A technique for reconstructing positive and negative images from an identical intensity-modulated hologram is demonstrated theoretically and experimentally by use of a coaxial holographic storage system. Negative images are obtained by adding a phase-modulated dc component of signal beam on reading. By comparing positive and negative images, the bit error rate (BER) is improved by two orders of magnitude. This technique can reduce optical noise of reconstructed images to attain low BERs.
© 2006 Optical Society of America
Original Manuscript: January 26, 2006
Revised Manuscript: March 9, 2006
Manuscript Accepted: March 9, 2006
Shin Yasuda, Yasuhiro Ogasawara, Jiro Minabe, Katsunori Kawano, Makoto Furuki, Kazuhiro Hayashi, Koichi Haga, and Hisae Yoshizawa, "Optical noise reduction by reconstructing positive and negative images from Fourier holograms in coaxial holographic storage systems," Opt. Lett. 31, 1639-1641 (2006)