Optical recording medium, method of recording information, metho

Details Optical recording medium, method of recording information, metho Optical recording medium, method of recording information, metho

1998-03-16

1999-10-19

Cabeca, John W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369100, 369288, 369272, G11B 700

Patent

active

059700394

ABSTRACT:
A method of recording information in an optical recording medium, which comprises two steps. In the first step, a coherent light pulse train which resonates with a transition between the first and third energy levels and coherent light which resonates with a transition between the second and third energy levels or a transition between the first and second energy levels are applied to the optical recording medium, thereby causing the light pulse train to pass through the optical recording medium. In the second step, an intensity change of an external field is supplied to the medium, while the light pulse train is passing through the optical recording medium, thereby fixing sites in a thickness direction of the medium, at which the absorption spectrum of the medium is changed.

REFERENCES:
patent: 5256849 (1993-10-01), Scully
patent: 5754511 (1998-05-01), Gemma et al.
patent: 5771117 (1998-06-01), Harris et al.
O. Schmidt et al.; "Steep Dispersion and Group Velocity Below c/3000 in Coherent population Trapping", Physical Review A, vol. 53, No. 1, pp. R27-R30, Jan. 1996.

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