Xianmiao Xu

Abstract High-density storage of big data in the information age calls for higher data transmission rates. Holographic data storage technology, based on the principles of three-dimensional volume holographic recording and two-dimensional planar transmission, delivers an extremely high data transmission rate.

The performance of page-oriented holographic data storage systems, especially capacity, transmission speed, and symbol error rate, critically depends on the modulation code design. Under the constraint of maintaining approximately 20% code weight, this paper proposes an optimized 5:22 two-dimensional equal-weight sparse modulation code featuring elongated code block geometry.

Polarization holography offers a distinctive advantage by enabling simultaneous control over light waves’ amplitude, polarization, and phase. Within the tensor polarization holography theory framework, coefficients A and B, representing the scalar and tensor components of photoinduced changes in the dielectric tensor, respectively, play a pivotal role in manipulating the reconstruction wave. Accurate measurement and control of A/B are essential for achieving specific functionalities.