Article
Engineering, Electrical & Electronic
Qun Gao, Yueqing Du, Zhiwen He, Dong Mao, Jianlin Zhao
Summary: This study demonstrates a hybrid-structure fiber laser consisting of SMF and FMF, capable of delivering stable near-chirp-free solitons for various applications. The experimental results validate the superior performance of the laser and highlight its significant research potential.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
I Armas-Rivera, L. A. Rodriguez-Morales, M. Duran-Sanchez, B. Ibarra-Escamilla
Summary: By using double-twist fiber, dual-wavelength emission can be achieved and both circular and linear birefringence can be cancelled out, while single-twist fiber only allows for single-wavelength emission due to large circular birefringence.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Sen Wang, Renlai Zhou, Zhenyu Duan, Guanqu Hu, Shenzhi Yuan, Li Li, K. Nakkeeran
Summary: We numerically investigate the effects of small-signal gain, intracavity dispersion, and spectral filtering on the generation and evolution of spectral sidebands in mode-locked fiber lasers. Increasing small-signal gain shifts the spectral sidebands towards the central wavelength with enhanced intensities and leads to spectral distortion and soliton pulsation. The wavelength location and intensity of the sidebands can be manipulated by varying the intracavity dispersion. Spectral filtering affects soliton pulse formation through insertion loss and spectral narrowing, thus influencing the properties of the soliton pulses. Experimental results of our mode-locked fiber laser are consistent with simulation results from extended vector nonlinear Schrodinger equations.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Optics
Junsong Peng, Zihan Zhao, Sonia Boscolo, Christophe Finot, Srikanth Sugavanam, Dmitry Churkin, Heping Zeng
Summary: This study observed different types of breather complexes in a mode-locked fiber laser, with intermolecular temporal separation reaching several hundreds of picoseconds, indicating long-range interactions. This opens the possibility of studying the dynamics of many-body systems where breathers are the elementary constituents.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Song Yang, Jiancheng Zheng, Yaoyao Qi, Yiwen Shi, Diao Li, Xuchen Nie, Zhipei Sun
Summary: In this study, a compact pulse width tunable fiber laser is reported by utilizing the combination effect of spectral filtering and gain management. The pulse width can be adjusted at a fixed repetition rate by tuning the bandwidth and pump strength, which could have potential applications in fields such as optical sensing and biomedical imaging.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jianing Tao, Yuanqi Song, Yangyang Li, Xuzhuo Jia, Lei Hou, Baole Lu, Jintao Bai
Summary: We report a mode-locked fiber laser based on the nonlinear amplifying loop mirror (NALM) that can output different types of pulses and has tunable spectral bandwidth and switchable pulse type.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Shaokang Bai, Yaqiong Lu, Zuxing Zhang
Summary: In this paper, a method combining FM-FBG and AOMC is proposed to achieve narrow linewidth mode-locked pulse output with adjustable transverse mode and wavelength in a fiber laser. The results of experiments show that by adjusting the acoustic frequency in AOMC, the wavelength of mode-locked pulses can be switched and mode conversion can be achieved. This laser may find applications in mode-division multiplexing systems.
CHINESE OPTICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Honggang Sun, Lixin Wang, Jinhai Zou, Qiujun Ruan, Yu Ding, Chuchu Dong, Zhipeng Dong, Zhengqian Luo
Summary: We report the first visible-wavelength all-fiber passively mode-locked vortex laser, capable of delivering picosecond optical vortex pulses with adjustable pulse duration and narrow linewidth. This study also demonstrates the potential applications of this technology in particle trapping, optical tweezers, and high-resolution microscopy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Zihao Zhao, Lei Jin, Sze Yun Set, Shinji Yamashita
Summary: In this experiment, we demonstrated a broadband similariton generated by compensating dispersion in a mode-locked Yb-doped fiber laser. By pushing the net dispersion to its limit and fully utilizing the gain bandwidth, the widest spectrum was achieved. The experimental observations agreed well with the numerical simulation. We believe our study provides a practical approach for designing broadband mode-locked fiber lasers.
Review
Optics
Kuen Yao Lau, Xiaofeng Liu, Jianrong Qiu
Summary: MXenes are a new class of two-dimensional materials with huge potential in photonics, electronics, and energy fields. Recent studies have shown that MXenes can replace traditional saturable absorbers, exhibiting high saturable absorption, flexible modulation ability, and high electron density. This review summarizes the synthesis and characterization of MXene, focusing on its nonlinear saturable absorption and its application as a saturable absorber in mode-locked fiber lasers.
LASER & PHOTONICS REVIEWS
(2022)
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
Optics
Xiaohui Ma, Zhengxiong Zhang, Wenhui Jiang, Liang Tong, Shaoqing Liu, Wenwen Dai, Wu Chen, Yong Zhou, Wei Zhang, Jihong Qiu, Meisong Liao, Weiqing Gao
Summary: In this study, tin selenide nanoparticles were utilized as a saturable absorber in a passively mode-locked thulium-doped fiber laser for the first time, producing mode-locked pulses with excellent performance. The results demonstrate the wide potential applications of tin selenide in ultrafast photonics in the mid-infrared waveband.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Kangjun Zhao, Xiaosheng Xiao, Changxi Yang
Summary: This paper numerically investigates the soliton dynamics in mode-locked fiber lasers based on sinusoidal spectral filtering (SSF). It is found that SSF can facilitate the formation of dual-wavelength mode locking and generate dual-comb solitons with slightly different group velocities. Moreover, pulse shaping based on SSF and gain filtering leads to a non-monotonic relationship between the group velocity difference of the solitons and the cavity gain. Additionally, dual-comb soliton mode locking exhibits a threshold feature and multi-pulse instability.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Xu-Bin Lin, Yu-Xin Gao, Jin-Gan Long, Jia-Wen Wu, Wei-Yi Hong, Hu Cui, Zhi-Chao Luo, Wen-Cheng Xu, Ai-Ping Luo
Summary: This study introduces an all few-mode fiber figure-eight laser STML by a nonlinear amplifying loop mirror at 1.0 μm, capable of generating single and multiple pulses at different central wavelengths. Various types of bound-state solitons were also achieved, contributing to a better understanding of the nonlinear characteristics of STML fiber lasers and their potential applications in optical communications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
XinXin Shang, NanNan Xu, Jia Guo, Shuo Sun, HuaNian Zhang, S. Wageh, Ahmed A. Al-Ghamdi, Han Zhang, DengWang Li
Summary: In this study, a NbTe2-based saturable absorber was used in an erbium-doped fiber to achieve mode-locking and generate a vector soliton. The nonlinear optical properties of NbTe2 were revealed and its applications in ultrafast photonic devices were expanded.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Engineering, Electrical & Electronic
Qiang Wu, Lei Gao, Shuai Qiu, Stefan Wabnitz, Ai Liu, Yulong Cao, Zhenghu Chang, Yuanjie Yu, Yu Long, Tao Zhu
Summary: In this paper, an all-optical polarization scrambler configuration based on a polarization beam splitting delayed fiber loop is proposed. The polarization scrambler operates in a chaotic regime by deteriorating the coherence of one beam and controlling the intensity ratio of two orthogonal beams. The effect of loop structure on polarization scrambling is tested using a narrow-linewidth laser and a commercial distributed feedback laser, and the dependence of scrambling speed and average degree of polarization on delay fiber length and wavelengths within the C-band is characterized. The performance of the proposed scrambler for scrambling modulated signals at 40 MHz and 6 GHz is also tested.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Mario Ferraro, Fabio Mangini, Yann Leventoux, Alessandro Tonello, Mario Zitelli, Tigran Mansuryan, Yifan Sun, Sebastien Fevrier, Katarzyna Krupa, Denis Kharenko, Stefan Wabnitz, Vincent Couderc
Summary: We introduce and demonstrate all-optical beam switching in graded-index multimode optical fibers. Nonlinear coupling between orthogonally polarized seed and signal beams allows control of the spatial beam quality at the fiber output. We show that a low power control beam can significantly enhance the quality of a high-power multimode signal beam. This concept could be applied in high-power beam delivery and fiber lasers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Qiang Wu, Lei Gao, Yulong Cao, Stefan Wabnitz, Zhenghu Chang, Ai Liu, Jingsheng Huang, Ligang Huang, Tao Zhu
Summary: This study presents a method for single-shot, wavelength-resolved measurement of the state of polarization (SOP) of ultrafast laser pulses. It utilizes chromatic dispersion to time-stretch the pulses and map spectral information into a temporal waveform. By calibrating with different wavelengths, wavelength-resolved SOP measurements are achieved, allowing for detailed analysis of complex wavelength-dependent polarization dynamics. This method opens up possibilities for intelligent control and further investigations in polarization-related optical signal processing.
PHOTONICS RESEARCH
(2023)
Article
Optics
Mario Zitelli, Vincent Couderc, Mario Ferraro, Fabio Mangini, Pedro Parra-Rivas, Yifan Sun, Stefan Wabnitz
Summary: We developed a spatiotemporal mode decomposition technique to analyze the power distribution of ultrashort pulses in graded-index multimode fibers. Our findings reveal that the power content of beam modes in the dispersive pulse propagation regime follows the Bose-Einstein law, which is a result of power diffusion from mode coupling. In the soliton regime, the output mode power distribution approaches the Rayleigh-Jeans law.
PHOTONICS RESEARCH
(2023)
Article
Physics, Multidisciplinary
Tobias Hansson, Pedro Parra-Rivas, Stefan Wabnitz
Summary: Researchers developed a model to study the application of frequency combs in the infrared and visible spectral regions, and identified conditions for the existence of two distinct and coexisting cavity solitons.
COMMUNICATIONS PHYSICS
(2023)
Article
Optics
Francesco Rinaldo Talenti, Yifan Sun, Pedro Parra-Rivas, Tobias Hansson, Stefan Wabnitz
Summary: The impact of chirped driving fields on Kerr cavity breathers and solitons is investigated, and it is found that synchronous phase and amplitude modulation of the pumping field can be used to control soliton dynamics. The use of a phase-modulated super-Gaussian pump is shown to stabilize the oscillations of breathing solitons and generate prescribed temporal intra-cavity patterns. These findings have applications in deterministic generation of optical frequency soliton combs, optical tweezers, and all-optical manipulation of light pulses.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Yifan Sun, Stefan Wabnitz, Pedro Parra-Rivas
Summary: This study investigates the dynamics of Kerr cavity solitons with intracavity phase modulation in the normal dispersion regime. The introduction of a parabolic potential leads to multimode resonances, which facilitate the formation of high-order bright solitons. Gradually decreasing the potential strength causes the bright solitons to transition into dark solitons. This process is described as a shift from multimode resonance to collapsed snaking bifurcation structure. This work provides a comprehensive overview of cavity dynamics and offers a potential pathway to access multi-stable states by varying the phase modulation effectively.
Article
Optics
Fabio Mangini, Mario Ferraro, Alessandro Tonello, Vincent Couderc, Stefan Wabnitz
Summary: In our experiments, we discover a previously unnoticed power limitation in beam self-cleaning in graded-index nonlinear multimode optical fibers. As the optical pulse power increases, the initial improvement of spatial beam quality is lost due to high-temperature wave thermalization, depleting the fundamental mode and leading to a highly multimode power distribution.
Article
Physics, Multidisciplinary
Yifan Sun, Pedro Parra-Rivas, Carles Milian, Yaroslav Kartashov, Mario Ferraro, Fabio Mangini, Raphael Jauberteau, Francesco R. Talenti, Stefan Wabnitz
Summary: This study presents a general approach to exciting stable dissipative three-dimensional and high-order solitons and breathers in passively driven nonlinear cavities. A paradigmatic example is used to illustrate the findings, showing that three-dimensional solitons or light bullets are the only stable states that exist under specific parameters. This rare property in passive nonlinear systems allows for deterministic formation of target solitons or breathers.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Mario Ferraro, Fabio Mangini, Mario Zitelli, Raphael Jauberteau, Yifan Sun, Pedro Parra-Rivas, Katarzyna Krupa, Alessandro Tonello, Vincent Couderc, Stefan Wabnitz
Summary: This study investigates the evolution of polarization state in beam self-cleaning in multimode fibers, revealing its complexity. The research findings verify the validity of theoretical approaches for describing nonlinear propagation in multimode fibers and provide important insights for the application of beam self-cleaning effect.
IEEE PHOTONICS JOURNAL
(2023)
Review
Physics, Multidisciplinary
Mario Ferraro, Fabio Mangini, Mario Zitelli, Stefan Wabnitz
Summary: Spatial beam self-cleaning refers to the transformation of the transverse intensity profile at the output of graded-index multimode optical fibers from speckles into a bell-shaped beam sitting on a low intensity background induced by input power. It has remarkable properties of improving output beam brightness and being robust to fiber bending and squeezing. These properties overcome the limitations of multimode fibers and have great potential for various technological applications.
ADVANCES IN PHYSICS-X
(2023)
Article
Physics, Multidisciplinary
M. Gervaziev, M. Ferraro, E. V. Podivilov, F. Mangini, O. S. Sidelnikov, D. S. Kharenko, M. Zitelli, M. P. Fedoruk, S. A. Babin, S. Wabnitz
Summary: We summarize our recent experimental studies on the nonlinear spatial reshaping of multimode beams at the output of multimode optical fibers. A holographic mode decomposition technique is used to reveal the variation of the spatial mode composition at the fiber output, caused by conservative (the Kerr effect) or dissipative (Raman scattering) nonlinear processes. We investigate the effect of spatial beam self-cleaning and compare experimental results with thermodynamic theory predictions, including beams carrying non-zero orbital angular momentum. Additionally, we analyze the beam mode content at the output of a Raman laser based on a graded index multimode fiber.
OPTOELECTRONICS INSTRUMENTATION AND DATA PROCESSING
(2023)
Article
Physics, Multidisciplinary
M. Zitelli, M. Ferraro, F. Mangini, S. Wabnitz
Summary: We have experimentally and numerically shown that picosecond telecom pulses cannot form a single multimode soliton in a graded-index fiber. This property is beneficial in space-division multiplexed systems for transmitting independent soliton channels that do not merge into a single multimode soliton.
OPTOELECTRONICS INSTRUMENTATION AND DATA PROCESSING
(2023)
Proceedings Paper
Nanoscience & Nanotechnology
Mario Zitelli, Vincent Couderc, Mario Ferraro, Fabio Mangini, Pedro Parra-Rivas, Yifan Sun, Stefan Wabnitz
Summary: In this experiment, the mode power distribution from long spans of graded-index multimode fiber is investigated. It is found that, at relatively low powers, linear random mode coupling leads to a Bose-Einstein mode distribution. At powers near the nonlinear soliton regime, the distribution approaches a modified Rayleigh-Jeans law.
2023 IEEE PHOTONICS SOCIETY SUMMER TOPICALS MEETING SERIES, SUM
(2023)
Proceedings Paper
Nanoscience & Nanotechnology
Pedro Parra-Rivas, Yifan Sun, Mario Zitelli, Mario Ferraro, Fabio Mangini, Stefan Wabnitz
Summary: We investigate the formation of high-order dissipative solitons in externally-driven Kerr resonators in the presence of radially symmetric parabolic potentials using bifurcation analysis.
2023 IEEE PHOTONICS SOCIETY SUMMER TOPICALS MEETING SERIES, SUM
(2023)
