Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1974-10-22
1976-03-16
Moskowitz, Nelson
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
350161, 250199, H04B 910, G02F 128
Patent
active
039449483
ABSTRACT:
A cascaded data modulation system for the transmission of amplitude and frequency modulation data with a bandwidth up to and greater than 500MHz. The system involves the multiple heterodyning of microwave signals with infrared or optical signals. The data modulation system utilizes the passing of an infrared or optical signal through several successive acousto-optic crystals. Curved and straight prisms are placed alternately between the crystals to guide the infrared or optical signal. The crystals carry acoustic signals which modulate the infrared or optical signal in amplitude and frequency. The output of the crystal system 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: 2797619 (1957-07-01), Rosenthal
patent: 3530298 (1970-09-01), Hubbard et al.
patent: 3539245 (1970-11-01), Brienza
patent: 3624402 (1971-11-01), Thaler
patent: 3799652 (1974-03-01), Torguet
Borsuk et al., "Frequency Modulated Laser Communication System", 10/70, pp. 07-209, IEEE Trans. on Sonics & Ultrasonics, Vol. SU-17, No. 4.
Gottlieb, "Opto-Acoustic Signal Processors...", 2/74, pp. 21-27, Optics & Laser Technology.
Lockheed Corp., "A Wideband Laser Communication System," 11/15/71, pp. 1-10.
Moore Ronald W.
Redman Charles M.
Edelberg Nathan
Elbaum Saul
Gibson Robert P.
Moskowitz Nelson
The United States of America as represented by the Secretary of
LandOfFree
Cascaded data modulation system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cascaded data modulation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cascaded data modulation system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-295758