Apparatus for detecting intensity-modulated light signals

Details Apparatus for detecting intensity-modulated light signals Apparatus for detecting intensity-modulated light signals

1988-08-02

1991-12-24

Kuntz, Curtis

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

H04B 1000

Patent

active

050757938

ABSTRACT:
An apparatus for detecting intensity-modulated light signals is provided that exhibits higher sensitivity in comparison to prior apparatus and which is composed of an optical detector for detecting an intensity-modulated optical signal and a mixer stage in the form of an electronic mixing device having a subsequent lock-in amplifier. The mixer stage comprises an optical mixing device into which the optical signal can be coupled and from which the mixed signal can be taken as an optical signal and the mixed signal is fed to an optical detector device.

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