Spatiotemporal Metrology of Broadband Optical Pulses

Dorrer, C.

doi:10.1109/jstqe.2019.2899019

Cited by 53 publications

(32 citation statements)

References 228 publications

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“…Research work on STC metrology already started about 20 years ago. But it is only recently that tractable techniques providing full amplitude and phase information on the laser field in 3D have become available and in common use [7][8][9][10][11][12]. Complete spatio-temporal characterization of ultrashort beams is thus about to be a routine metrology procedure, especially with commercial instruments now available [13].…”

Section: Hhg Spectroscopymentioning

confidence: 99%

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

Jeandet,

Jolly,

Borot

et al. 2021

Preprint

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The investigation of spatio-temporal couplings (STCs) of broadband light beams is becoming a key topic for the optimization as well as applications of ultrashort laser systems. This calls for accurate measurements of STCs. Yet, it is only recently that such complete spatio-temporal or spatio-spectral characterization has become possible, and it has so far mostly been implemented at the output of the laser systems, where experiments take place. In this survey, we present for the first time STC measurements at different stages of a collection of high-power ultrashort laser systems, all based on the chirped-pulse amplification (CPA) technique, but with very different output characteristics. This measurement campaign reveals spatio-temporal effects with various sources, and motivates the expanded use of STC characterization throughout CPA laser chains, as well as in a wider range of types of ultrafast laser systems. In this way knowledge will be gained not only about potential defects, but also about the fundamental dynamics and operating regimes of advanced ultrashort laser systems.

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Section: Hhg Spectroscopymentioning

confidence: 99%

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

Jeandet,

Jolly,

Borot

et al. 2021

Preprint

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“…A range of techniques have been demonstrated for the complete spatio-temporal characterization (retrieval of electric field amplitude and phase) of linearly polarized pulses [6].…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal characterization of ultrashort vector pulses

Zdagkas¹,

Nalla²,

Papasimakis³

et al. 2021

Preprint

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Ultrafast vectorially polarized pulses have found many applications in information and energy transfer owing mainly to the presence of strong longitudinal components and their spacepolarization non-separability. Due to their broad spectrum, such pulses often exhibit space-time couplings, which significantly affect the pulse propagation dynamics leading to reduced energy density or utilized to create new effects like a rotating or sliding wavefront at focus. Here, we present a new method for the spatio-temporal characterization of ultrashort cylindrical vector pulses based on a combination of spatially resolved Fourier transform spectroscopy and Mach-Zehnder interferometry. The method provides access to spatially resolved spectral amplitudes and phases of all polarization components of the pulse. We demonstrate the capabilities of the method by completely characterizing a 10 fs radially polarized pulse from a Ti:sapphire laser at 800 nm.

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“…In general, high-order dispersion results not only from a mismatch between the stretcher and compressor, but also from the misalignment of components, limited precision, chromatic aberration in optics, etc. An imperfect grating stretcher may produce residual angular dispersion, which leads to pulse-front tilt, yielding a pulse duration longer than allowable by the optical spectrum when integrated over the near-field or far-field [21][22][23][24][25]. As the element principally responsible for introduction of dispersion, it is important to carefully choose and precisely establish the grating stretcher and its corresponding compressor.…”

Section: Introductionmentioning

confidence: 99%

Dispersion Management in 10-PW Laser Front End

Liu

Wang

et al. 2020

Optics

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To improve pulse contrast in chirped pulse amplification petawatt laser systems, the regenerative amplifier is substituted with a multipass amplifier at the Shanghai Superintense Ultrafast Laser Facility (SULF). To reduce the consequent angular dispersion of the broadband spectrum, a double-grating stretcher is established in the SULF front end. A grating compressor is set up for the 10-PW front end to obtain 20-TW output. An accurate adjustment method of grating attitude (angular position) is presented, which references the direction of gravity, improving dispersion management and focusing ability of the beam. After a pulse passes the front end compressor, its duration and phase in the frequency domain are measured, and the duration can be continuously compressed to <24 fs.

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Spatiotemporal Metrology of Broadband Optical Pulses

Cited by 53 publications

References 228 publications

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

Spatio-temporal characterization of ultrashort vector pulses

Dispersion Management in 10-PW Laser Front End

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