Accession Number:

ADA279912

Title:

Time Domain Spectral Hole-Burning Storage

Descriptive Note:

Final rept. 30 Sep 1992-29 Dec 1993

Corporate Author:

IBM ALMADEN RESEARCH CENTER SAN JOSE CA

Personal Author(s):

• Jefferson, Michael

Report Date:

1994-05-02

Pagination or Media Count:

19.0

Abstract:

This work achieved several substantial results. A highly stabilized laser system suitable for many detailed studies of data storage phenomena was constructed and made to work. This laser was essential for the investigations which followed. Using the stabilized laser, a real time correlator was demonstrated, which correctly identified all occurances of a test sequence imbedded in random data. This correlator is the first demonstration of the use of phase modulation to store and retreive data in time domain hole-burning. In the frequency domain, narrow holes were burned and scanned, and information storage at a spectral density exceeding 50,000 bits per spot was demonstrated, with perfect recall and excellent signal to noise. We have also made the first demonstration of a novel technique for storing and retreiving phase modulated data streams with time domain spectral hole-burning. This demonstration has been disclosed for patent purposes.

Descriptors:

• *OPTICAL STORAGE
• *TIME DOMAIN
• TEST AND EVALUATION
• FREQUENCY
• DENSITY
• REAL TIME
• DEMONSTRATIONS
• LASERS
• SEQUENCES
• TIME
• STORES
• RECALL
• CORRELATORS
• PATENTS
• PHASE MODULATION
• FREQUENCY DOMAIN
• RARE EARTH ELEMENTS
• COMBUSTION
• SIGNALS
• DATA STORAGE SYSTEMS
• DOPING
• NOISE
• BURNING RATE
• MODULATION

Subject Categories:

• Electrooptical and Optoelectronic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE