Study on the Difference of Wavefront Distortion on Beams Caused by Wavelength Differences in Weak Turbulence Region

In dual-wavelength free-space optical communication systems, the wavefront distortion differences caused by wavelength difference of signal and beacon lights cannot be completely corrected. this study, according to method geometric optics, relationship between phases is analyzed establishing a mathematical model cross-correlation ratio arrival-angle fluctuation phase different Gaussian-beam wavelengths under weak turbulence near surface. The numerical results show that after Gaussian beams propagate through same atmospheric channel, number decreases with an increase in difference, waist radius, intensity, increases propagation distance. beam-wavefront increasing difference. Finally, correction experiment adaptive system verified correctness phase-difference light established study.