Optical data storage using temperature stabilizer lasers

Details Optical data storage using temperature stabilizer lasers Optical data storage using temperature stabilizer lasers

1990-09-10

1992-08-04

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369109, 369116, 369121, 369122, G11B 7125

Patent

active

051365723

ABSTRACT:
An array of diode lasers selected to emit at certain fixed wavelengths is assembled to temperature stabilzed Bragg reflectors to assure maintenance of the selected wavelength within 1 .ANG.. One laser is included in the array for each wavelength at which absorption will occur within a photochemically active optical storage medium. Each temperature stabilized laser is focussed by a lens onto an optical storage medium containing photoactive chemical components containing guest and hose molecules, as is known in the art. Light emitted by each laser will be used to burn a pit for each bit of data at the locations of the storage medium. One or more photodetectors located on the opposite side of the sotrage medium to detect the presence or absence of a hole with respect to the selected wavelength with which the hole was initially burned. A similar device is available with a temperature stabilized tunable laser which accurately controls the selected wavelength withing 1 .ANG..

REFERENCES:
patent: 4675974 (1987-06-01), Pohker et al.
patent: 4783776 (1988-11-01), Ishigaki et al.
patent: 4878224 (1989-10-01), Kuder et al.
patent: 4908813 (1990-03-01), Ojima et al.
Reading and Writing of Photochemical Holes Using GaAlAs-Diode Lasers, P. Pokrowsky, et al., Optics Letters, vol. 8, No. 5, May 1983, pp. 280-282.
Videodisc and Optical Memory Systems, Jordan Isailovic', 1985, Prentice Hall, Inc., Chapter 7, "Optical Memories", pp. 293-322.

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