Center Scientifique dOrsay Bat

Orsay, France

Center Scientifique dOrsay Bat

Orsay, France
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Cousin S.L.,ICFO - Institute of Photonic Sciences | Bueno J.M.,University of Murcia | Forget N.,Center Scientifique dOrsay Bat | Austin D.R.,ICFO - Institute of Photonic Sciences | And 2 more authors.
Optics Letters | Year: 2012

We demonstrate a simplified arrangement for spatiotemporal ultrashort pulse characterization called Hartmann-Shack assisted, multidimensional, shaper-based technique for electric-field reconstruction. It employs an acoustooptic pulse shaper in combination with a second-order nonlinear crystal and a Hartmann-Shack wavefront sensor. The shaper is used as a tunable bandpass filter, and the wavefronts and intensities of quasimonochromatic spectral slices of the pulse are obtained using the Hartmann-Shack wavefront sensor. The wavefronts and intensities of the spectral slices are related to one another using shaper-assisted frequency-resolved optical gating measurements, performed at particular points in the beam. This enables a three-dimensional reconstruction of the amplitude and phase of the pulse. We present some example pulse measurements and discuss the operating parameters of the device. © 2012 Optical Society of America.


Forget N.,Center Scientifique dOrsay Bat | Crozatier V.,Center Scientifique dOrsay Bat | Oksenhendler T.,Center Scientifique dOrsay Bat
Journal of the Optical Society of America B: Optical Physics | Year: 2010

We investigate, both theoretically and experimentally, the practical use of amplitude and phase pulse shapers to characterize ultrashort optical pulses. Pulse shapers greatly simplify the optical setup required for the SH-FROG and SPIDER measurement techniques, and both methods can even be implemented with a common optical layout. We also introduce, demonstrate, and compare several new interferometric variants of these techniques, which are compatible with a basic setup comprising no more than a pulse shaper, a type I secondharmonic stage, and a spectrometer. © 2010 Optical Society of America.


Cousin S.L.,ICFO - Institute of Photonic Sciences | Bueno J.M.,University of Murcia | Forget N.,Center Scientifique dOrsay Bat | Austin D.R.,ICFO - Institute of Photonic Sciences | And 2 more authors.
Optics InfoBase Conference Papers | Year: 2011

We demonstrate compact spatio-temporal ultrashort pulse characterisation. A programmable pulse shaper measures amplitude and phase with bFROG in-line and a Shack-Hartmann sensor measures the spatial phase of the pulse across the whole spectrum. © 2010 Optical Society of America.


PubMed | Center Scientifique dOrsay Bat
Type: Journal Article | Journal: Optics letters | Year: 2010

Direct amplitude and phase shaping of mid-infrared femtosecond pulses is realized with a calomel-based acousto-optic programmable dispersive filter transparent between 0.4 and 20 m. The shaped pulse electric field is fully characterized with high accuracy, using chirped-pulse upconversion and time-encoded arrangement spectral phase interferometry for direct electric field reconstruction techniques. Complex mid-infrared pulse shapes at a center wavelength of 4.9 m are generated with a spectral resolution of 14 cm(-1), which exceeds by a factor of 5 the reported experimental resolutions of calomel-based filters.

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