A method of reconstructing positive and negative images from Fourier holograms recorded without the dc components is demonstrated by use of a coaxial holographic storage system. Reconstructed images are obtained by adding a phase-modulated dc component of the signal beam on reading. Contrast reversal of the reconstructed images can be achieved by reversing the readout reference pattern. This method can realize not only optical noise reduction but also less consumption of the dynamic range of the recording medium, potentially contributing to increasing the number of multiplexed holograms.
© 2006 Optical Society of America
Optical Data Storage
Original Manuscript: August 7, 2006
Revised Manuscript: October 10, 2006
Manuscript Accepted: October 13, 2006
Published: December 23, 2006
Shin Yasuda, Jiro Minabe, and Katsunori Kawano, "Optical noise reduction for dc-removed coaxial holographic data storage," Opt. Lett. 32, 160-162 (2007)