High Power Lasers: Technology and Applications

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (20 October 2024) | Viewed by 1721

Special Issue Editor


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Guest Editor
School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China
Interests: optics; laser technology (photoelectric detection; target recognition; coherent optical communication; high-power laser; photoelectric imaging and artificial intelligence image processing)
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Special Issue Information

Dear Colleagues,

High-power lasers, which are used in many optical systems, cover the basics and realization of, as well as materials for, high-power laser systems and high-power radiation interactions with matter. The physical and technical fundamentals of high-intensity laser optics and adaptive optics, and the related physical processes in high-intensity laser systems, are explained.

This Special Issue seeks to uncover the underlying science and engineering in the fields of high-energy density physics, high-power lasers, and advanced laser technology, applications, and laser components. Specifically, papers dealing with laser–plasma interactions, ultra-intense pulse laser interactions with matter, attosecond physics, laser design, modeling, and optimization, laser amplifiers, nonlinear optics, laser engineering, optical materials, optical devices, fiber lasers, diode-pumped solid-state lasers and excimer lasers, etc., are solicited. Researchers are invited to submit their contributions to this Special Issue. Topics include, but are not limited to, the following:

  • High-power laser systems.
  • High-power radiation interactions with matter.
  • Laser welding.
  • Laser beam characterization and measurement of laser beam parameters.
  • Materials for high-power lasers.
  • Laser–material interactions.
  • High-speed imaging.
  • Thermal lensing and optic design approaches.

Dr. Changqing Cao
Guest Editor

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Keywords

  • high-power laser systems
  • high-power radiation interaction with matter
  • laser beam characterization and measurement
  • optic design

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Published Papers (2 papers)

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Research

13 pages, 396 KiB  
Article
Direct Acceleration of an Electron Beam with a Radially Polarized Long-Wave Infrared Laser
by William H. Li, Igor V. Pogorelsky and Mark A. Palmer
Photonics 2024, 11(11), 1066; https://doi.org/10.3390/photonics11111066 - 14 Nov 2024
Viewed by 561
Abstract
Direct laser acceleration with radially polarized lasers is an intriguing variant of laser-based particle acceleration that has the potential of offering GeV/cm-level energy while avoiding the instabilities and complex beam dynamics associated with plasma wakefield accelerators. A major limiting factor is the difficulty [...] Read more.
Direct laser acceleration with radially polarized lasers is an intriguing variant of laser-based particle acceleration that has the potential of offering GeV/cm-level energy while avoiding the instabilities and complex beam dynamics associated with plasma wakefield accelerators. A major limiting factor is the difficulty of generating high-power radially polarized beams. In this paper, we propose the use of CO2-based long-wave infrared (LWIR) lasers as a driver for direct laser acceleration, as the polarization insensitivity of the gain medium allows a radially polarized beam to be amplified. Additionally, the larger waist sizes, Rayleigh lengths, and pulse lengths associated with the long wavelength could improve the injection efficiency of the electron beam. By comparing acceleration simulations using a near-infrared laser and an LWIR laser, we show that the injection efficiency is indeed improved by up to an order of magnitude with the longer wavelength. Furthermore, we show that even sub-TW peak powers with an LWIR laser can provide MeV-level energy gains. Thus, radially polarized LWIR lasers show significant promise as a driver of a direct laser-driven demonstration accelerator. Full article
(This article belongs to the Special Issue High Power Lasers: Technology and Applications)
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7 pages, 2613 KiB  
Communication
High-Power External Spatial Beam Combining of 7-Channel Quantum Cascade Lasers Emitting at ~8.5 μm
by Haibo Dong, Xuyan Zhou, Man Hu, Yuan Ma, Aiyi Qi, Weiqiao Zhang and Wanhua Zheng
Photonics 2024, 11(6), 513; https://doi.org/10.3390/photonics11060513 - 27 May 2024
Viewed by 766
Abstract
Based on the demand for high-power output, a spatial beam combining 7-channel quantum cascade lasers (QCLs) is demonstrated in this paper. A “2 + 3 + 2” stepped structure is designed to convert the seven beam spots into a circular arrangement. An aspherical [...] Read more.
Based on the demand for high-power output, a spatial beam combining 7-channel quantum cascade lasers (QCLs) is demonstrated in this paper. A “2 + 3 + 2” stepped structure is designed to convert the seven beam spots into a circular arrangement. An aspherical lens with a large numerical aperture (NA) of 0.85 and a focal length of 1.873 mm is used in each single QCL for collimation, and seven reflectors are utilized in the 7-channel QCLs combined in the spatial beam. After combining the spatial beam, the maximum continuous output power of the system is 3.6 W, and the beam quality M2 is 5.59 in the fast axis and 8.3 in the slow axis, respectively. Full article
(This article belongs to the Special Issue High Power Lasers: Technology and Applications)
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