An improved polarization recording approach to reduce speckle noise in digital holography is proposed. Multiple off-axis holograms are obtained by rotating the linear polarization state of both illumination and reference wave simultaneously. By averaging the intensity fields, the speckle noise in the reconstructed images is well suppressed. Statistical evaluation of the experimental results shows the effectiveness and improvement of the proposed method.
© 2011 Chinese Optics Letters
(030.6140) Coherence and statistical optics : Speckle
(110.6150) Imaging systems : Speckle imaging
(090.1995) Holography : Digital holography
(070.7345) Fourier optics and signal processing : Wave propagation
Wen Xiao, Jing Zhang, Lu Rong, Feng Pan, Shuo Liu, Fanjing Wang, and Aga He, "Improvement of speckle noise suppression in digital holography by rotating linear polarization state," Chin. Opt. Lett. 9, 060901- (2011)