Fu Fuxing, Zhang Bin. Recovery of High Frequency Phase of Laser Beam with Wavefront Distortion[J]. Chinese Journal of Lasers, 2011, 38(4): 402009
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The model of laser beam with distorted wavefront has been given, where the root-mean-square (RMS) gradient and the random phase perturbation have been introduced to describe the low and the high frequency phase distortions, respectively. According to the known low frequency phase in near-field, the intensity distribution in near-field and the intensity distribution in far-field, the successive iteration method has been proposed to recover the high frequency phase in near-field, and the recovery effect of high frequency phase has been analyzed quantitatively in the terms of the residual error, peak-valley (PV) value, RMS and power spectral density (PSD) of the wavefront. In addition, the adaptability of the retrieval method has been convinced by recovering different distorted wavefronts. The results show that the high frequency phase of distorted wavefront can be recovered effectively by using the successive iteration method, and the wavefront distortion including the low and the high frequency phases can be readily obtained. Furthermore, the successive iteration method is valid to recover different distorted wavefronts.