Rate-4/5 4-ary modulation code for 4-level holographic data storage systems

Modulation coding for pixel-matched holographic data storage.

We describe a digital holographic storage system for the study of noise sources and the evaluation of modulation and error-correction codes. A precision zoom lens and Fourier transform optics provide pixel-to-pixel matching between any input spatial light modulator and output CCD array over magnifications from 0.8 to 3. Holograms are angle multiplexed in LiNbO(3):Fe by use of the 90 degrees geo...

High-density recording in holographic data storage system by dual 2-level run-length-limited modulation

Holographic Data Storage

Introduction With its omnipresent computers, all connected via the Internet, the Information Age has led to an explosion of information available to users. The decreasing cost of storing data, and the increasing storage capacities of the same small device footprint, have been key enablers of this revolution. While current storage needs are being met, storage technologies must continue to improv...

Compact Holographic Data Storage

Introduction: NASA’s future missions would require massive high-speed onboard data storage capability to Space Science missions. For Space Science, such as the Europa Lander mission, the onboard data storage requirements would be focused on maximizing the spacecraft’s ability to survive fault conditions (i.e. no loss in stored science data when spacecraft enters the “safe mode”) and autonomousl...

ACELL Apr. 45/4

Wright, Carola E., F. Haddad, A. X. Qin, P. W. Bodell, and K. M. Baldwin. In vivo regulation of b-MHC gene in rodent heart: role of T3 and evidence for an upstream enhancer. Am. J. Physiol. 276 (Cell Physiol. 45): C883–C891, 1999.—Cardiac b-myosin heavy chain (b-MHC) gene expression is mainly regulated through transcriptional processes. Although these results are based primarily on in vitro cel...