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Photonics
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Advancements in Fiber Lasers and Their Applications
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Advancements in Fiber Lasers 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: 30 May 2025 | Viewed by 3739

Special Issue Editors

Prof. Dr. Tianshu Wang

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Guest Editor
National and Local Joint Engineering Research Center of Space Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China
Interests: ultrafast fiber lasers; optical communication
Prof. Dr. Chunyu Guo

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Guest Editor
College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Interests: fiber lasers; optical communication
Prof. Dr. Xiaohui Li

E-Mail Website
Guest Editor
School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China
Interests: ultrashort pulsed fiber laser technology; pulsed dynamics in fibers; mid-infrared fiber lasers; optoelectronic properties of low-dimensional materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Fiber lasers, as third-generation lasers, are widely used in material processing, optical communication, fiber sensing, and other fields in recent years because of their excellent beam quality and high optical conversion efficiency. In the last decade, numerous theoretical and experimental results have been reported on the generation of mode-locked lasers, continuous high-power tunable fiber lasers, and ultrafast fiber laser communications. However, the practical application of fiber laser technology still faces many challenges, such as pulse compression and amplification technology, frequency stabilization, and noise suppression of mode-locked pulses. This Special Issue, “Advancements in Fiber Lasers and Their Applications”, welcomes fundamental methodological and applied cutting-edge research contributions. Topics include, but are not limited to, the following:

  • High-power fiber lasers;
  • Ultrafast fiber lasers;
  • Tunable fiber lasers;
  • Narrow-linewidth fiber lasers;
  • Mid-infrared fiber lasers;
  • Frequency combs;
  • Fiber laser applications.

We look forward to receiving your contributions.

Prof. Dr. Tianshu Wang
Prof. Dr. Chunyu Guo
Prof. Dr. Xiaohui Li
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

  • fiber lasers
  • optical communication
  • fiber sensing

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Published Papers (4 papers)

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Research

13 pages, 3823 KiB  
Article
Wavelength Conversion Process of Intra-Pulse Stimulated Raman Scattering in Near-Zero Negative Dispersion Range
by Bowen Chen, Silun Du, Deqi Li, Baoqun Li, Sunde Wang and Tianshu Wang
Photonics 2025, 12(2), 104; https://doi.org/10.3390/photonics12020104 - 23 Jan 2025
Viewed by 462
Abstract
In the near-zero negative dispersion region of highly nonlinear fiber, the process of wavelength conversion based on the mechanism of intra-pulse stimulated Raman scattering is sensitive to the parameters of pumping pulse and fiber length under the combined effects of nonlinearity and dispersion. [...] Read more.
In the near-zero negative dispersion region of highly nonlinear fiber, the process of wavelength conversion based on the mechanism of intra-pulse stimulated Raman scattering is sensitive to the parameters of pumping pulse and fiber length under the combined effects of nonlinearity and dispersion. Therefore, we experimentally demonstrate the process in detail by using conventional soliton pulses with three sets of pulse parameters and two highly nonlinear fiber lengths of 400 m and 500 m. The experimental results show that, under the combined action of dispersion and several types of nonlinear mechanisms, the wavelength conversion processes are apparently different when using pulses with different parameters to pump different lengths of highly nonlinear fibers. Specifically, the separation degree of the frequency-shifted pulse spectrum and pumping pulse spectrum, and the corresponding redshift rate and pump power consumption all show significantly different results. The experimental results can guide the selection of more suitable parameters for the pumping pulse and the length of highly nonlinear fiber to achieve a better effect of wavelength redshift or spectrum broadening for various practical applications. Full article
(This article belongs to the Special Issue Advancements in Fiber Lasers and Their Applications)
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7 pages, 1979 KiB  
Communication
Excess Intensity Noise in a Nonlinear Amplifying Loop-Mirror-Based Mode-Locked Laser from a Non-Reciprocal Phase Bias
by Dohyeon Kwon
Photonics 2024, 11(12), 1186; https://doi.org/10.3390/photonics11121186 - 18 Dec 2024
Viewed by 549
Abstract
We demonstrate a low-intensity-noise, nonlinear amplifying loop-mirror-based mode-locked fiber laser by optimizing the polarization of the non-reciprocal phase bias and the pump current. If the angle of the waveplate in the non-reciprocal phase bias to the polarization axis of a polarization-maintaining fiber is [...] Read more.
We demonstrate a low-intensity-noise, nonlinear amplifying loop-mirror-based mode-locked fiber laser by optimizing the polarization of the non-reciprocal phase bias and the pump current. If the angle of the waveplate in the non-reciprocal phase bias to the polarization axis of a polarization-maintaining fiber is not carefully aligned, parasitic polarization is induced. The parasitic polarization affects the minimum pump power and dynamic range of pump power for mode-locking, the intensity noise, and the comb power. To reduce intensity noise, the angle of the waveplate for the non-reciprocal phase bias is adjusted, and then the pump power is adjusted. The waveplate angle minimizing the intensity noise maximizes the dynamic range of the pump power for mode-locking and output power. As a result, the relative intensity noise has been suppressed by more than 32 dB at 15 kHz Fourier frequency. The polarization extinction ratio at the non-reciprocal phase bias is critical since it can determine a cavity loss and quality factor of a laser oscillator. Therefore, the additional polarizers cannot improve the intensity noise once the angle is mismatched and the polarization extinction ratio is degraded. Full article
(This article belongs to the Special Issue Advancements in Fiber Lasers and Their Applications)
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11 pages, 4528 KiB  
Article
Random Raman Lasing in Diode-Pumped Multi-Mode Graded-Index Fiber with Femtosecond Laser-Inscribed Random Refractive Index Structures of Various Shapes
by Alexey G. Kuznetsov, Zhibzema E. Munkueva, Alexandr V. Dostovalov, Alexey Y. Kokhanovskiy, Polina A. Elizarova, Ilya N. Nemov, Alexandr A. Revyakin, Denis S. Kharenko and Sergey A. Babin
Photonics 2024, 11(10), 981; https://doi.org/10.3390/photonics11100981 - 18 Oct 2024
Viewed by 812
Abstract
Diode-pumped multi-mode graded-index (GRIN) fiber Raman lasers provide prominent brightness enhancement both in linear and half-open cavities with random distributed feedback via natural Rayleigh backscattering. Femtosecond laser-inscribed random refractive index structures allow for the sufficient reduction in the Raman threshold by means of [...] Read more.
Diode-pumped multi-mode graded-index (GRIN) fiber Raman lasers provide prominent brightness enhancement both in linear and half-open cavities with random distributed feedback via natural Rayleigh backscattering. Femtosecond laser-inscribed random refractive index structures allow for the sufficient reduction in the Raman threshold by means of Rayleigh backscattering signal enhancement by +50 + 66 dB relative to the intrinsic fiber level. At the same time, they offer an opportunity to generate Stokes beams with a shape close to fundamental transverse mode (LP01), as well as to select higher-order modes such as LP11 with a near-1D longitudinal random structure shifted off the fiber axis. Further development of the inscription technology includes the fabrication of 3D ring-shaped random structures using a spatial light modulator (SLM) in a 100/140 μm GRIN multi-mode fiber. This allows for the generation of a multi-mode diode-pumped GRIN fiber random Raman laser at 976 nm with a ring-shaped output beam at a relatively low pumping threshold (~160 W), demonstrated for the first time to our knowledge. Full article
(This article belongs to the Special Issue Advancements in Fiber Lasers and Their Applications)
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12 pages, 5941 KiB  
Article
Boundary Feedback Fiber Random Microcavity Laser Based on Disordered Cladding Structures
by Hongyang Zhu, Bingquan Zhao, Zhi Liu, Zhen He, Lihong Dong, Hongyu Gao and Xiaoming Zhao
Photonics 2024, 11(5), 467; https://doi.org/10.3390/photonics11050467 - 16 May 2024
Viewed by 1356
Abstract
The cavity form of complex microcavity lasers predominantly relies on disordered structures, whether found in nature or artificially prepared. These structures, characterized by disorder, facilitate random lasing through the feedback effect of the cavity boundary and the internal scattering medium via various mechanisms. [...] Read more.
The cavity form of complex microcavity lasers predominantly relies on disordered structures, whether found in nature or artificially prepared. These structures, characterized by disorder, facilitate random lasing through the feedback effect of the cavity boundary and the internal scattering medium via various mechanisms. In this paper, we report on a random fiber laser employing a disordered scattering cladding medium affixed to the inner cladding of a hollow-core fiber. The internal flowing liquid gain establishes a stable liquid-core waveguide environment, enabling long-term directional coupling output for random laser emission. Through theoretical analysis and experimental validation, we demonstrate that controlling the disorder at the cavity boundary allows liquid-core fiber random microcavities to exhibit random lasing output with different mechanisms. This provides a broad platform for in-depth research into the generation and control of complex microcavity lasers, as well as the detection of scattered matter within micro- and nanostructures. Full article
(This article belongs to the Special Issue Advancements in Fiber Lasers and Their Applications)
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