Spatiotemporal coupling investigations for Ti:sapphire-based multi-PW lasers

Zou, J-P; Coïc, Hervé; Papadopoulos, Dimitris N.

doi:10.1017/hpl.2021.62

Cited by 9 publications

(4 citation statements)

References 26 publications

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“…[ 329 ] Besides, some other forms of the spatiotemporal/‐spectral coupling distortion throughout a CPA or OPCPA short‐pulse TW/PW laser recently have been studied and introduced. [ 330–333 ] Fortunately, up to now, lots of spatiotemporal measurement methods have been invented by many groups, [ 334–354 ] especially single‐shot ones, [ 355–358 ] which can be directly applied to completely reconstruct the optical field in space–time and then to observe this complex distortion.…”

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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“…It consists of a motorized linear translation stage, some high-quality uncoated wedges, and high-reflective mirrors [9]. After the EAM, an achromatic telescope is installed to avoid the damage of compression gratings while not causing pulse front distortion [41,42]. Lastly, the amplified seed pulses with a beam size of around 150 mm are injected into a four-grating compressor.…”

Section: Design Of the Sub-15 Fs Pw Lasermentioning

confidence: 99%

A Promising Route to Compact and Economic Sub-15 fs, PW-Level Ti:Sapphire Lasers

Wu,

Hu,

Zhang

et al. 2024

Photonics

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In quest of achieving compact and economic PW-level Ti:Sapphire (Ti:sa) lasers with a sub-15 fs pulse duration, a modified hybrid amplification scheme, which combines the optical parametric chirped pulse amplifier (OPCPA) and the chirped pulse amplifier (CPA), is presented and numerically investigated in this paper. The key characteristic of this scheme is that the conventional Ti:sa regenerative amplifier and preamplifier are replaced by a dual-crystal OPCPA front-end, which is spectrally matched with the upstream seed source and the downstream Ti:sa amplifiers and, therefore, can realize a broader spectrum. Moreover, some useful laser techniques are also applied to suppress the spectral gain narrowing and redshift in the Ti:sa CPA chain and to control the residual dispersion in the laser system. This way, fewer amplification stages and pump lasers are required to reach PW-level peak power compared with traditional all-CPA Ti:sa lasers. Numerical results indicate that pulse energy and spectral bandwidth can reach up to ∼22 J and ∼125 nm at full width at half maximum (FWHM), respectively, only by employing three-stage amplifiers. After compression, PW-level lasers with a ∼13.3 fs pulse duration are expected. This work can offer a promising route for the development of compact and economic PW-level Ti:sa lasers.

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“…Figure 2d,e show the experimental results of the beam-smoothing effect using the asymmetric four-grating compressor configuration in a Ti:sapphire PW laser [25,26]. A 2 mm-wide paper strip is placed directly before the asymmetric four-grating compressor, which is used to induce strong LSIM to the input laser beam due to the diffraction effect.…”

Section: Beam Smoothing In the Near Fieldmentioning

confidence: 99%

Multistage Smoothing Compressor for Multistep Pulse Compressors

Shen

Liang

et al. 2023

Applied Sciences

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Ultrahigh peak-power lasers are important scientific tools for frontier laser physics research, in which both the peak power improvement and operating safety are very important. Based on spatial-chirp-induced beam smoothing in both the near field and far field, a multistage-smoothing-based multistep pulse compressor (MS-MPC) is proposed here to further improve safety and operating convenience. In the MS-MPC, beam smoothing is not simply executed in the pre-compressor or main compressor but is separated into multiple stages. As a result, important and expensive optics are directly protected in every stage. The prism-pair-based pre-compressor induces a small spatial chirp, making it both easier to achieve than the previous multistep pulse compressor and sufficient to protect the first grating directly. Furthermore, the asymmetric four-grating compressor, which serves as the main compressor, induces a spatial chirp that further smooths the laser beam, protecting the last grating. In this way, a 10 s to 100 s petawatt laser pulse can be compressed with a single laser beam using the currently available optics. Additionally, an extra beam-smoothing stage can be added before the main amplifier to safeguard the largest amplification crystal from damage. The MS-MPC can be easily integrated into all existing PW laser facilities to improve their potential compressed pulse energy and operational safety.

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Spatiotemporal coupling investigations for Ti:sapphire-based multi-PW lasers

Cited by 9 publications

References 26 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

A Promising Route to Compact and Economic Sub-15 fs, PW-Level Ti:Sapphire Lasers

Multistage Smoothing Compressor for Multistep Pulse Compressors

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