Broadband data modulation system

Details Broadband data modulation system Broadband data modulation system

1974-10-22

1976-06-08

Moskowitz, Nelson

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

250199, 350162R, 178 6, H01S 300, H04B 900, G02F 128

Patent

active

039626571

ABSTRACT:
A broadband data modulation system for the transmission of amplitude and frequency modulation data with a bandwidth up to and greater than 500 MHz. The system involves the multiple heterodyning of microwave signals with infrared or optical signals. The data modulation system utilizes multiple passes of the infrared or optical signal through a crystalline material which also has an acoustic signal forming an acousto-optic grating. Fixed gratings are also imbedded in the crystal so as to aid in the guidance of the infrared or optical signal. The output of the crystal comprises an infrared or optical signal modulated with the desired data, which can be transmitted optically to a transponder, which can in turn convert the last-named infrared or optical signal into a transmitted correspondingly modulated RF signal.

REFERENCES:
patent: 3365581 (1968-01-01), Tall et al.
patent: 3565514 (1971-02-01), Bate et al.
Gottlieb, "Opto-Acoustic Signal Processors for Extending Radar System Caplities," 2/74, pp. 21-27, Optics & Laser Tech.

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