Multiple layer optical memory system using second-harmonic-generation readout
This patent describes an optical read and write information storage system capable of storing information on more than one layer. It comprises: radiation means for writing information on and illumination of an information storage means, the radiation means emitting light of a preselected first frequency; information storage means comprising surface storage means for receiving radiation from the radiation means and capable of being surface modified in response to the radiation means when operated in a writing mode and capable of generating light containing a second harmonic frequency of the preselected first frequency when illuminated by the radiation means at the preselected first frequency; and means receiving light generated by the surface storage means when illuminated by the radiation source for detecting second harmonic frequency light within the received light and for generating an information signal from the detected second harmonic frequency light.
- Assignee:
- The Regents of the Univ. of California, Berkeley, CA (USA)
- Patent Number(s):
- US 4829505; A
- Application Number:
- PPN: US 7-007460A
- OSTI ID:
- 5729951
- Resource Relation:
- Patent File Date: 28 Jan 1987
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
INFORMATION SYSTEMS
MEMORY DEVICES
DESIGN
HARMONIC GENERATION
OPERATION
READOUT SYSTEMS
FREQUENCY MIXING
LASERS
OPTICAL EQUIPMENT
VISIBLE RADIATION
ELECTROMAGNETIC RADIATION
EQUIPMENT
RADIATIONS
990300* - Information Handling