Femtosecond pulse shaping by dynamic holograms in photorefractive multiple quantum wells

Abstract

Femtosecond pulses can be shaped in the time domain by diffraction from dynamic holograms in a photorefractive multiple quantum well placed inside a Fourier pulse shaper. We present several examples of shaped pulses obtained by controlling the amplitude or the phase of the hologram writing beams, which modifies the complex spectrum of the femtosecond output.

Visible–infrared two-dimensional Fourier-transform spectroscopy

“…Nous exposons enfin dans la section C.3 les points délicatsà prendre en compte pour le dispositif qui nous a paru le plus adapté, le Dazzler [136]. Il est en effet possible de placer dans ce plan un modulateur spatial de phase et/ou d'amplitude programmable qui peutêtre une celluleà cristaux liquides adresséeélectriquement [138][139][140] ou optiquement [141], un miroir déformable [142], ou unélément diffractant tel qu'un cristal acousto-optique [143,144] ou un hologramme [145,146].…”

Compact high-resolution spectral phase shaper

“…Applications include coherent control of energy transfer in molecules, 1 selective Raman spectroscopy and microscopy, 2,3 separation and detection of isotopes and molecules, 4 probing of femtosecond structural dynamics of macromolecules 5,6 and coherent laser control of physicochemical processes. [7][8][9][10] Recently, methods based on holographic patterns 11 have been investigated as well as modulator based shapers with electro-optic, 12 acousto-optic, 13 or liquid-crystal spatial light modulators ͑SLM͒. [14][15][16] In the latter method the modulator is placed in the Fourier plane of the dispersed spectrum.…”

Femtosecond Response of Diffraction Efficiency in GaAs/AlGaAs Photorefractive Multiple Quantum Well

“…[1][2][3][4][5][6] Pulse shapers use spatial control of a spectrally dispersed light signal and all optical gates use ultrafast diffraction because of optically induced gratings. In these applications, not only an ultrafast response time but also a broad diffraction bandwidth is of great importance.…”