It is shown that the design of optoelectronic systems can be simplified considerably and their functionality can be extended through combined detection and processing of the information-carrying optical and electric signals by a photoresistor. Photoresistor-based devices that are used to generate amplitude-and phase-modulated signals and operate as synchronous detectors and spectrum analyzers are proposed. The factor of nonlinear distortions introduced by the photoresistor into a phase-modulated signal is estimated.
