Classical and quantum approaches to power spectrum measurement by diffractional methods

摘要

Abstract: Power spectrum measurements by diffractional methodswith classical and quantum description ofelectromagnetic signals are considered. Classicalaspects of spectral measurements (SM) theory is basedon classical approximation of exact quantumrepresentation of signal and spectrum analyzer (SA)description in terms of linear system theory. Quantumaspect of SM theory considers SM process astransformation temporal statistics of photons to theirspace distribution statistics, performed by SA. !32