Article
Engineering, Electrical & Electronic
N. Ayyanar, G. Thavasi Raja
Summary: The lasing characteristics of a newly designed ytterbium-doped modified hybrid multi trench fiber (YDMHMTF) under strongly pumped conditions have been numerically investigated. The YDMHMTF fiber maintains high conversion efficiency for both straight and bending cases, showing potential for efficient compact laser systems suitable for industrial laser applications. The simulation results demonstrate the feasibility and effectiveness of the proposed YDMHMTF fiber design compared to other types of fiber designs such as photonic crystal fiber and Bragg fiber.
OPTICAL FIBER TECHNOLOGY
(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
Manuel Duran-Sanchez, Olivier Pottiez, Berenice Posada-Ramirez, Ricardo Alvarez-Tamayo, Ivan Armas-Rivera, Miguel Bello-Jimenez, Yasser A. Garcia-Flores, E. Montiel-Pina, Baldemar Ibarra-Escamilla
Summary: This paper demonstrates the generation of diverse structures of robust optical pulses using a ring cavity passively mode-locked fiber laser, based on a double-clad erbium-ytterbium doped fiber. By adjusting the wave retarders, various pulsed laser operation regimes were achieved, including quasi-continuous wave, solitons, and NLPs. The NLPs obtained in this study exhibited narrow peak coherence of approximately 231 fs.
Article
Instruments & Instrumentation
Zhenhao Wang, Shukai Zheng, Fanlong Dong, Jiachen Wang, Linpeng Yu, Xing Luo, Peiguang Yan, Jinzhang Wang, Qitao Lue, Chunyu Guo, Shuangchen Ruan
Summary: This study demonstrates the successful realization of a synchronously pumped mode-locked ytterbium-doped fiber laser and investigates the mechanism of this mode-locking technique. The laser exhibits high performance and environmental stability, providing a potential strategy for achieving high-performance ultrafast fiber sources in spectral regions without efficient modulators or saturable absorbers.
INFRARED PHYSICS & TECHNOLOGY
(2022)
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
Materials Science, Multidisciplinary
Charu Goel, Seongwoo Yoo, Wonkeun Chang
Summary: In this paper, a unique hybrid guidance mechanism is proposed to design bend-tolerant, ultra-large mode field area fibers for high-power laser applications based on the characteristics of all-solid large-mode-area antiresonant fibers. Low-index rods are strategically interspersed into the antiresonant cladding to enhance the modal confinement in the fiber, resulting in the increased tolerance to bending and to the refractive index dip. The total internal reflection guidance greatly helps confine the fundamental mode without masking the characteristic features of antiresonant guidance.
RESULTS IN PHYSICS
(2023)
Article
Optics
Jiaqiang Lin, Zhipeng Dong, Tianhao Dong, Xuexiao Ma, Chuansheng Dai, Peijun Yao, Chun Gu, Lixin Xu
Summary: In this study, an all-fiber bidirectional mode-locked laser based on nonlinear multimode interference is reported. It can generate asynchronous pulse trains in different directions and operate in different states. This work provides a new platform for studying the dynamic characteristics of bidirectional mode-locked lasers.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Yudong Cui, Yusheng Zhang, Youjian Song, Lin Huang, Limin Tong, Jianrong Qiu, Xueming Liu
Summary: The study reports a novel soliton operation observed in a mode-locked fiber laser, where XPM induces and sustains the vector asymmetrical soliton with spectral period doubling. The XPM-induced VAS is characterized by an asymmetrical steady state distinct from other soliton forms, contributing to further research on optical nonlinear dynamics and chaos.
LASER & PHOTONICS REVIEWS
(2021)
Article
Physics, Multidisciplinary
Rui Gong, Yalin Geng, Li Pei, Huai Wei
Summary: In this paper, a 2-μm synchronous multi-wavelength fiber laser based on cascaded Mamyshev regenerators is proposed. A stable synchronous multi-wavelength mode-locked laser was achieved through numerical simulation, providing six-channel ultrashort pulses.
FRONTIERS IN PHYSICS
(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
Qiujun Ruan, Xiaosheng Xiao, Jinhai Zou, Hang Wang, Shuzheng Fan, Tianran Li, Jin Li, Zhipeng Dong, Zhiping Cai, Zhengqian Luo
Summary: This paper reports a fiber laser capable of spatiotemporal mode-locking (STML) at visible wavelengths, demonstrating its stability and narrow pulse duration through theoretical prediction and experimental realization. The locking of transverse and longitudinal modes is also illustrated, and the power is further boosted by establishing an ultrafast fiber amplifier.
LASER & PHOTONICS REVIEWS
(2022)
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
Engineering, Electrical & Electronic
Renlai Zhou, Xuanyi Liu, M. S. Aruna Gandhi, Guanyu Liu, H. Y. Fu, Zhigang Zhang, Qian Li
Summary: The experimental observation of soliton molecules in a robust all polarization-maintaining (PM) mode-locked fiber laser with a nonreciprocal phase bias has been reported for the first time, resulting in a low self-starting threshold and stable mode locking. By elaborately tuning waveplates in the cavity, versatile soliton molecules are achieved and manipulated at different pump powers. Theoretical investigations show good concurrence with achieved experimental results regarding the spectral characteristics of soliton molecules with various phase differences and time separations in the cavity.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
Dengke Xing, Jiangyong He, Pan Wang, Kun Chang, Congcong Liu, Yange Liu, Zhi Wang
Summary: This research experimentally investigates the transition process between noise-like pulses and Q-switching pulses in few-mode mode-locked lasers. It confirms that the process is the reconstruction of Q-switching between different modes to noise-like pulses through spectral filtering. Furthermore, the study detects soliton collisions during the evolution of noise-like pulses.
Article
Optics
M. Duran-Sanchez, B. Posada-Ramirez, R. alvarez-Tamayo, M. Bello-Jimenez, Y. A. Garcia-Flores, I Armas-Rivera, E. Montiel-Pina, E. A. Kuzin, B. Ibarra-Escamilla
Summary: In this experimental study, switchable rectangular pulses were generated in a passively mode-locked double-clad thulium-doped fiber laser operating in the anomalous dispersion regime. The laser utilizes a fiber loop mirror and a polarization imbalanced nonlinear optical loop mirror (NOLM) to form a linear cavity, with the loop in the NOLM allowing switching between two regimes of rectangular pulse generation. The laser is capable of generating rectangular noise-like pulses (NLPs) or dissipative soliton resonance (DSR) pulses with 1.18 MHz repetition rate at around 1990 nm.
