High speed femtosecond pulse characterization based on spectral interferometry

Abstract

In this work, we present spectrum and spectral phase retrieval of femtosecond pulses at 74 Hz refresh rate by a spectral interferometry technique. Different spectral phase designs including high order chirp are measured and generated with a pulse shaper based on a micro-machined deformable membrane mirror (MMDM).

Ultrashort laser pulse characterization techniques

“…The ambiguity function of the function in the time-domain is defined by: (10) and the Wigner function on the time-domain is defined by: © Sociedad Española de Óptica (11) or, equivalently in the frequency domain: (12) where and form a pair of Fourier transforms, i.e. The ambiguity and Wigner functions are related by a 2-D Fourier transform as given by the following expression: (13) where the primed are dummy variables.…”

“…The intensity is given by: (14) and the power spectrum: The spectral interferometry technique is used for the retrieval of the phases in previous cases [12,13].…”

Supercontinuum light source with adjustable spectral width by inducing mechanical stresses in photonic crystal fiber

“…The control of supercontinuum spectral characteristics is crucial for many scientific and technological applications. For this reason, actually new methods are being developed based on laser techniques that have succeeded in temporarily narrow pulses [1,2] allowing the supercontinuum (SC) generation have a remarkable progress. The features provided by new pumping sources, such as a large spectral width and a high power level can be found in a microchip laser [3].…”