Vorrichtung zur Messung der Kennzeichen der optischen Frequenzmodulation.

摘要

A frequency-modulated light signal is introduced into an input 12 of a Mach-Zehnder interferometer 1. The light signals at the outputs 17 and 18 are converted into electrical signals and subtracted, giving an output signal in which the effect of the frequency-modulation is not overwhelmed by the effect of amplitude-modulation of the input signal.