Arbitrarily distorted 2-dimensional pulse-front measurement and reliability analysis

Li, Zhaoyang; Ogino, Jumpei; Tokita, Shigeki; Kawanaka, Junji

doi:10.1364/oe.27.013292

Cited by 11 publications

(9 citation statements)

References 34 publications

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“…To compensate for this complex spatiotemporal/‐spectral distortion, Figure 21g shows that we have proposed a very simple method: [ 359 ] by inserting a small double‐pass single grating pair with a deformable retroreflection mirror into the beamline, the wavefront at the spatiospectral coupling plane (at the second and the third gratings) in the main compressor can be precompensated by the deformable mirror at the spatiospectral coupling plane in the small grating pair, and a key process is to image the correction from the small grating pair into the main compressor by the image relay system (telescopes). Another possible solution is to use two matched gratings or deformable gratings as the second and the third gratings in the main compressor to compensate each other; [ 360 ] or to introduce a wavefront‐correction plate or a deformable mirror in the main compressor (between the second and the third gratings) to correct the overlaid wavefront of the second and the third gratings.…”

Section: Bottlenecksmentioning

confidence: 99%

Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

Leng

2022

Laser & Photonics Reviews

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The petawatt (PW) laser has experienced a rapid development in the past two decades, and tens of giant facilities have been constructed worldwide. After realizing 10–100 PW, it seems to be close to some sort of engineering limit but its focused peak intensity still is much lower than the Schwinger limit, and therefore some technology improvements or innovations become indispensable for further increasing the peak power as well as the focused peak intensity. By quick reviewing the development of the PW laser in history, it is shown that reducing the pulse duration to near a single optical cycle is a feasible (easy and cheap) choice for this purpose. Here, technologies for the optical‐cycle pulse generation, ultrabroadband amplification, and capability boosting that aim to provide possible approaches for optical‐cycle PW lasers are briefly reviewed and discussed. Meanwhile, key bottlenecks that challenge the current as well as the future short‐pulse PW lasers and their possible solutions are summarized and discussed. This technology review aims to provide a possible roadmap for the next‐stage development of the short‐pulse PW laser.

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Section: Bottlenecksmentioning

confidence: 99%

Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

Leng

2022

Laser & Photonics Reviews

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“…A similar measurement of PFC would differ only in the mask used. This one-shot technique is based on beamlet delay which is extracted directly from the internal structure of the far-field interference (similar to far-field slits interferometry [29,30]). For this, we use a modified beamlets selector ("PFT tool"), a mask which selects two symmetrical off-axis beamlets (see Appendix 6.4).…”

Section: Resultsmentioning

confidence: 99%

“…Similar to other spatially resolved Fourier transform techniques [27,28], it uses a small diameter central portion of the beam as a reference (reference beamlet). However, instead of spatially expanding the reference beamlet to the full beam size and comparing temporally in the near field, our method "directly" compares the reference beamlet with test beamlets in the far-field, similar to far-field slits interferometry [29,30]. It significantly reduces the complexity of the optical setup and alignment since it relies on focusing optics and focal spot imaging, which are usually already part of the optical setup.…”

Section: Far Field Beamlet Cross-correlation Stc Measurementmentioning

confidence: 99%

Spatiotemporal pulse characterization with far-field beamlet cross-correlation

Smartsev¹,

Tata²,

Liberman³

et al. 2022

Preprint

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We present a novel, straightforward method for spatiotemporal characterization of ultra-short laser pulses. The method employs far-field interferometry and inverse Fourier transform spectroscopy, built on the theoretical basis derived in this paper. It stands out in its simplicity: it requires few non-standard optical elements and simple analysis algorithms. This method was used to measure the space-time intensity of our 100 TW class laser and to test the efficacy of a refractive doublet as a suppressor of pulse front curvature (PFC). The measured low-order spatiotemporal couplings agreed with ray-tracing simulations. In addition, we demonstrate a one-shot measurement technique, derived from our central method, which allows for quick and precise alignment of the compressor by pulse front tilt (PFT) minimization and for optimal refractive doublet positioning for the suppression of PFC.

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“…There are many other examples of such 'incomplete' measurements, of varying complexity, which produce results that are not complete representations of the pulse electric field. These include interferometric measurement of radial group-delay [58,59], extensions of single-shot autocorrelation to measure pulsefront tilt [60,61,62,63] or pulse-front curvature [64], multiple-slit spatio-temporal interferometry [65,66], There are more advanced diffractive methods that can do similar analysis, using a structured diffraction grating, referred to as "chromatic diversity" [67], or a measurement of angular chirp simultaneously in both spatial dimensions [68,69]. There are also methods that are interested in only the temporal intensity profile (including the absolute intensity magnitude), for example the Temporally-Resolved Intensity Contouring (TRIC) technique [70].…”

Section: Simple or Incomplete Measurement Techniquesmentioning

confidence: 99%

Spatio-temporal characterization of ultrashort laser beams: a tutorial

Jolly,

Gobert,

Quéré

2020

Preprint

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The temporal characterization of ultrafast laser pulses has become a cornerstone capability of ultrafast optics laboratories and is routine both for optimizing laser pulse duration and designing custom fields. Beyond pure temporal characterization, spatio-temporal characterization provides a more complete measurement of the spatially-varying temporal properties of a laser pulse. These so-called spatio-temporal couplings (STCs) are generally nonseparable chromatic aberrations that can be induced by very common optical elementsfor example diffraction gratings and thick lenses or prisms made from dispersive material. In this tutorial we introduce STCs and a detailed understanding of their behavior in order to have a background knowledge, but also to inform the design of characterization devices. We then overview a broad range of spatio-temporal characterization techniques with a view to mention most techniques, but also to provide greater details on a few chosen methods. The goal is to provide a reference and a comparison of various techniques for newcomers to the field. Lastly, we discuss nuances of analysis and visualization of spatio-temporal data, which is an often underappreciated and non-trivial part of ultrafast pulse characterization.

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Arbitrarily distorted 2-dimensional pulse-front measurement and reliability analysis

Cited by 11 publications

References 34 publications

Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

Spatiotemporal pulse characterization with far-field beamlet cross-correlation

Spatio-temporal characterization of ultrashort laser beams: a tutorial

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