Experimental demonstration of impulse-equivalent time-domain optical memory.

Area of Science:

• Optics and Photonics
• Materials Science
• Data Storage Technologies

Background:

• Optical data storage offers high density and speed.
• Time-domain storage methods are crucial for advanced optical memory.
• The impulse-equivalent approach provides a framework for optical data manipulation.

Purpose of the Study:

• To demonstrate the feasibility of the impulse-equivalent approach for time-domain optical data storage.
• To evaluate the storage capacity and recall fidelity of optical data in a crystal medium.
• To explore the potential applications of this technique in data encryption.

Main Methods:

• Utilized the impulse-equivalent approach for optical data writing and reading.
• Employed a 128-bit real Huffman-Ackroyd code for write-read sequences.
• Stored data in a 40-MHz spectral channel within a Europium-doped Yttrium Orthosilicate (Eu(3+):Y(2)SiO(5)) crystal.

Main Results:

• Successfully stored a 42-microsecond data stream containing 420 bits.
• Achieved data recall up to eight times with high signal fidelity.
• Observed no measurable sidelobe-induced noise during data retrieval.
• Investigated data retrieval using mismatched write-read pulses.

Conclusions:

• The impulse-equivalent approach is effective for time-domain optical data storage.
• Eu(3+):Y(2)SiO(5) crystals are suitable media for high-fidelity optical data storage.
• The technique shows promise for secure data encryption applications due to sensitivity to mismatched pulses.