An optimized Gerchberg–Saxton algorithm for speckle suppression with double amplitude freedom

Kexuan Liu; Zehao He; Liangcai Cao

doi:10.1117/12.2642059

20 December 2022 An optimized Gerchberg–Saxton algorithm for speckle suppression with double amplitude freedom

Kexuan Liu, Zehao He, Liangcai Cao

Proceedings Volume 12318, Holography, Diffractive Optics, and Applications XII; 1231815 (2022) https://doi.org/10.1117/12.2642059
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

The Gerchberg–Saxton (GS) algorithm is a widely employed algorithm for phase-only hologram (POH) generation. However, the POHs which can strictly satisfy the amplitude constraints on the object and the holographic plane may not exist or be obtained, resulting in speckle noise and reduction of the reconstruction quality. Relaxing the amplitude constraint during the iterations is an effective method to solve the above problem. In this work, a GS-double amplitude freedom (GS-DAF) algorithm is proposed. The amplitude constraint relaxation is realized by both the combined amplitude constraint and the support constraint. The spherical initial phase and oversampling method are applied to further improve the optical reconstruction quality of the GS-DAF algorithm. An enhanced reconstruction quality with less speckle noise has been achieved.

Conference Presentation

Citation Download Citation

Kexuan Liu, Zehao He, and Liangcai Cao "An optimized Gerchberg–Saxton algorithm for speckle suppression with double amplitude freedom", Proc. SPIE 12318, Holography, Diffractive Optics, and Applications XII, 1231815 (20 December 2022); https://doi.org/10.1117/12.2642059

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