The complex-source pulsed beam is a causal wave packet whose properties depend on the imaginary part of the source coordinate. The spectral theory of transient provides a systematic procedure for the unique continuation of the real-source field to the complex-source case.
© 1988 Optical Society of America
Ehud Heyman and Ben-Zion Steinberg, "Spectral analysis of complex-source pulsed beams: reply to comment," J. Opt. Soc. Am. A 5, 757-757 (1988)