Advanced methods for the characterization of few-cycle light pulses: a comparison
We discuss and compare four methods for measuring the width and pulse profile of ultrashort pulses. For our comparison, we use stable sub-7 fs pulses from a Ti:sapphire oscillator. Interferometric autocorrelation, spectral phase interferometry for direct electric-field reconstruction (SPIDER), a spatially-encoded variant of SPIDER, and interferometric frequency-resolved optical gating (IFROG) are utilized for characterizing pulses from the oscillator. The methods are found to agree within 5% as far as determination of the pulse width is concerned. However, differences are observed in the satellite structure reconstructed by either method. The current state of the art of measuring ultrashort pulses with these methods is reviewed and current limitations, in particular for characterizing complex pulse shapes, are discussed.
KeywordsMain Pulse Chirp Pulse Spectral Phase Group Delay Disper Fringe Structure
- 3.R. Trebino, Frequency-Resolved Optical Gating: The Measurement of Ultrashort Laser Pulses (Kluwer Academic, Boston, MA, 2000)Google Scholar
- 18.A.S. Wyatt, I.A. Walmsley, G. Stibenz, G. Steinmeyer, “Spatially encoded arrangement for spectral phase interferometry for direct electric-field reconstruction of sub-10 fs pulses”, submitted to Opt. Lett. (2005)Google Scholar
- 24.G. Stibenz, G. Steinmeyer, “Structures of interferometric frequency-resolved optical gating”, accepted for publication in IEEE J. Sel. Top. Quantum Electron. (2006)Google Scholar