Study of linear optical systems by means of a pulsed method

摘要

This paper discusses fundamental questions of the study of the diffraction processes of scalar waves in the Kirchhoff approximation, using the concept of a delta perturbation. The method is convenient for investigating the field of ultrashort pulses in linear systems. Simple relationships arc presented that describe the diffraction field in the near and far zones. The main features of the field Structure and approximate methods for describing it arc shown. It is established that the method developcd-here corresponds to the classical relationships for rnonochromatic vibrations. Previously unknown conservation laws for diffracted waves are derived. (C) 2005 Optical Society of America.