Study of ideal phase compensation for an atmospheric thermal blooming effect in the upward transmission of high-energy lasers.

Atmospheric thermal blooming (TB) effect is a critical nonlinear phenomenon affecting the transmission of high energy lasers. Adaptive optics (AO) technology partially reduces the impact of TB. However, phase compensation instability (PCI) is induced by correction errors, significantly constraining the effectiveness of AO. Based on the laser simulation software Easy-Laser, this paper explores the limits of ideal phase compensation, which ignores the correction errors of AO. The results demonstrate that ideal phase compensation improves correction compared to traditional AO. However, PCI still occurs, actually induced by the coupling of beam diffraction and the positive feedback of phase compensation. Based on this new understanding, we exploratorily apply mean filtering to TB correction and achieve satisfactory correction results. This demonstrates that removing high-frequency phase fluctuations is more effective in TB correction.