
2
The operating distance of a laser radar system is determined on pulse energy, pulse width, beam divergence angular, atmosphere attenuation, target reflection, receiver sensitivity and so on.
The result indicates that the single pulse energy and the Angle of divergence of output laser decrease, but the pulse width of output laser increases with the increase of the OPO cavity length.