ARRANGEMENT FOR DETECTING INTENSITY-MODULATED LIGHT SIGNALS

摘要

The aim is to specify an arrangement for detecting intensity- modulated light signals which has a higher sensitivity relative to a previous arrangement which consists of an optical detector device for detecting an intensity-modulated optical signal, a downstream mixer stage in the form of an electronic mixing device and a downstream lock-in amplifier. …For this purpose, the mixer stage consists of an optical mixing device (StRK), into which the optical signal can be coupled and from which the mixed signal (MS1, MS2) can be extracted as light signal, and the mixed signal (SM1, MS2) is fed to an optical detecting device (DE1). …Application wherever intensity-modulated light signals are to be detected, for example in optical telecommunications engineering.