From Event: SPIE Optical Engineering + Applications, 2017
The cavity supports the orthogonal reference beam families as its eigenmodes while enhancing the reference beam power. Such orthogonal eigenmodes are used as additional degree of freedom to multiplex data pages, consequently increase storage densities for volume Holographic Data Storage Systems (HDSS) when the maximum number of multiplexed data page is limited by geometrical factor. Image bearing holograms are multiplexed by orthogonal phase code multiplexing via Hermite-Gaussian eigenmodes in a Fe:LiNbO3 medium with a 532 nm laser at multiple Bragg angles by using Liquid Crystal on Silicon (LCOS) spatial light modulators (SLMs) in reference arms. Total of nine holograms are recorded with three angular and three eigenmode.
Guanghao Chen, Bo E. Miller, and Yuzuru Takashima, "Eigenmode multiplexing with SLM for volume holographic data storage," Proc. SPIE 10384, Optical Data Storage 2017: From New Materials to New Systems, 1038407 (Presented at SPIE Optical Engineering + Applications: August 06, 2017; Published: 23 August 2017); https://doi.org/10.1117/12.2276985.
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