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Definition of "Heterodyne Detection" |
The use of an a.f. voltage to distinguish between available signals. The incoming cw signal is mixed with locally generated oscillations to give an a.f. output. / method of measuring the frequency content of an optical signal in which that signal is combined with a known CW reference signal from a local oscillator by means of a square-law detector, sometimes provides a more direct and sensitive representation of the frequency content of a signal than homodyne detection. |
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