Article
Optics
Xiuqi Wu, Junsong Peng, Sonia Boscolo, Ying Zhang, Christophe Finot, Heping Zeng
Summary: Generating pulse from an ultrafast laser is challenging task that involves adjusting multiple control parameters. Machine-learning tools have shown potential for designing smart lasers. The use of evolutionary algorithms for self-optimization of breather regime in fiber lasers opens up a new avenue for exploration and optimization of complex dynamics in nonlinear systems.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Konstantin K. Bobkov, Egor K. Mikhailov, Tatyana S. Zaushitsyna, Andrey A. Rybaltovsky, Svetlana S. Aleshkina, Mikhail A. Melkumov, Mikhail M. Bubnov, Denis S. Lipatov, Mikhail V. Yashkov, Alexey N. Abramov, Andrey A. Umnikov, Alexey N. Guryanov, Mikhail E. Likhachev
Summary: This study systematically investigates silica-based optical fibers with an ultra-high Yb concentration. The factors limiting the increase of Yb content in glasses and fibers are revealed, and it is shown for the first time that highly Yb-doped fibers can nearly completely lose their active properties due to concentration quenching of luminescence.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Jingcheng Shang, Shengzhi Zhao, Yizhou Liu, Yuefeng Zhao, Yuzhi Song, Tao Li, Tianli Feng
Summary: We propose a design roadmap for a high repetition rate Tm-doped ultrafast fiber laser, which has been confirmed by theoretical simulation and experimental verification. The laser operates in both continuous wave and mode-locking modes, with a wide tunable wavelength range and high average power.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Jian-Cheng Zheng, Song Yang, Zhi-Wei Zhu, Kuen-Yao Lau, Li Li
Summary: We demonstrated an all-fiber Er-doped Mamyshev oscillator with short pulse duration and high peak power. Stable ultrafast laser pulses were directly obtained from the device without extra compression through dispersion management technique and sufficient nonlinear phase shift accumulation.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
N. K. Thipparapu, Shaiful Alam, Yu Wang, S. Pidishety, David J. Richardson, Jayanta K. Sahu
Summary: An all-fiber actively mode-locked Bismuth-doped fiber laser based on an acousto-optic modulator is proposed, which can achieve higher harmonic mode-locking and wavelength tuning. The laser has high output power and stability.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Huihui Cheng, Wei Lin, Yu Zhang, Min Jiang, Wei Luo
Summary: This study focuses on the pulse instability in GHz repetition-rate thulium-doped fiber laser by using a combined physical model incorporating rate equations and nonlinear Schrodinger equation. Two pulsating regimes are predicted, and a novel pulse instability in continuous wave mode locking is revealed, providing reliable guidance for designing high repetition rate mode-locked fiber lasers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Jinhwa Gene, Dong-Il Yeom, Seung Kwan Kim, Sun Do Lim
Summary: The study introduces a high-energy, low-frequency 2-micron femtosecond fiber laser designed for laser surgery and vehicle laser detection and ranging applications. The laser, incorporating thulium-doped fiber gains and hybrid mode-locking techniques, achieved the highest pulse energy and lowest pulse rate reported to date, with pulse duration and output optical spectrum characteristics also evaluated for stability over extended periods.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yaping Liu, Zhiqun Yang, Xutao Wang, Yongmin Jung, Lin Zhang
Summary: This paper proposes a new design for few-mode erbium-doped fiber amplifiers (FM-EDFAs) that achieves significantly reduced differential modal gain (DMG) through strong mode coupling. A new numerical model based on a fiber transfer matrix is used to systematically investigate the DMGs of FM-EDFAs and analyze two different types of six-mode fiber amplifiers as exemplar demonstrations.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Electrical & Electronic
Huihui Cheng, Kefeng Chen, Yingge Tao, Weilin Shao
Summary: This study demonstrates the existence of dissipative solitons in centimeter-scale fiber lasers and presents a general method for constructing dissipative solitons in short-length fiber lasers. The pulse stabilization mediated by the dissipative system improves long-term stability and is validated in terms of spectral and temporal domains.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xuan Wang, Chuanfei Yao, Pingxue Li, Linjing Yang, Guochuan Ren, Yongjing Wu, Chao Wang
Summary: High power all-fiber supercontinuum generation in the 2 to 3 μm range was achieved using germania-doped fiber pumped by a thulium-doped fiber amplifier. The high-power spectral broadening mechanism was investigated theoretically, setting a record for power in this region.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Optics
Yixuan Zhu, Chao Zeng, Zhiwen He, Qun Gao, Huaqiang Wang, Yueqing Du, Dong Mao
Summary: This paper demonstrates ultrafast Er-doped large-mode-area (LMA) fiber lasers in the all-anomalous-dispersion regime, achieving stable and chirp-free solitons with the assistance of a homemade carbon nanotube saturable absorber. The universality of all-anomalous-dispersion mode-locking is validated by incorporating an all-fiber saturable absorber based on nonlinear multimode interference effect, which also generates chirp-free solitons. The numerical simulation reveals that the dispersion consistency of fibers in the laser cavity is beneficial for generating stable and chirp-free solitons even at an ultrahigh output coupling ratio (OCR).
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Shaodong Hou, Zhijian Ma, Jinzhang Wang, Min Zhang, Peiguang Yan
Summary: This study presents a compact and high-performance all-fiber Tm-doped mode-locked fiber laser using a novel integrated fiber coupler. The laser configuration was simplified by utilizing a unique fiber component functioning as a WDM, OC, and optical modulator simultaneously. The constructed laser demonstrated fundamental solitons with a short pulse width and high repetition rate, along with confirmed short-term and long-term stability through noise analysis and running tests.
JOURNAL OF LUMINESCENCE
(2022)
Article
Engineering, Electrical & Electronic
Haifeng Hu, Zhuo Chen, Qian Cao, Qiwen Zhan
Summary: In this article, a wavelength-tunable and OAM-switchable ultrafast fiber laser is demonstrated, which can emit vortex beam outputs with a topological charge of l = +1 or l = -1 and the center wavelength can be continuously tuned. The obtained output pulse has a high pulse energy and a compressed pulse duration. This laser can emit OAM-switchable output with a shorter pulse duration and a broad wavelength tuning range, providing potential for more sophisticated and customizable laser outputs by adding polarization control elements.
IEEE PHOTONICS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Bo Fu, Chenghong Zhang, Pan Wang, Marcello Condorelli, Mario Pulvirenti, Enza Fazio, Ce Shang, Jing Li, Yan Li, Giuseppe Compagnini, Vittorio Scardaci
Summary: Metal nanomaterials, particularly Ag nanoplates, have been utilized as saturable absorber candidates in Yb-doped all-fiber lasers, demonstrating dual-wavelength synchronous mode-locking. The nonlinear optical properties of AgNPTs-based SA and the potential applications for stable and low-cost pulsed laser sources have been highlighted in this study. Achieving 293-ps pulse trains with a repetition rate of 11.43 MHz at a pump power of 350 mW indicates the promising prospects of solution-processed AgNPTs in ultrafast photonics.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Katarzyna Krupa, Tomasz M. Kardas, Yuriy Stepanenko
Summary: This study demonstrates the real-time observation of double-Hopf-type breathers in an erbium-doped fiber laser and discusses their possible explanation. It provides important insights for understanding laser physics and optimizing fiber cavity design.
LASER & PHOTONICS REVIEWS
(2022)
Article
Multidisciplinary Sciences
Dorota Tomaszewska-Rolla, Robert Lindberg, Valdas Pasiskevicius, Fredrik Laurell, Grzegorz Sobon
Summary: In this study, we experimentally demonstrate the nonlinear evolution of femtosecond seed pulses in a Yb-fiber amplifier and highlight the importance of temperature in the spectral output of the pulses. Additionally, we measure the relative intensity noise of the amplifier operating in the gain-managed nonlinear regime.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Philipp Steinleitner, Nathalie Nagl, Maciej Kowalczyk, Jinwei Zhang, Vladimir Pervak, Christina Hofer, Arkadiusz Hudzikowski, Jaroslaw Sotor, Alexander Weigel, Ferenc Krausz, Ka Fai Mak
Summary: By cascaded intrapulse difference-frequency generation, a continuously adjustable single-cycle infrared pulse is achieved and multi-octave single-cycle infrared pulses are obtained in the mid-infrared spectral range. Sub-cycle field control in this wavelength range has potential applications in launching and controlling few-femtosecond electron/hole wavepackets in low-gap materials, expanding bandwidth of electronic signal processing, and electric-field-resolved molecular fingerprinting of biological systems.
Article
Biochemical Research Methods
Dorota Stachowiak, Marcin Marzejon, Jakub Boguslawski, Zbigniew Laszczych, Katarzyna Komar, Maciej Wojtkowski, Grzegorz Sobon
Summary: We report the development of a widely-tunable femtosecond fiber laser system and its application for two-photon vision studies. The system offers efficient and safe two-photon stimulation and can be used for measuring the two-photon scotopic spectral sensitivity in humans.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Optics
Zbigniew Laszczych, Grzegorz Sobon
Summary: We conducted an experimental investigation on a figure-nine-based Er-doped all-polarization-maintaining fiber laser and observed three different states of operation depending on the pumping power and the net cavity dispersion values. Our findings show that pulses at the reject port can offer comparable performance to those at the output port in certain operating states.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Karolina Stefanska, Sylwia Majchrowska, Karolina Gemza, Grzegorz Sobon, Jaroslaw Sotor, Pawel Mergo, Karol Tarnowski, Tadeusz Martynkien
Summary: This paper reports on the generation of trapped pulses in birefringent photonic crystal fiber. Linearly polarized ultrashort pulses are injected into the fiber in an anomalous dispersion regime. It is observed that a soliton pulse polarized along the fast fiber axis partially transfers its energy to the orthogonal polarization, and the generated pulse is amplified through the orthogonal Raman gain. The experimental results are consistent with numerical simulations, and they are important for applications using self-frequency shifted solitons that require high polarization purity.
Article
Optics
Matthias Germann, Adrian Hjalten, Vincent Boudon, Cyril Richard, Karol Krzempek, Arkadiusz Hudzikowski, Aleksander Gluszek, Grzegorz Sobon, Aleksandra Foltynowicz
Summary: In this study, a Fourier transform spectrometer was used to measure high-resolution spectra of methane under low-pressure and room-temperature conditions. The obtained line positions and intensities provide valuable data for studying the spectrum of methane isotopologues.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2022)
Article
Chemistry, Multidisciplinary
Zbigniew Laszczych, Mikolaj Krakowski, Grzegorz Sobon
Summary: This study presents a research on pulse dynamics in figure-nine Tm-doped all-polarization maintaining fiber laser. The transition from multi-pulse to single-pulse operation was achieved by decreasing the pump power, and thorough characterization of the laser was performed in both states.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Olga Szewczyk, Zbigniew Laszczych, Grzegorz Sobon
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Alicja Kwasny, Jakub Boguslawski, Grzegorz Sobon
Summary: A multiphoton scanning laser microscope based on a femtosecond frequency-doubled erbium-doped fiber laser is presented. The microscope setup generated 95 fs pulses at 780 nm wavelength with an average power of 44.3 mW and a pulse repetition rate of 100 MHz. The imaging process was controlled by custom software developed in the NI LabVIEW environment. Two-photon fluorescence detection was proven by acquiring a series of images from various biological samples.
PHOTONICS LETTERS OF POLAND
(2022)
Meeting Abstract
Ophthalmology
Grazyna Palczewska, Jakub Boguslawski, Michal Dabrowski, Dorota Stachowiak, Grzegorz Sobon, Krzysztof Palczewski, Maciej Wojtkowski
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2022)
Meeting Abstract
Ophthalmology
Marcin Marzejon, Agnieszka Zielinska, Dorota Stachowiak, Grzegorz Sobon, Maciej Wojtkowski, Katarzyna Komar
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2022)
Article
Medicine, Research & Experimental
Jakub Boguslawski, Grazyna Palczewska, Slawomir Tomczewski, Jadwiga Milkiewicz, Piotr Kasprzycki, Dorota Stachowiak, Katarzyna Komar, Marcin J. Marzejon, Bartosz L. Sikorski, Arkadiusz Hudzikowski, Aleksander Gluszek, Zbigniew Laszczych, Karol Karnowski, Grzegorz Sobon, Krzysztof Palczewski, Maciej Wojtkowski
Summary: Researchers have developed a new method for noninvasive metabolic assessment of the human retina. Using a compact 2-photon-excited fluorescence scanning laser ophthalmoscope and near-infrared light, they were able to obtain spectrally resolved images of the human retina. This approach provides the possibility of monitoring eye diseases in the earliest stages before structural damage occurs to the retina.
JOURNAL OF CLINICAL INVESTIGATION
(2022)
