Abstract
For optical sensing, an annular beam is widely used because of its ability to self-transform into a nondiffractive
beam when it propagates in air. This ability, however, is difficult when it propagates in
random media because of scattering. To analyze the characteristics of annular beam propagation in
random media, we proposed a new wavefront analysis method based on geometric optics approximation.
In this algorithm, we adopted a simplified geometric optics approximation and iterative calculation based
on forward scattering and simulated the attenuation and the scattering waveform of the annular beam in
random media. By this simulation, we got a non-diffractive beam waveform at the optical axis with a
certain propagation distance and media concentrations. The numerical analysis results were compared
with the experimental results.
