Abstract
It is essential that the transmitting laser of a coherent laser radar operate in single mode. In an unstable resonator, single transverse mode operation is determined by proper choice of physical cavity parameters. Single longitudinal mode operation can be achieved by seed injection and cavity matching. In this paper we present our results from our studies of CO2 laser seed injection using an unstable resonator for our oscillator and a single mode CW CO2 laser as the injection source.
© 1991 Optical Society of America
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