Abstract
Microwave-modulated light is demodulated in an optical heterodyne receiver. An automatic frequency control (AFC) system acquires the incoming microwave-modulated laser signal. The AFC system makes use of an optical single-sideband suppressed-carrier modulator to offset the frequency of the laser local oscillator by 2.5 Gc/sec, and also to track the rapid variations in difference frequency between the signal and local oscillator.
© 1965 Optical Society of America
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