Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1980-09-30
1983-07-12
Orsino, Jr., Joseph A.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455611, 455618, H04B 900
Patent
active
043935176
ABSTRACT:
The tail of a carbon-dioxide (CO.sub.2) transverse electrode discharge at mospheric pressure (TEA) laser pulse optical signal is pulse code modulated by a Pockels Cell. A modulation depth of 100% is obtained to prevent high false alarm rates under dynamic transmission conditions. The device external to the laser cavity will extend the capabilities of the CO.sub.2 TEA laser by using a tail for information transfer while preserving the gain switch spike for rangefinding. A high repetition rate is achieved using a power supply that electrically charges and discharges the Pockels Cell which, in turn, activates the polarization switch.
REFERENCES:
patent: 3243592 (1966-03-01), Tomiyasu et al.
patent: 3420600 (1969-01-01), Mevers et al.
Buser Rudolph G.
Nomiyama Neal T.
Osche Gregory R.
Rohde Robert S.
Gibson Robert P.
Harwell Max L.
Lee Milton W.
Orsino Jr. Joseph A.
The United States of America as represented by the Secretary of
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