Haouat Mohamed, Garcia-Sucerquia Jorge, Kellou Abdelhamid, Picart Pascal
Opt Lett. 2017 Mar 15;42(6):1047-1050. doi: 10.1364/OL.42.001047.
This Letter presents an easy, fast, and efficient single-shot method to reduce speckle noise in digital Fresnel holography. In this method, several images from a single hologram are reconstructed by introducing spatial displacements in the Fresnel kernel. Spatial jitters produce images with different speckle positions. Averaging the set of numerically produced images leads to a strong reduction of speckle noise in both amplitude and phase difference images. The experimental results show the suitability of the proposed approach and confirm its applicability to digital holographic interferometry.
