Frequency-chirped copropagating multiple-bit stimulated-echo storage and retrieval in Pr(3+):YAlO(3)

Area of Science:

• Quantum Information Science
• Atomic, Molecular, and Optical Physics
• Materials Science

Background:

• Optical data storage is crucial for high-density information retrieval.
• Stimulated-echo techniques offer potential for high-capacity data storage.
• Praseodymium-doped materials are promising candidates for optical memory applications.

Purpose of the Study:

• To demonstrate high-bit information storage and recall using a frequency-chirped stimulated-echo.
• To evaluate the practicality of the copropagating excitation scheme for optical memory.
• To assess the impact of frequency chirping on echo pulse fidelity and stability.

Main Methods:

• Utilized a frequency-chirped ring dye laser for excitation.
• Employed the copropagating stimulated-echo geometry.
• Stored and recalled 48 bits of information on the (3)H(4)-(1)D(2) transition in Pr(3+):YAlO(3).

Main Results:

• Successfully stored and recalled 48 bits of data.
• Demonstrated that the copropagating scheme simplifies implementation by eliminating beam alignment.
• Showcased significant improvements in echo pulse shape reproduction and shot-to-shot amplitude stability due to frequency chirping.

Conclusions:

• Frequency-chirped stimulated-echo offers a robust method for optical data storage.
• The copropagating geometry is practical for real-world applications of stimulated-echo memory.
• Frequency chirping enhances both data fidelity and stability in optical memory systems.