Analysis on recovery effect of high frequency phase of laser beam with wavefront distortion

The high frequency phase of near-field distorted wavefront is recovered using the successive iteration method. The variation of the recovery effect with the filter cutoff frequency is quantitatively analyzed. The influences of the noise disturbance of near-field and far-field intensities on the recovery effect are discussed. The results show that, with the increasing of the filter cutoff frequency, that is, with the increasing of the measurement requirement for the wavefront phase detector, the recovery effect of high frequency phase by using successive iteration method will be better. In addition, the recovery effect of high frequency phase becomes worse with the increasing of the noise disturbance of near-field or far-field intensity. Specifically, the influence of the noise disturbance of near-field intensity on the recovery effect is relatively small, whereas that of the noise disturbance of far-field intensity is more significant. In practical applications, in order to achieve better recovery effect of the near-field high frequency phase, the demand on the low-frequency phase measurement in near field should be required reasonably, and the measurement errors of the intensity distributions must be as low as possible, especially the influence of far-field noise disturbance should be small enough.