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Method for holographic storage using peristrophic multiplexing.

K Curtis, A Pu, D Psaltis

|October 22, 2009

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Peristropic multiplexing, a novel hologram storage technique, enhances data density by rotating materials. This method, combined with angle multiplexing, successfully stored 295 holograms on a thin photopolymer film.

Area of Science:

Optics and Photonics
Materials Science
Information Storage

Background:

Holographic data storage offers high potential density but requires efficient multiplexing techniques.
Existing methods like angle, wavelength, and phase multiplexing have limitations in maximizing storage capacity.
Developing new multiplexing strategies is crucial for advancing holographic storage systems.

Purpose of the Study:

To introduce and demonstrate peristropic multiplexing as a novel method for increasing hologram storage density.
To investigate the combination of peristropic multiplexing with existing techniques like angle multiplexing.
To experimentally validate the effectiveness of peristropic multiplexing using a photopolymer film.

Main Methods:

Describing a method of multiplexing holograms by rotating the recording material or beams, termed peristropic multiplexing.

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Experimentally demonstrating peristropic multiplexing using Du Pont's HRF-150 photopolymer film.

Combining peristropic multiplexing with angle multiplexing to achieve higher storage densities.

Main Results:

Successfully multiplexed a total of 295 holograms.
Utilized a thin 38-microm-thick photopolymer film for hologram storage.
Demonstrated the feasibility of combining peristropic and angle multiplexing.

Conclusions:

Peristropic multiplexing is an effective technique for increasing storage density in holographic systems.
The combination of peristropic and angle multiplexing significantly enhances the number of holograms storable in a given material.
This approach shows promise for the development of next-generation high-capacity holographic storage devices.