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Photonics
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Novel Applications of Solid-State Laser and Future Prospects
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Novel Applications of Solid-State Laser and Future Prospects

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Lasers, Light Sources and Sensors".

Deadline for manuscript submissions: closed (20 February 2023) | Viewed by 3969

Special Issue Editor

Dr. Juna Sathian

E-Mail Website
Guest Editor
Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne, UK
Interests: solid-state light sources; high-brightness luminescent concentrators; laser; maser; diamond NV-color center; optical spectroscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will cover all new advancements in solid-state lasers, which play an essential role in many fields in science, industry, and daily life. Laser sources with flexible wavelengths and pulse capabilities will provide significant improvements in the science and performance of many applications.

We invite researchers to contribute to this Special Issue, entitled Novel Applications of Solid-State Laser and Future Prospects, which is intended to serve as a multidisciplinary forum covering broad aspects of the advancements in the science and technology of solid-state lasers for improved power, efficiency, brightness, stability, wavelength coverage, pulse width, cost and environmental impact. Articles can include recent advances in both material and source aspects of solid-state lasers. Material aspects include new laser gain media and its characterization and resonator components, while energy, power, and brightness scaling are among the key areas in terms of advances in sources, which include lasers as well as other high-brightness pump sources for solid-state lasers. This Special Issue will feature original research articles as well as reviews.

Dr. Juna Sathian
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • laser crystals
  • rod lasers
  • slab lasers
  • resonator
  • diode pumping
  • LED pumping
  • high-brightness pump sources
  • saturable absorbers
  • damage threshold
  • wavelength tuning
  • single-frequency operation
  • Q switching

Published Papers (3 papers)

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Research

14 pages, 8243 KiB  
Article
946/1030 nm Dual-Wavelength Laguerre-Gaussian (LG01) Mode Vortex Laser Based on Intracavity Cascade Pumped Resonator
by Yashuai Yang, Yongliang Li, Chi Wang and Chao Yang
Photonics 2023, 10(4), 441; https://doi.org/10.3390/photonics10040441 - 12 Apr 2023
Viewed by 1044
Abstract
In this paper, the 946/1030 nm dual-wavelength LG01 mode vortex laser is obtained by applying the intracavity cascade pumped structure and annular-beam end-pumped method, an innovative and pioneering exploration of the transverse mode of the dual-wavelength laser. First, we demonstrate the oscillation [...] Read more.
In this paper, the 946/1030 nm dual-wavelength LG01 mode vortex laser is obtained by applying the intracavity cascade pumped structure and annular-beam end-pumped method, an innovative and pioneering exploration of the transverse mode of the dual-wavelength laser. First, we demonstrate the oscillation characteristic theoretical model of the dual-wavelength LG01 mode laser, considering the reabsorption effect. Then the length of the laser crystal and the transmittance of the output mirror are simulated and analyzed, respectively, related to the oscillation characteristics of the 946 and 1030 nm LG01 mode vortex lasers. Finally, a 946/1030 nm LG01 mode vortex laser with the same handedness is successfully achieved in our experiment. With 20 W of annular-beam pump power, the output power of 946 and 1030 nm LG01 mode vortex lasers is 0.404 and 0.510 W, the slope efficiency is 3.6% and 6.2%, and the total optical-optical conversion efficiency is 4.6%. At the maximum output power, the fluctuations of output power within 1 h are 4.02% and 4.23%, and the beam quality factors M2 are 2.32 and 2.27, respectively, for 946 and 1030 nm LG01 mode vortex lasers. The wavefront phase exp(iϕ) of the 946/1030 nm dual-wavelength is also proved by the self-interference method. Full article
(This article belongs to the Special Issue Novel Applications of Solid-State Laser and Future Prospects)
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10 pages, 1709 KiB  
Communication
Wavelength Effects on the Reflectivity of Niobium by Solid-State Laser Pulses
by Olena Benavides, Lelio de la Cruz May, Aaron Flores Gil and Efrain Mejia Beltran
Photonics 2023, 10(4), 402; https://doi.org/10.3390/photonics10040402 - 03 Apr 2023
Viewed by 1107
Abstract
This study utilized solid-state lasers with a 50 ns pulse duration in a Q-switched mode of operation at wavelengths of 1.06 µm and 0.69 µm to investigate the hemispherical reflectivity of niobium. Our experimental results show that the reflectivity of niobium decreases notably [...] Read more.
This study utilized solid-state lasers with a 50 ns pulse duration in a Q-switched mode of operation at wavelengths of 1.06 µm and 0.69 µm to investigate the hemispherical reflectivity of niobium. Our experimental results show that the reflectivity of niobium decreases notably as the laser fluence increases towards the plasma formation threshold for ablation at both studied wavelengths, which we attribute to changes in the absorptivity of the surface resulting from plasma formation. We also observed a significant effect of laser wavelength on the reflectivity values of the sample at low laser fluence. By determining the threshold fluence values for each wavelength, we estimated the surface temperature associated with the threshold fluence for plasma formation. Our calculations revealed discrepancies between published values for optically polished and mechanically polished niobium, which we suggest may be due to the presence of nano/micro defects, oxide films, and contaminants that amplify the wavelength-dependent effects on reflectivity. These findings have important implications for the design of optical components and laser processing techniques that use niobium, as well as for the development of accurate models of laser-material interactions. Further research is needed to fully understand the underlying mechanisms driving the observed effects and to explore potential applications of niobium in laser-based technologies. Full article
(This article belongs to the Special Issue Novel Applications of Solid-State Laser and Future Prospects)
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20 pages, 16085 KiB  
Article
Comparative Performance Analysis of Femtosecond-Laser-Written Diode-Pumped Pr:LiLuF4 Visible Waveguide Lasers
by Davide Baiocco, Ignacio Lopez-Quintas, Javier R. Vázquez de Aldana, Mauro Tonelli and Alessandro Tredicucci
Photonics 2023, 10(4), 377; https://doi.org/10.3390/photonics10040377 - 29 Mar 2023
Cited by 1 | Viewed by 1411
Abstract
In this work, we present the operation of a femtosecond-laser-written diode-pumped visible waveguide laser based on praseodymium-doped lithium lutetium fluoride. The refractive index modification induced by the femtosecond laser in the crystal exhibits an anisotropic behavior, thus enabling the fabrication of different types [...] Read more.
In this work, we present the operation of a femtosecond-laser-written diode-pumped visible waveguide laser based on praseodymium-doped lithium lutetium fluoride. The refractive index modification induced by the femtosecond laser in the crystal exhibits an anisotropic behavior, thus enabling the fabrication of different types of waveguides from single-track structures to stress-induced waveguides and depressed cladding structures. All the waveguides were characterized by realizing transmission measurements and the waveguide design was optimized to obtain extremely low propagation losses, equal to 0.12 dB/cm. Lasing has been achieved at 604 nm and 721 nm from different waveguides. In addition, stable continuous-wave lasing at 698 nm has been obtained in a depressed cladding waveguide. This wavelength corresponds to the one needed for the transition of the atomic clock based on the neutral strontium atom. In the end, we report the observation of laser emission at 645 nm from a depressed cladding waveguide. Full article
(This article belongs to the Special Issue Novel Applications of Solid-State Laser and Future Prospects)
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