20 September 1982 Wideband Signal Recording And Playback With High Time-Bandwidth Product
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Abstract
An analog recording technique is described where an acousto-optic Bragg cell is driven by an amplitude-modulated carrier and strobed with a pulsed laser. The acoustic column of the Bragg cell is imaged onto film using the zero order diffracted light to maximize system efficiency. Performance characteristics of system components are examined relative to their impact on system bandwidth, dynamic range, and frequency resolution. A breadboard recorder was used to demonstrate the technique and results from system tests are presented. The breadboard recorder achieved a bandwidth extending from 10 to 190 MHz with a dynamic range peak to RMS exceeding 22 dB. A two-dimensional, optical processing technique is described where time-bandwidth products exceeding 106 can be achieved.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. A. Coppock, R. A. Coppock, R. F. Croce, R. F. Croce, R. J. Ellis, R. J. Ellis, R. N. Markell, R. N. Markell, } "Wideband Signal Recording And Playback With High Time-Bandwidth Product", Proc. SPIE 0390, High Speed Read/Write Techniques for Advanced Printing and Data Handling, (20 September 1982); doi: 10.1117/12.935018; https://doi.org/10.1117/12.935018
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