Article
Optics
V. L. Kalashnikov, S. Wabnitz
Summary: This article introduces a method for stabilizing spatiotemporal solitons, which can be applied in various optical systems. By combining spatial refractive index and dissipation profiles with temporal phase modulation, stable dissipative solitons can be generated. Numerical and analytical methods are used to study the characteristics and stability of the solitons.
LASER PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Viktor M. Gololobov, Pavel S. Anisimov, Viacheslav V. Zemlyakov, Jiexing Gao
Summary: We propose a novel approach for designing refractive index profile functions in multimode optical fibers, which allows for independent control of mode properties. By introducing oscillating components, we demonstrate the successful acquisition of two modified graded-index multimode fibers with significantly reduced differential mode group delay. These optimized fiber properties can withstand realistic manufacture imperfections, highlighting the potential of our design scheme. Evaluation: 8/10.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Charu Goel, Seongwoo Yoo
Summary: A novel centro-symmetric nested antiresonant fiber (CNAF) design is proposed and investigated numerically for low-loss, multimode applications, showing superiority over conventional asymmetric nested tube designs in inhibiting coupling of higher order modes to lossy cladding modes and supporting multiple distinct core mode groups. The designed fiber supports 5 to 9 spatially distinct core mode groups with confinement loss less than 0.002 dB/m to 0.01 dB/m respectively.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Aleksandr Ramaniuk, Jakub Kaczorowski, Piotr Nowakowski, Krzysztof Markiewicz, Janusz Poplawski, Dominika Teklinska, Piotr Wojcierowski, Lukasz Szostkiewicz, Marek Napierala, Tomasz Nasilowski
Summary: This article discusses the possible advantages of using few-mode and multimode fibers in coherent optical time-domain reflectometry sensing systems, including reducing nonlinear effects, preventing modulation instability, increasing signal power at the receiver, and potentially increasing sensing distance.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
M. A. Eftekhar, H. Lopez-Aviles, F. W. Wise, R. Amezcua-Correa, D. N. Christodoulides
Summary: Advancements in computational capabilities and accessing high power levels have led to a reevaluation of multimode fibers, which are now being pursued to address information bandwidth issues and implement new high-power laser sources. The complexity of interacting modes in multimode fibers has provided fertile ground for observing novel physical effects, but also presents challenges in understanding emerging physical phenomena. A comprehensive theory has been developed to explain the distinct Cherenkov radiation produced during multimode soliton fission events, enhancing understanding of the complex nonlinear processes. The multifaceted nature of nonlinear multimode fibers allows for the observation of unique physical effects, not possible in single-mode settings.
COMMUNICATIONS PHYSICS
(2021)
Article
Automation & Control Systems
Hang Zhang, Weiguo Liu, Zhe Chen, Ningfei Jiao
Summary: The multimode synchronous pulsewidth modulation strategy is widely used in rail-transit applications for better control performance in middle- or high-speed regions, presenting challenges for sensorless control. Transition between different PWM modes can significantly affect the amplitude and phase of low-order harmonics, impacting position estimation accuracy. By designing a fast transition method, smooth transitions can be achieved, eliminating position fluctuation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Optics
Teng Wang, Yongmin Jung, Peter Horak, Xianglong Zeng, David J. Richardson
Summary: The experimental demonstration of a passively mode-locked fiber ring laser using a SCF-GIMMF-SMF structure as an effective saturable absorber based on the NL-MMI effect has shown stable fundamental mode-locked operation at 1557.96 nm with 647 fs pulse duration and 5.2 nm spectral width. This NL-MMI SA can be applied to high-power mode-locked fiber lasers due to its high damage threshold, compact size, wavelength independent operation, and fabrication simplicity.
Article
Optics
E. Aban Chenui, Alain M. Dikande
Summary: This study proposes a scheme for generating quantum photosoliton states by coupling linear photon fields to a vector high-intensity optical field with coexisting bright and dark solitons. The characteristics of the probe spectrum depend on the couplings of the linear photon field to the bright and dark soliton components of the vector-soliton pump, resulting in a rich variety of photosoliton modes. The findings show the potential for creating and manipulating quantum photosoliton states in optical materials with Kerr nonlinearity.
Article
Physics, Multidisciplinary
E. Podivilov, F. Mangini, O. S. Sidelnikov, M. Ferraro, M. Gervaziev, D. S. Kharenko, M. Zitelli, M. P. Fedoruk, S. A. Babin, S. Wabnitz
Summary: We investigate the thermalization of light carrying orbital angular momentum in multimode optical fibers induced by nonlinear intermodal interactions. Based on the conservation of the angular momentum, we obtain a generalized Rayleigh-Jeans distribution of asymptotic mode composition. We confirm our predictions through numerical simulations and experiments using holographic mode decomposition of multimode beams. Our work establishes new constraints for achieving spatial beam self-cleaning and provides previously unforeseen insights into the underlying physical mechanisms.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
M. D. Gervaziev, I Zhdanov, D. S. Kharenko, V. A. Gonta, V. M. Volosi, E. Podivilov, S. A. Babin, S. Wabnitz
Summary: This study presents an experimental method for mode decomposition using computer digital holography and spatial light modulator, successfully demonstrating the observation of a large number of fiber modes.
LASER PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Svetislav Savovic, Konstantinos Aidinis, Alexandar Djordjevich, Rui Min
Summary: The Langevin equation is used to evaluate mode coupling in both unstrained and strained multimode step-index polymer optical fiber (SI POF). Strain-induced mode coupling is stronger in strained fibers compared to unstrained fibers of the same type. The numerical solution of the Langevin equation matches the numerical solution of the power flow equation. It is crucial to compute the modal distribution of SI POFs used in optical fiber sensory systems under various bending scenarios.
Article
Optics
Junhe Zhou, Haoqian Pu
Summary: This paper investigates the evolutionary behavior of transfer matrix element moments in strongly coupled multimode systems analytically, using a set of coupled stochastic differential equations to model the randomly coupled multimode system. The analytical method provides excellent match with Monte Carlo simulation results, showcasing its usefulness in multimode system design and analysis.
Review
Physics, Multidisciplinary
Logan G. Wright, Fan O. Wu, Demetrios N. Christodoulides, Frank W. Wise
Summary: This Review presents the breadth of the high-dimensional nonlinear physics that can be studied in multimode fibre and laser cavity systems. These systems, with their multifaceted control, low cost, scalability, and ultrahigh bandwidth, are ideal physical platforms for exploring and applying high-dimensional nonlinear physics, from spatial solitons to dynamical complexity.
Article
Engineering, Electrical & Electronic
Nunzio Cennamo, Domenico Del Prete, Francesco Arcadio, Luigi Zeni
Summary: A novel sensing method for temperature measurements of liquids using plasmonic resonance in multimode plastic optical fibers has been devised. The method involves connecting two different D-shaped POF platforms to measure temperature changes in the solution covering the thermosensitive platform. This approach allows for the measurement of temperature by varying the light launch conditions in the surface plasmon resonance POF sensor as a result of temperature changes.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Denis S. Kharenko, Alexander A. Revyakin, Mikhail D. Gervaziev, Mario Ferraro, Fabio Mangini, Sergey A. Babin
Summary: Mode decomposition is a powerful tool for analyzing optical multimode radiation, but existing methods are slow. This paper numerically studies three types of digital holograms and compares their accuracy in detecting the mode amplitudes of multimode beams. A novel algorithm for statistical analysis is proposed.
