Intuitive analysis of space-time focusing with double-ABCD calculation.
We analyze the structure of space-time focusing of spatially-chirped pulses using a technique where each frequency component of the beam follows its own Gaussian beamlet that in turn travels as a ray through the system. The approach leads to analytic expressions for the axially-varying pulse duration, pulse-front tilt, and the longitudinal intensity profile. We find that an important contribution to the intensity localization obtained with spatial-chirp focusing arises from the evolution of the geometric phase of the beamlets.
Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA. cdurfee@mines.edu
Charles G
CG
Durfee
Michael
M
Greco
Erica
E
Block
Dawn
D
Vitek
Jeff A
JA
Squier
D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation