Phase reconstruction of two interfering fields using a lenslet array and an optimization method

Abstract

In this paper, a lenslet array is applied to simultaneously reconstruct the unknown phases of two interfering fields from intensity data. Recorded intensity patterns at the lenslet array plane and at the focal plane of the lenslet array are used in the stochastic parallel gradient descent algorithm for reconstruction. The lenslet array assures a fast-convergence and non-stagnating phase retrieval. Numerical simulations are presented to validate the proposed method. The obtained results show that the method permits a robust and accurate phase reconstruction and exhibits a high immunity to noise. © 2019 IOP Publishing Ltd.