Coherent detection SNR of an array of detectors
Abstract
General equations are derived for the SNR of a coherent (heterodyne) receiver constructed from an array of detectors and IF amplifiers. The equations are in terms of the distribution functions of the signal and local oscillator fields, the distributions of gain and phase shift among the IF amplifiers, and the sizes and shapes of the individual detectors. Such a receiver can efficiently detect any signal distribution function, no matter how badly aberrated, if the individual detectors are small enough, and the IF amplifier gains and phase shifts are set correctly.
 Publication:

Applied Optics
 Pub Date:
 February 1976
 DOI:
 10.1364/AO.15.000453
 Bibcode:
 1976ApOpt..15..453F
 Keywords:

 Intermediate Frequency Amplifiers;
 Optical Heterodyning;
 Signal Detectors;
 Signal To Noise Ratios;
 Coherent Light;
 Distribution Functions;
 Matrices (Circuits);
 Phase Shift;
 Power Efficiency;
 Power Gain;
 Communications and Radar;
 DETECTION;
 HETERODYNING