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Photonics
Special Issues
Laser Technology and Applications
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Laser Technology and Applications

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

Deadline for manuscript submissions: 10 December 2024 | Viewed by 2339

Special Issue Editor

Dr. Li Zhong

E-Mail Website
Guest Editor
Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Interests: high power semiconductor laser; special pump light source; solid-state laser

Special Issue Information

Dear Colleagues,

Laser technology is one of the great achievements of the 20th century. Over the past 50 years, due to the rapid development of laser technology and applications, significant breakthroughs have been made in basic scientific research such as laser cooling, semiconductor lasers, optical frequency combs, laser interference gravitational wave detection, chirped pulse amplification, and optical tweezers. At the same time, a series of new interdisciplinary and technological applications have been raised by laser technology, including laser spectroscopy, laser chemistry, quantum optics, ultrafast photonics, nonlinear optics, laser medicine and biophotonics, information optoelectronics, laser advanced manufacturing technology, laser controlled nuclear fusion technology and so on.

At present, laser technology is still one of the most promising frontier technologies and has a wide range of applications in industrial manufacturing, scientific research, precision measurement and military defense, etc. New laser light sources are generally developing towards higher power, higher brightness, higher speed, higher pulse energy, shorter pulse width, narrower line width, and wider wavelength range (extreme ultraviolet and mid-infrared wavelengths). The rapid development and wide application of next-generation laser technology will be based on cutting-edge breakthroughs in new laser materials and devices. Researchers are invited to submit their contributions to this Special Issue. Topics include, but are not limited to:

  • High-power laser
  • High-brightness laser
  • Ultrashort pulse laser
  • Attosecond laser technology
  • Narrow linewidth
  • Single-frequency laser
  • Frequency combs
  • Ultraviolet laser
  • Mid-infrared laser
  • Semiconductor lasers

Dr. Li Zhong
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

  • high-power laser
  • high-brightness laser
  • ultrashort pulse laser
  • attosecond laser technology
  • narrow linewidth
  • single-frequency laser
  • frequency combs
  • ultraviolet laser
  • mid-infrared laser
  • semiconductor lasers

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

13 pages, 10590 KiB  
Article
Simplified 1.5 μm Distributed Feedback Semiconductor Laser (DFB-LD) Frequency Stabilization System Based on Gas Absorption Chamber
by Ju Wang, Ye Gao, Jinlong Yu, Ziheng Cai, Hao Luo and Chuang Ma
Photonics 2024, 11(7), 621; https://doi.org/10.3390/photonics11070621 - 28 Jun 2024
Viewed by 434
Abstract
The classical 1.5 μm band frequency-stabilized laser using acetylene gas saturated absorption can achieve high frequency stability and reproducibility, but its system design is complex and bulky. For some practical applications, a simple, compact system containing anti-interference abilities is preferred. In this [...] Read more.
The classical 1.5 μm band frequency-stabilized laser using acetylene gas saturated absorption can achieve high frequency stability and reproducibility, but its system design is complex and bulky. For some practical applications, a simple, compact system containing anti-interference abilities is preferred. In this study, a low-cost and simple-structured 1.5 μm frequency-stabilized laser is constructed using digital control methods, wavelength modulation technology, and acetylene gas absorption. The fiber input and output optical devices of the system significantly simplify the optical path and reduce the volume of the system. The error signal is obtained by the first-order differential method, and a combination of the high-speed comparator circuit and the microcontroller unit (MCU) is used to detect the error signal. Through the feedback control method of coarse temperature adjustment and fine current adjustment, the second-level frequency stability of the laser is stabilized within 100 kHz, that is, the frequency stability reaches 10​−10. The designed system achieved continuous and stable operation for more than 6 h, and the long-term frequency stability reached 10​−9. Full article
(This article belongs to the Special Issue Laser Technology and Applications)
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9 pages, 249 KiB  
Article
Few ns Pulse Duration of Gain-Switched Ho:YAG Laser Pumped by an Active Q-Switched Tm:YLF Laser
by Shaul Avichai Golan, Rotem Nahear, Yechiel Bach and Salman Noach
Photonics 2024, 11(6), 572; https://doi.org/10.3390/photonics11060572 - 18 Jun 2024
Viewed by 495
Abstract
This paper describes a gain-switched Ho:YAG laser that emitted at 2089 nm, driven by an actively Q-switched Tm:YLF laser as the pumping source. The laser attained few ns short pulse durations with high energies at controlled repetition rates due to the active Q-switch [...] Read more.
This paper describes a gain-switched Ho:YAG laser that emitted at 2089 nm, driven by an actively Q-switched Tm:YLF laser as the pumping source. The laser attained few ns short pulse durations with high energies at controlled repetition rates due to the active Q-switch pump source. Using the gain-switch method, stable short pulse durations ranging from 3.5 to 7.2 ns, with an energy per pulse of 0.4 to 0.52 mJ, were achieved at repetition rates of up to 2.5 kHz. This design can have significant advantages in various fields, where accuracy in the repetition rate is essential and a passive Q-switch cannot be implemented due to its accuracy limitations, including sensing, LIDAR, medical procedures, and material processing. Full article
(This article belongs to the Special Issue Laser Technology and Applications)
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10 pages, 2111 KiB  
Article
Analysis of Plasma Dynamics in He-Ne Lasers with Different Gas Ratios
by Yuanhao Mao, Jing Hu, Hongteng Ji, Shiyu Guan, Dingbo Chen, Qiucheng Gong, Wei Liu, Xingwu Long and Zhongqi Tan
Photonics 2024, 11(3), 276; https://doi.org/10.3390/photonics11030276 - 21 Mar 2024
Viewed by 1034
Abstract
He-Ne lasers play a crucial role in ultra-precision measurement and optical sensing across various fields. For many applications based on He-Ne lasers, a higher output power is required to enhance the accuracy and signal-to-noise ratios of the associated optical measurements. However, conventional methods [...] Read more.
He-Ne lasers play a crucial role in ultra-precision measurement and optical sensing across various fields. For many applications based on He-Ne lasers, a higher output power is required to enhance the accuracy and signal-to-noise ratios of the associated optical measurements. However, conventional methods to increase the output power by reducing the diameter of the He-Ne laser discharge capillary inevitably result in higher diffraction losses and constrain the lasing performance. Here, we propose an approach to enhance laser pumping efficiency and output power through optimizing the ratios of He and Ne gasses. The validity of our proposal has been confirmed by both numerical simulations of He-Ne laser plasma discharge processes and experimental demonstrations, showing that the optimal gas ratio increases with the capillary diameter and total gas pressure. Full article
(This article belongs to the Special Issue Laser Technology and Applications)
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