Research Study of a CO2 Laser Radar Transmitter
Final technical rept. 1 Nov 1966-15 Aug 1968
RAYTHEON CO WALTHAM MA RESEARCH DIV
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A prototype high power laser radar transmitter at 10.6 micrometers wavelength has been developed for installation at Lincoln Laboratorys Millstone Hill radar site. This report summarizes the three phases of its development 1 Exploratory work on the properties of dc- and pulse-excited CO2 laser amplifiers and their use in producing trains of high power optical pulses, 2 Design of 1 kW average 10 kW peak power transmitter, and 3 Operational tests of the transmitter. The signal for a stable oscillator is amplified to a level beyond 200W, formed into a train of 10 microsec pulses by mechanical modulation before amplification to the 10 kW level. All amplifiers are dc-excited. Subjects treated include gain limitations set by spurious oscillation, pulse-to-pulse amplitude stability, oscillator-amplifier interaction, and output beam profile.
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