Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
2.3
2.4
Journals
Photonics
Special Issues
Narrow Linewidth Laser Sources and Their Applications
share announcement

Narrow Linewidth Laser Sources and Their 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 August 2024 | Viewed by 4899

Special Issue Editors

Dr. Shijie Fu

E-Mail Website
Guest Editor
School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, China
Interests: fiber lasers; optical fiber devices; single-frequency laser sources
Prof. Dr. Huadong Lu

E-Mail Website
Guest Editor
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Collaborative Innovation Center of Extreme Optics, Institute of Opto-electronics, Shanxi University, Taiyuan 030006, China
Interests: all-solid-state single-frequency lasers; tunable lasers; quantum optics devices

Special Issue Information

Dear Colleagues,

Since the demonstration of the first ruby laser by Theodore H. Maiman in 1960, lasers have seen tremendous development. Due to their superior spectral coherence, laser sources with a narrow linewidth have found widespread applications in a range of areas, from fundamental physical research to biomedical diagnosis to military defense. With the development of advanced laser materials, devices and techniques, laser linewidth has been significantly narrowed to a level of mHz in recent years. Narrow-linewidth lasers can now be obtained with almost all prevalent laser techniques. The improved performance of these laser sources, accompanied by their output power, operation wavelength and systematical stability, has attracted sustained attention.

This Special Issue invites manuscripts detailing the latest advances in “narrow linewidth laser sources and their applications”. Theoretical, numerical and experimental papers are welcome. Topics of interest include, but are not limited to, the following:

  • Physics of laser linewidth broadening;
  • Narrow-linewidth laser oscillators;
  • High-power narrow-linewidth laser amplifiers;
  • Novel laser linewidth narrowing techniques;
  • Laser linewidth characterization techniques;
  • Applications of narrow-linewidth laser sources.

Prof. Dr. Shijie Fu
Prof. Dr. Huadong Lu
Guest Editors

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
  • narrow-linewidth laser
  • laser application

Published Papers (5 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review

16 pages, 4790 KiB  
Article
Design and Analysis of a Narrow Linewidth Laser Based on a Triple Euler Gradient Resonant Ring
by Yikai Wang, Boxia Yan, Mi Zhou, Chenxi Sun, Yan Qi, Yanwei Wang, Yuanyuan Fan and Qian Wang
Photonics 2024, 11(5), 412; https://doi.org/10.3390/photonics11050412 - 29 Apr 2024
Viewed by 314
Abstract
We designed a narrow-linewidth external-cavity hybrid laser leveraging a silicon-on-insulator triple Euler gradient resonant ring. The laser’s outer cavity incorporates a compact, high-Q resonant ring with low loss. The straight waveguide part of the resonant ring adopts a width of 1.6 μm to [...] Read more.
We designed a narrow-linewidth external-cavity hybrid laser leveraging a silicon-on-insulator triple Euler gradient resonant ring. The laser’s outer cavity incorporates a compact, high-Q resonant ring with low loss. The straight waveguide part of the resonant ring adopts a width of 1.6 μm to ensure low loss transmission. The curved section is designed as an Euler gradient curved waveguide, which is beneficial for low loss and stable single-mode transmission. The design features an effective bending radius of only 26.35 μm, which significantly improves the compactness of the resonant ring and, in turn, reduces the overall footprint of the outer cavity chip. To bolster the laser power and cater to the varying shapes of semiconductor optical amplifier (SOA) spots, we designed a multi-tip edge coupler. Theoretical analysis indicates that this edge coupler can achieve an optical coupling efficiency of 85%. It also reveals that the edge coupler provides 3 dB vertical and horizontal alignment tolerances of 0.76 μm and 2.4 μm, respectively, for a spot with a beam waist radius of 1.98 μm × 0.99 μm. The outer cavity, designed with an Euler gradient micro-ring, can achieve a side-mode suppression ratio (SMSR) of 30 dB within a tuning range of 100 nm, with a round-trip loss of the entire cavity at 1.12 dB, and an expected theoretical laser linewidth of 300 Hz. Full article
(This article belongs to the Special Issue Narrow Linewidth Laser Sources and Their Applications)
►▼ Show Figures

Figure 1

10 pages, 10743 KiB  
Communication
Narrow Linewidth 510 nm Laser via Single-Pass Frequency-Tripling by Waveguide PPLNs
by Yanlin Chen, Jing Zhang, Xiaolang Qiu, Suo Wang, Chuanchuan Li, Haiyang Yu and Xin Wei
Photonics 2024, 11(3), 269; https://doi.org/10.3390/photonics11030269 - 18 Mar 2024
Viewed by 703
Abstract
A single-frequency narrow linewidth green laser at 510 nm is a vital component for the study of Cesium Rydberg atoms. Here, we demonstrate a 510 nm laser based on single-pass second-harmonic generation (SHG) and sum-frequency generation (SFG) via waveguide Periodically Poled Lithium Niobate [...] Read more.
A single-frequency narrow linewidth green laser at 510 nm is a vital component for the study of Cesium Rydberg atoms. Here, we demonstrate a 510 nm laser based on single-pass second-harmonic generation (SHG) and sum-frequency generation (SFG) via waveguide Periodically Poled Lithium Niobate (PPLN) seeded with a common C-band laser (1530 nm). The final linewidth measured using the delayed self-heterodyne method reaches a narrow linewidth of 4.8 kHz. And, the optical-to-optical conversion efficiency is up to 13.1% and reaches an output power up to 200 mW. Full article
(This article belongs to the Special Issue Narrow Linewidth Laser Sources and Their Applications)
►▼ Show Figures

Figure 1

15 pages, 5005 KiB  
Article
382 mW External-Cavity Frequency Doubling 461 nm Laser Based on Quasi-Phase Matching
by Yingxin Chen, Guodong Zhao, Wei Tan and Hong Chang
Photonics 2024, 11(1), 40; https://doi.org/10.3390/photonics11010040 - 30 Dec 2023
Viewed by 977
Abstract
To rapidly improve strontium optical clocks, a high-power, high-efficiency, and high-beam-quality 461 nm laser is required. In blue lasers based on periodically poled KTiOPO4 crystals, the optical absorption in the crystals can induce thermal effects, which must be considered in the design [...] Read more.
To rapidly improve strontium optical clocks, a high-power, high-efficiency, and high-beam-quality 461 nm laser is required. In blue lasers based on periodically poled KTiOPO4 crystals, the optical absorption in the crystals can induce thermal effects, which must be considered in the design of high-efficiency external-cavity frequency doubling lasers. The interdependence between the absorption and the thermally induced quasi-phase mismatch was taken into account for the solution to the coupled wave equations. By incorporating multilayer crystal approximation, a theoretical model was developed to accurately determine the absorption of the frequency doubling laser. Based on experimental parameters, the temperature gradient in the crystal, the influence of the boundary temperature on the conversion efficiency, and the focal length of the thermal lens were simulated. Theoretical calculations were employed to optimize the parameters of the external-cavity frequency doubling experiment. In the experiment, in a bow-tie external cavity was demonstrated by pumping a 10 mm long periodically poled KTiOPO4 crystal with a 922 nm laser, a 461 nm laser with a maximum output power of 382 mW. The conversion efficiency of the incident fundamental laser was 66.2%. The M2 factor of the frequency doubling beam was approximately 1.4. Full article
(This article belongs to the Special Issue Narrow Linewidth Laser Sources and Their Applications)
►▼ Show Figures

Figure 1

11 pages, 3522 KiB  
Article
Theoretical Analysis of Thermal Distribution and Waveform Evolution in Pulsed Ytterbium-Doped Fiber Amplifier with Extra Feedback
by Xiaolei Bai, Xuening Chen, Chuan Tian and Meng Wang
Photonics 2023, 10(4), 437; https://doi.org/10.3390/photonics10040437 - 12 Apr 2023
Viewed by 1100
Abstract
Pulsed ytterbium-doped fiber amplifiers (YDFA) with ns-level signal width are important devices for obtaining high-power pulsed lasers. When some components in the amplifier are ineffective, e.g., the isolator or fiber is damaged, extra feedback light is generated and coupled into the gain fiber. [...] Read more.
Pulsed ytterbium-doped fiber amplifiers (YDFA) with ns-level signal width are important devices for obtaining high-power pulsed lasers. When some components in the amplifier are ineffective, e.g., the isolator or fiber is damaged, extra feedback light is generated and coupled into the gain fiber. The dynamic thermal distribution and waveform evolution of amplifiers with extra continuous-wave (CW) or pulse-wave (PW) feedback are theoretically analyzed in this work. The CW feedback can not only reduce the gain of the amplifier but can also change the thermal distribution of the gain fiber, while the PW feedback can reduce the leading or trailing edge of the output pulse by 3–4 ns, depending on the direction of the feedback light transmission. The theoretical analysis provides a reference for optimizing the thermal management and the fault diagnosis of a typical fiber amplifier with an output of several tens of watts. Full article
(This article belongs to the Special Issue Narrow Linewidth Laser Sources and Their Applications)
►▼ Show Figures

Figure 1

Review

Jump to: Research

16 pages, 4801 KiB  
Review
A Review of Progress about Birefringent Filter Design and Application in Ti:sapphire Laser
by Jiao Wei, Jing Su, Huadong Lu and Kunchi Peng
Photonics 2023, 10(11), 1217; https://doi.org/10.3390/photonics10111217 - 31 Oct 2023
Cited by 1 | Viewed by 1170
Abstract
All-solid-state tunable lasers have been widely used in many fields including multi-photon microscopy, time-resolved photoluminescence, atomic physics, and so on owing to their broadband output spectrum range, good beam quality, and low noise. To cover the broad fluorescent line of the laser crystal [...] Read more.
All-solid-state tunable lasers have been widely used in many fields including multi-photon microscopy, time-resolved photoluminescence, atomic physics, and so on owing to their broadband output spectrum range, good beam quality, and low noise. To cover the broad fluorescent line of the laser crystal as much as possible, a birefringent filter (BRF) is always the most popular candidate for acting as a tuning element. In this review, the tuning characteristics of BRF and the design rule as well as its progress in practical application are summarized. Especially, it is worth noting that laser crystal itself begins to act as the BRF for wavelength tuning except for its gain characteristic, which has paved a new way for developing a kind of novel tunable laser. We believe that this review will not only provide a valuable reference for the design of BRF but also lay the foundation for developing a new application of BRF. Full article
(This article belongs to the Special Issue Narrow Linewidth Laser Sources and Their Applications)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop