Static information storage and retrieval – Radiant energy
Patent
1992-03-25
1994-01-04
LaRoche, Eugene R.
Static information storage and retrieval
Radiant energy
365151, 365153, 365119, G11C 1302, G11C 1304
Patent
active
052766373
ABSTRACT:
Data storage methods and apparatus are disclosed that utilize a swept-carrier optical approach with an inhomogeneously broadened absorber material having multiple special storage cells. Data are encoded on a data pulse by appropriately modulating the data pulse. Data storage in a storage cell is effected by exposing the cell to the data pulse and a reference pulse cotemporal with the data pulse. Both the data and reference pulses are frequency-chirped across the inhomogeneously broadened bandwidth of the absorber material, the data pulse being chirped at a frequency that is offset relative to the reference pulse. Data retrieval from the storage cell is performed by exposing the cell to a read pulse which causes the cell to produce a signal pulse comprising the encoded data. The read pulse can have a temporal profile that produces a signal pulse shaped either similarly to the data pulse or as a mirror image of the data pulse.
REFERENCES:
patent: 3568167 (1971-03-01), Carson
patent: 3896420 (1975-07-01), Szabo
patent: 4101976 (1978-07-01), Castro et al.
patent: 4158890 (1979-06-01), Burland
patent: 4459682 (1984-07-01), Mossberg
patent: 4956812 (1990-09-01), Seya et al.
Bai et al., "Real-Time Optical Waveform Convolver/Cross Correlator," Appl. Phys. Lett. 45:714-716 (1984).
Babbitt et al., "Mixed Binary Multiplication of Optical Signals by Convolution in an Inhomogeneously Broadened Absorber," Applied Optics 25:962-965 (1986).
Mossberg, "Time-Domain Frequency-Selective Optical Data Storage," Opt. Lett. 7:77-79 (1982).
Carlson et al., "Temporally Programmed Free-Induction Decay," Phys. Rev. 30 A:1572-1574 (1984).
Babbitt et al., "Convolution, Correlation, and Storage of Optical Data in Inhomogeneously Broadened Absorbing Materials," Proceedings of SPIE, Advances in Optical Information Processing II 639:56-63 (Apr. 1986).
Hoyt, "Spectral Hole-Burning in the Storage Hierarchy?," In Persistent Spectral Hole-Burning: Science and Applications, Summaries of Papers Presented at the Persistent Spectral Hole-Burning: Science and Applications Topical Meeting, Sep. 26-28, 1991, Monterey, Calif., 1991 Technical Digest series, vol. 16, Optical Society of America, pp. 214-217 (1991).
Mossberg, "Temporal Accessing of Frequency-Domain Optical Storage: Specific Approaches and General Considerations," Persistent Spectral Hole-Burning: Science and Applications, Summaries of Papers Presented at the Persistent Spectral Hole-Burning: Science and Applications Topical Meeting, Sep. 26-28, 1991, Monterey, Calif., 1991 Technical Digest Series, vol. 16, pp. 164-169 (1991).
Kachru, "Stimulated Echo Optical Memory," In Proceedings of the 3-D Memory Workshop, Snowbird, Utah, Mar. 1990, pp. 64-67 (1990).
LaRoche Eugene R.
State of Oregon Acting By and Through the State Board of Higher
Tran Andrew
LandOfFree
Swept-carrier frequency selective optical memory and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Swept-carrier frequency selective optical memory and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Swept-carrier frequency selective optical memory and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-312782