Computationally efficient method for Fourier transform of highly chirped pulses for laser and parametric amplifier modeling

Alexey Andrianov*, Aron Szabo, Alexander Sergeev, Arkady Kim, Vladimir Chvykov, Mikhail Kalashnikov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We developed an improved approach to calculate the Fourier transform of signals with arbitrary large quadratic phase which can be efficiently implemented in numerical simulations utilizing Fast Fourier transform. The proposed algorithm significantly reduces the computational cost of Fourier transform of a highly chirped and stretched pulse by splitting it into two separate transforms of almost transform limited pulses, thereby reducing the required grid size roughly by a factor of the pulse stretching. The application of our improved Fourier transform algorithm in the split-step method for numerical modeling of CPA and OPCPA shows excellent agreement with standard algorithms.

Original languageEnglish
Pages (from-to)26974-26982
Number of pages9
JournalOptics Express
Volume24
Issue number23
DOIs
Publication statusPublished - 14 Nov 2016

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