Performance of multilevel error correction in binary holographic memory
Jay C. Hanan, Tien‐Hsin Chao, George F. Reyes · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2004
At the Optical Computing Lab in the Jet Propulsion Laboratory (JPL) a binary holographic data storage system was designed and tested with methods of recording and retrieving the binary information. Levels of error correction were introduced to the system including pixel averaging, thresholding, and parity checks. Errors were artificially introduced into the binary holographic data storage system and were monitored as a function of the defect area fraction, which showed a strong influence on data integrity. Average area fractions exceeding one quarter of the bit area caused unrecoverable errors. Efficient use of the available data density was discussed.