Accurate and efficient implementation of the von Neumann representation for laser pulses with discrete and finite spectra

Details Accurate and efficient implementation of the von Neumann representation for laser pulses with discrete and finite spectra Accurate and efficient implementation of the von Neumann representation for laser pulses with discrete and finite spectra

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11j5052d&link_type=abstract

New Journal of Physics, Volume 11, Issue 10, pp. 105052 (2009).

Physics

7

Scientific paper

We recently introduced the von Neumann picture, a joint time-frequency representation, for describing ultrashort laser pulses. The method exploits a discrete phase-space lattice of nonorthogonal Gaussians to represent the pulses; an arbitrary pulse shape can be represented on this lattice in a one-to-one manner. Although the representation was originally defined for signals with an infinite continuous spectrum, it can be adapted to signals with discrete and finite spectrum with great computational savings, provided that discretization and truncation effects are handled with care. In this paper, we present three methods that avoid loss of accuracy due to these effects. The approach has immediate application to the representation and manipulation of femtosecond laser pulses produced by a liquid-crystal mask with a discrete and finite number of pixels.

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