Acousto-Optic Isolator (AOI).
Final rept. 16 Jun-15 Dec 72,
MARTIN MARIETTA AEROSPACE ORLANDO FLA
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Coherent CO2 radars having amplification stages following a CO2 master oscillator exhibit spurious feedback which tends to pull the frequency of the signal. The acousto-optic isolator AOI concept has shown promise to correct the feedback problem. Under this program, a number of AOI devices have been constructed, tested, and compared. Using a master oscillatorpower amplifier simulator, instability of the master oscillator has been determined to be a function of feedback level, the difference between feedback signal and oscillator frequencies, and averaging time. AOI devices are shown to enhance the stability of the master oscillator. Author
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