A nonlinear OPC technique for laser beam control in turbulent atmosphere
2013
A viable beam control technique is critical for effective laser beam transmission through turbulent atmosphere. Most
of the established approaches require information on the impact of perturbations on wavefront propagated waves.
Such information can be acquired by measuring the characteristics of the target-scattered light arriving from a small,
preferably diffraction-limited, beacon. This paper discusses an innovative beam control approach that can support
formation of a tight laser beacon in deep turbulence conditions. The technique employs Brillouin enhanced fourwave
mixing (BEFWM) to generate a localized beacon spot on a remote image-resolved target. Formation of the
tight beacon doesn’t require a wavefront sensor, AO system, or predictive feedback algorithm. Unlike conventional
adaptive optics methods which allow wavefront conjugation, the proposed total field conjugation technique is
critical for beam control in the presence of strong turbulence and can be achieved by using this non-linear BEFWM
technique. The phase information retrieved from the established beacon beam can then be used in conjunction with
an AO system to propagate laser beams in deep turbulence.
Keywords:
- Correction
- Cite
- Save
- Machine Reading By IdeaReader
0
References
0
Citations
NaN
KQI