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Sparse-wavelength angle-multiplexed volume holographic memory system: analysis and advances.

S Campbell, P Yen

|November 19, 2010

Summary

We developed a hybrid holographic memory system combining wavelength and angle multiplexing. This approach improves storage density and data throughput in lithium niobate, enabling 2000 holograms in a small volume.

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Area of Science:

Optics and Photonics
Data Storage Technologies
Materials Science

Background:

Volume holographic data storage offers high potential density.
Traditional methods face limitations in spectral tuning, angle control, and optical requirements.
Efficient K-space addressability is crucial for high-capacity storage.

Purpose of the Study:

To present and analyze a hybrid wavelength-and-angle-multiplexed volume holographic memory system.
To investigate practical aspects like storage density and information throughput.
To demonstrate the system's capability through experimental storage of multiple holograms.

Main Methods:

Hybridization of wavelength and angle multiplexing techniques.
Analysis of system performance considering realistic parameters.

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Experimental implementation using lithium niobate as the storage medium.

Main Results:

The hybrid system relaxes requirements on spectral-tuning sources and angle-tuning devices.
Maintained large K-space addressability is achieved.
Successfully stored 2000 sparse-wavelength angle-multiplexed volume holograms in a 1.86-cm3 lithium niobate crystal.

Conclusions:

The hybrid multiplexing strategy enhances the practicality and performance of volume holographic memory.
This system addresses key challenges in storage density and photon-limited throughput.
Experimental validation confirms the viability of storing a large number of holograms.