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Thulium-Doped Fiber Lasers—Advances and Applications

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A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 8201

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Special Issue Editor

Dr. Maria Michalska

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Guest Editor

Institute of Optoelectronics, Military University of Technology in Warsaw, PL-00908 Warsaw, Poland
Interests: fiber lasers and amplifiers; mode-locked fiber lasers; supercontinuum generation

Special Issue Information

Dear Colleagues,

We are inviting submissions to this Special Issue on “Thulium-Doped Fiber Lasers—Advances and Applications”.

Thulium-doped fiber lasers (TDFLs) have received great attention during recent decades, finding a wide spectrum of applications. In particular, the number of demonstrations of TDFLs generated at a wavelength range of 2 µm has increased rapidly in recent years. The gain bandwidth of Tm³⁺-doped silica fibers, ranging from 1.8 to 2.1 µm, makes TDFLs one of the most promising sources of mid-infrared coherent radiation for various applications, including medicine, spectroscopy, remote sensing, material processing, and frequency conversion. Due to the broadband gain bandwidth, thulium-doped fibers are also an excellent choice for an active medium in mode-locked fiber lasers and the generation of ultrashort pulses. Medical applications, especially soft-tissue surgery, can benefit from TDFLs operating at ~1.94 µm because of strong tissue absorption at this wavelength. The long-range propagation of laser radiation in the atmospheric transmission window around 2 µm can be address by using high-power, diode-pumped TDFLs. However, our topics of interest are not only limited to fiber lasers operating in the 2 µm spectral region, and reports on TDFLs utilizing other laser transitions are also invited.

This Special Issue of the Applied Sciences journal, “Thulium-Doped Fiber Lasers—Advances and Applications”, aims to present recent advances in the development of thulium-doped fiber lasers—different laser setups and generation regimes, including ultrafast mode-locked fiber lasers as well as high-power continuous-wave (CW) lasers, new designs of thulium-doped fibers, and their applications.

Dr. Maria Michalska
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. Applied Sciences is an international peer-reviewed open access semimonthly 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

thulium-doped fiber
fiber laser
mode-locked fiber laser
Q-switched fiber laser
high-power fiber laser
fiber laser application

Published Papers (4 papers)

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Editorial

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2 pages, 186 KiB

Open AccessEditorial

Foreword to the Special Issue on Thulium-Doped Fiber Lasers

by Maria Michalska

Appl. Sci. 2022, 12(21), 11267; https://doi.org/10.3390/app122111267 - 7 Nov 2022

Cited by 1 | Viewed by 1245

Abstract

Fiber laser sources operating in the 2 µm wavelength region have gained extensive attention due to their wide range of applications, including in medicine, remote sensing, spectroscopy, plastic material processing, and mid-infrared generation [...] Full article

(This article belongs to the Special Issue Thulium-Doped Fiber Lasers—Advances and Applications)

Research

Jump to: Editorial

8 pages, 1553 KiB

Open AccessArticle

Long- and Short-Term Stability of All Polarization-Maintaining Thulium Doped Passively Mode-Locked Fiber Lasers with Emission Wavelengths at 1.95 μm and 2.07 μm

by Christian Cuadrado-Laborde, Jose L. Cruz, Antonio Díez and Miguel V. Andrés

Appl. Sci. 2023, 13(3), 1981; https://doi.org/10.3390/app13031981 - 3 Feb 2023

Viewed by 1271

Abstract

In this work, we compare the operation of a passively modelocked polarization-maintaining emission in two thulium-doped fiber lasers pumped at 1561 nm, with emission at wavelengths of 1.951 μm in one case and 2.07 μm in the other. We obtained a sequence of light pulses at 15.6 MHz, whose temporal width was 81 ps at 1.95 μm, and a sequence of light pulses at 13.1 MHz, whose temporal width was 94 ps at 2.07 μm. Finally, we also measured the long-term stability of this setup during a 24-h operation, as well as the short-term stability in a simulated harsh environment. The results confirm the superior performance of fiber laser systems with a fully polarization-maintaining design. Full article

(This article belongs to the Special Issue Thulium-Doped Fiber Lasers—Advances and Applications)

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12 pages, 2384 KiB

Open AccessFeature PaperArticle

Dispersion-Managed Tm-Ho Co-Doped Ultrashort Pulse Fiber Laser Using Single-Walled Carbon Nanotube and Spectral Filter

by Keisuke Fukazawa, Ying Zhou, Shotaro Kitajima, Takeshi Saito, Youichi Sakakibara and Norihiko Nishizawa

Appl. Sci. 2022, 12(23), 12369; https://doi.org/10.3390/app122312369 - 2 Dec 2022

Cited by 1 | Viewed by 1421

Abstract

In this paper, we have demonstrated a dispersion-managed, high-power, Tm-Ho co-doped ultrashort pulse fiber laser using a single walled carbon nanotube (SWNT) dispersed in polyimide film. An in-line type spectral filter was developed to control the output pulse spectra. Two SWNT films with different modulation depths were examined as a mode-locker. Normal dispersion fiber was used in the fiber laser oscillator, and dependence on net cavity dispersion was investigated. Passive mode-locking was achieved in a wide dispersion range, from −0.319 to +0.101 ps². Stable soliton mode-locking operation and dissipative soliton mode-locking operations were observed. The pumping efficiency was ~3 times higher than that in a Tm-doped fiber laser with a similar configuration. The developed fiber laser showed self-start and stable operations, and this laser is useful for practical applications. Full article

(This article belongs to the Special Issue Thulium-Doped Fiber Lasers—Advances and Applications)

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12 pages, 3010 KiB

Open AccessArticle

Mode-Locking Dynamics in an All-PM Figure-Nine Tm-Doped Fiber Laser

by Zbigniew Łaszczych, Mikołaj Krakowski and Grzegorz Soboń

Appl. Sci. 2022, 12(20), 10613; https://doi.org/10.3390/app122010613 - 20 Oct 2022

Cited by 3 | Viewed by 2662

Abstract

We report a study on pulse dynamics in figure-nine Tm-doped all-polarization maintaining fiber laser. We analyzed laser operation from self-starting with multi-pulse dynamic to single-pulse operation by decreasing the pump power from the mode-locking threshold. By choosing a reliable setting of waveplates, our laser was generating pulses at the central wavelength of 1985 nm with a half-width of the spectrum, pulse duration, and pulse energy equal 6.4 nm, 650 fs, 177 pJ for the output port and 19.2 nm, 1279 fs, 57 pJ for the reject port in the single-pulse state. In the multi-pulse state, we recorded optical spectra, temporal waveforms, and average power at both exit ports. By analyzing temporal traces and output to reject port ratio power, we can distinguish between eight states of operation which follow an exact pattern. In the case of the single-pulse regime, we performed a further laser characterization, including relative intensity noise. Full article

(This article belongs to the Special Issue Thulium-Doped Fiber Lasers—Advances and Applications)

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