The influence of high-frequency phase and correction distance on the phase correction effect

Abstract

By studying the propagation characteristics of the wavefront phase of laser beams in adaptive optics systems, the influence of the high-frequency phase on the correction effect has been analyzed and the variations of correction effect with the position of optical deformable mirror have been analyzed quantitatively. The results show that the beam quality of the corrected beam in far field obviously degrades with an increase of high-frequency phase in a distorted wavefront, and the correction effect becomes worse and worse. In addition, the correction effect is related to the position of the deformable mirror; with an increase of the distance between the deformable mirror and the output mirror of the laser the correction effect is better. For a deformable mirror with a given unit size, when the distance of correction is more than 20 m the correction effect is perfect.

Improving the performance of a laser-driven flyer with a diffractive optical element of high wavefront distortion tolerance

“…Here, we discuss the wavefront distortion tolerance of our designed DOE. We used a wavefront distortion model [31][32][33][34] to construct different distortion phases for the input beam in order to simulate the possible wavefront distortion during actual use. In the simulation, five types of wavefront distortion ranges are constructed, including 0 ∼ λ/4, 0 ∼ λ/2, 0 ∼ λ, 0 ∼ 2λ, 0 ∼ 3λ.…”