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Photonics
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A Recent Progress in Single Frequency Lasers: Development and Applications
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A Recent Progress in Single Frequency Lasers: Development 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: closed (20 December 2023) | Viewed by 6333

Special Issue Editor

Dr. Mikhail I. Skvortsov

E-Mail Website
Guest Editor
Institute of Automation and Electrometry IAE, Novosibirsk, Russia
Interests: fiber optics

Special Issue Information

Dear Colleagues,

Thanks to such characteristics as single-frequency generation, accurate wavelength selection, narrow linewidth, low intensity and frequency noises, and high efficiency, single-frequency fiber lasers (SFFLs) are attractive in many areas, e.g., remote sensing, reflectometry, spectroscopy, and second harmonic generation in visible range.  This class of lasers is implemented in many configurations, from compact lasers based on ordered distributed feedback in the form of fiber Bragg gratings with a phase shift, made in active fibers, to multikilometer random lasers based on feedback with natural or artificial Rayleigh reflectors. This has become possible due to, among others, the development of the technique of point-by-point femtosecond writing of various structures from high-Q cavities with a physical length of an order of several millimeters to random structures with lengths up to a kilometer. Additionally, the creation of highly doped fibers with a low concentration of clusters facilitates the fabrication of cavities with short resonators, which makes it possible to effectively filter longitudinal modes and achieve single-frequency generation.

This Special Issue on "Single-Frequency Fiber Lasers and Their Applications" will welcome fundamental, experimental, and applied cutting-edge research in the form of both regular and review articles, concerning:

  • Single-frequency fiber lasers;
  • Techniques for characterizing single-frequency radiation;
  • Production of special fiber light guides;
  • Sensory applications of single-frequency radiation sources;
  • Reflectometry.

Dr. Mikhail Skvortsov
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

  • fiber optics
  • single frequency laser
  • fiber Bragg grating
  • highly doped fiber
  • point-by-point inscription technology by femtosecond pulses
  • sensors
  • reflectometry
  • telecommunication

Published Papers (6 papers)

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Research

9 pages, 8519 KiB  
Communication
Single-Frequency Ring Fiber Laser with Random Distributed Feedback Provided by Artificial Rayleigh Scattering
by Mikhail I. Skvortsov, Kseniya V. Proskurina, Evgeniy V. Golikov, Alexander V. Dostovalov, Alexey A. Wolf, Zhibzema E. Munkueva, Sofia R. Abdullina, Vadim S. Terentyev, Olga N. Egorova, Sergey L. Semjonov and Sergey A. Babin
Photonics 2024, 11(2), 103; https://doi.org/10.3390/photonics11020103 - 23 Jan 2024
Viewed by 1008
Abstract
Femtosecond (fs) laser inscription technology allows for the production of in-fiber disordered structures with an enhanced level of Rayleigh backscattering with relatively few induced losses. These properties enable the application of these structures as reflectors in fiber lasers. In this study, a narrow-linewidth [...] Read more.
Femtosecond (fs) laser inscription technology allows for the production of in-fiber disordered structures with an enhanced level of Rayleigh backscattering with relatively few induced losses. These properties enable the application of these structures as reflectors in fiber lasers. In this study, a narrow-linewidth erbium fiber laser with random distributed feedback provided by a fs-induced random structure in a ring cavity configuration was developed. A single-frequency regime was observed over the entire lasing power range. At a maximum output power of 7.8 mW, the linewidth did not exceed 0.75 kHz. Full article
(This article belongs to the Special Issue A Recent Progress in Single Frequency Lasers: Development and Applications)
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9 pages, 2547 KiB  
Communication
Fine Structure of High-Energy Pulses from a Stimulated Brillouin Scattering-Assisted Q-Switch Tm-Doped Fiber Laser
by Vladimir A. Kamynin, Serafima A. Filatova, Timur I. Mullanurov, Maksim D. Cheban, Alexey A. Wolf, Dmitry A. Korobko, Andrei A. Fotiadi and Vladimir B. Tsvetkov
Photonics 2024, 11(1), 30; https://doi.org/10.3390/photonics11010030 - 29 Dec 2023
Viewed by 1002
Abstract
We have demonstrated a simple all-fiber thulium (Tm) laser Q-switched by stimulated Brillouin scattering (SBS). The maximum output pulse energy was 80 μJ. This allowed us to generate a broadband spectrum directly at the laser outputs. For the first time, we measured the [...] Read more.
We have demonstrated a simple all-fiber thulium (Tm) laser Q-switched by stimulated Brillouin scattering (SBS). The maximum output pulse energy was 80 μJ. This allowed us to generate a broadband spectrum directly at the laser outputs. For the first time, we measured the fine structure of the output pulses with a resolution of less than 100 ps. It was found that the SBS Q-switched laser is capable of generating bunches of picosecond pulses. The effect of modulation instability on the pulse decay is discussed. The potential application of the investigated laser radiation for producing destructive effects on soft biological tissues has been demonstrated. Full article
(This article belongs to the Special Issue A Recent Progress in Single Frequency Lasers: Development and Applications)
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10 pages, 1583 KiB  
Article
Generation of Narrow Modes in Random Raman Fiber Laser Based on Multimode Fiber
by Ilya D. Vatnik, Oleg A. Gorbunov and Dmitry V. Churkin
Photonics 2024, 11(1), 2; https://doi.org/10.3390/photonics11010002 - 19 Dec 2023
Viewed by 942
Abstract
We present a new design of a random Raman fiber laser based on a graded-index multimode fiber as the media composing the cavity that allows the generation of narrow spectral lines. We carried out spectral measurements using an optical heterodyning technique by projecting [...] Read more.
We present a new design of a random Raman fiber laser based on a graded-index multimode fiber as the media composing the cavity that allows the generation of narrow spectral lines. We carried out spectral measurements using an optical heterodyning technique by projecting multimode radiation onto the fundamental mode of a standard single-mode fiber. The measurements confirmed the presence of localized ultra-narrow short-lived modes. We measured the powers of the modes and found it to be significantly higher (up to 25 mW) compared with those in a random Raman laser based on a single-mode fiber (<2 mW), while preserving the same typical lifetimes of a few milliseconds. Full article
(This article belongs to the Special Issue A Recent Progress in Single Frequency Lasers: Development and Applications)
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13 pages, 3463 KiB  
Article
Characterization of Laser Frequency Stability by Using Phase-Sensitive Optical Time-Domain Reflectometry
by Danil M. Bengalskii, Danil R. Kharasov, Edgard A. Fomiryakov, Sergei P. Nikitin, Oleg E. Nanii and Vladimir N. Treshchikov
Photonics 2023, 10(11), 1234; https://doi.org/10.3390/photonics10111234 - 4 Nov 2023
Viewed by 1298
Abstract
A new method to measure laser phase noise and frequency stability based on the phase-sensitive optical time-domain reflectometry is proposed. In this method, the laser under test is utilized in a phase-sensitive optical time-domain reflectometer, which employs phase-modulated dual pulses and acts as [...] Read more.
A new method to measure laser phase noise and frequency stability based on the phase-sensitive optical time-domain reflectometry is proposed. In this method, the laser under test is utilized in a phase-sensitive optical time-domain reflectometer, which employs phase-modulated dual pulses and acts as an optical frequency discriminator: laser frequency fluctuations are deduced from the analysis of the reflectometer data corresponded to phase fluctuations along the vibration-damped and thermally insulated fiber spool. The measurement results were validated by comparison with direct optical heterodyning of the tested and more coherent reference lasers. The use of dual pulses generated by an acousto-optic modulator makes it easy to adjust the time delay during measurements, which distinguishes favorably the proposed method from standard optical frequency discriminators. The method is suitable for testing highly coherent lasers and qualifying their parameters such as linear drift rate, random frequency walk rate, white frequency noise (which is directly related to laser instantaneous linewidth), and flicker noise level. Full article
(This article belongs to the Special Issue A Recent Progress in Single Frequency Lasers: Development and Applications)
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7 pages, 1042 KiB  
Communication
Implementation or Suppression of the Collective Lasing of the Laser Channels at the Intracavity Spectral Beam Combining
by Vladimir A. Kamynin, Vitalii V. Kashin, Dmitri A. Nikolaev and Vladimir B. Tsvetkov
Photonics 2023, 10(9), 1022; https://doi.org/10.3390/photonics10091022 - 7 Sep 2023
Cited by 1 | Viewed by 843
Abstract
The spectral and spatial output parameters of a two-channel, Yb-doped fiber laser operating in the intracavity spectral beam combining mode were investigated. We showed that by using active media with slightly different gain spectra, it is possible to implement either the spectral combining [...] Read more.
The spectral and spatial output parameters of a two-channel, Yb-doped fiber laser operating in the intracavity spectral beam combining mode were investigated. We showed that by using active media with slightly different gain spectra, it is possible to implement either the spectral combining mode of the independent laser channels or the mode of collective lasing of the channels. The difference in the gain spectra of the active media was realized due to the difference in the threshold inverse population in the Yb-doped fibers. Full article
(This article belongs to the Special Issue A Recent Progress in Single Frequency Lasers: Development and Applications)
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11 pages, 2557 KiB  
Article
Mode Selection Method in Spherical Optical Cavities with Thin Metal Film
by Vadim Terentyev and Victor Simonov
Photonics 2023, 10(7), 789; https://doi.org/10.3390/photonics10070789 - 7 Jul 2023
Viewed by 690
Abstract
A new method for the selection of the radial modes of a spherical microresonator by the quality factor, based on the effect of absorption in a thin metal film deposited on a sphere together with a dielectric layer, is proposed. The method was [...] Read more.
A new method for the selection of the radial modes of a spherical microresonator by the quality factor, based on the effect of absorption in a thin metal film deposited on a sphere together with a dielectric layer, is proposed. The method was proved by numerical simulation on the example of the second and third radial modes TEl,l,q, l = 455, q = 2, 3 selection in 80 μm radius quartz microsphere with 5 nm thick nickel film. The structure of the metal-dielectric coating was determined using analytical formulas in such a way that the metal film was placed at the node of the selected mode E-field distribution. The finite element method was used to refine the calculation, optimizing the position of the film in terms of obtaining the maximum quality factor. As a result, it was shown that the selected mode could have a relatively high quality factor (Q~107), while the other radial modes are significantly suppressed (Q~103). In addition, it is shown that selection is carried out by the mode index number (l) simultaneously with selection by the radial index. Full article
(This article belongs to the Special Issue A Recent Progress in Single Frequency Lasers: Development and Applications)
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