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Holographic Data Storage

A look at the Future or Data Storage

Daniel Neidermyer

on 12 May 2011

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Transcript of Holographic Data Storage

Interference Pattern Interference Pattern Holographic Memory By: Dan Neidermyer Holographic Memory - Defined In 1952 Yehuda Hirshberg created a process called photochromism, which he suggested be used for an erasable memory. Next there was Valeri Barachevskii whom showed that photochromism could be produced by the excitation of two photons. Thus laying down one of the major foundations for Holographic Memory. Peter T. Rentzepis showed that these properties could lead to Three-Dimentional Data Storage. This Started The Revoloution How It Works First it splits the laser into two beams.
These beams Serve seperate purposes
The beams are called the Reference Beam and the Signal Beam.

More about them Later

This Laser leads to..... Spatial Light Modulator Converts Binary Data From an "LCD" Screen
A series of "Windows" that are either opened or closed, Representing either a 0 or a 1 depending on if their is any light being recieved through that point in the SLM
These windows are only a few microns wide and allow for entire pages of Data to be read at one time. The Process - Continued After data goes through the SLM it is recieved by a light sensative crystal. Where The two beams meet creates a pattern that the system reads as a data input called the. Where the two beams meet selects where the data is written on the crystal or light sensative photopolymer. During recording 1/1000th of a MM can throw the entire process off and make the data unreadable Multiplexing How to fit more data on a medium Multiplexing allows for more and more data to be written to a surface such as an optical disc.
The more multiplexing methods used the more data can be stored in one area. Types of Multiplexing Non Mechanical: Most common.
Basis of holographic memory.
Reference beam is put at same angle as during recording.
Angle Changed by High Frequency Sound Waves. Angular Wavelength Multiplexing Allows for Multiple pages to be recorded at the same time. Phase Encoding Multiplexing Splits Reference Beam into "Mini" Beams.
Allows faster read times.
No mechanical access times needed.
Mechanical Spatial Multiplexing
Altering where source and reference beams enter recording medium
Not likely to be used because mechanical access times would slow entire system down. Current Data Storage Comparisons Now we move to a video showing an actual working system of holographic memory. Holographic Memory is a potential replacement technology in the area of high-capacity data storage currently dominated by magnetic and conventional optical data storage Why it could work Faster and Faster internet connections
People need to store more and more data
People are looking for more speed with memory and whats faster than the speed of light?
Recent deal signed between InPhase (a holographic disk manufacturer and Nintendo Main Advantages - Stored data is redundant because of the nature of the interference pattern between the reference and signal beams that is imprinted into the holographic medium.

- The data can be corrupted to a certain level before information is lost so this is a very safe method of data storage.
- Multiplexing allows many different patterns to be stored in the same crystal volume simply by changing the angle at which the reference beam records the hologram. Why it might not work Current technology does not make it possible for consumers
Cost (still up in the air)
No current suitable recording materials for mass production
Not sure of the future with recent advances to magnetic storage and internet speed they could not even be used as we will no longer use discs. Conclusion Could it Happen?

Maybe. Do I want it to happen after learning about the system? Yes!
Full transcript