Cavity Techniques for Holographic Storage Recording
Times enhancement in write data rate, out of 1.4 theoretical maximum for materials absorption of 16%.
By Francis Pelletier | March 18, 2016 at 2:50 pmOSA Publishing, Optics Express has published an article written by Bo E. Miller and Yuzuru Takashima, University of Arizona, Takashima Group, Optical Sciences, 1630 E. University Blvd., Tucson, Arizona 85721-0094, USA.
Fig. 4 : Schematic diagram of the experimental setup for plane wave recording.
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Abstract: “Conventionally, reading and writing of data holograms utilizes a fraction of the light power because of a trade off in write and read efficiencies. This system constraint can be mitigated by applying a resonator cavity. Cavities enable more efficient use of the available light leading to enhanced read and write data rates with no additional energy cost. This enhancement is inversely related to diffraction efficiency, so these techniques work well for large capacity holographic data storage having low diffraction efficiency. The enhancement in write data transfer rate is evaluated by writing plane wave holograms and image bearing holograms in Fe:LiNbO3 with a 532 nm wavelength laser. We confirmed 1.2 times enhancement in write data rate, out of a 1.4 theoretical maximum for materials absorption of 16%.”