Single-mode excitation of multimode fibers with ultrashort pulses

1998 ◽  
Vol 23 (1) ◽  
pp. 52 ◽  
Author(s):  
Martin E. Fermann
Keyword(s):  
Ultrashort Pulses ◽  
Single Mode ◽  
Multimode Fibers ◽  
Mode Excitation

scholarly journals Solving the mystery of the walk-off soliton

2021 ◽  
Author(s):  
Mario Zitelli ◽  
Fabio Mangini ◽  
Mario Ferraro ◽  
Oleg Sidelnikov ◽  
Stefan Wabnitz
Keyword(s):  
Input Pulse ◽  
Ultrashort Pulses ◽  
Single Mode ◽  
High Energy ◽  
Multimode Fiber ◽  
Variational Theory ◽  
Multimode Fibers ◽  
Graded Index ◽  
Optical Modes ◽  
Energy Laser

Abstract Pioneering works on multimode fiber transmission [1,2], dated 40 years ago, predicted the existence of multimode solitons, providing conditions for the temporal trapping of the input optical modes to form a spatiotemporal soliton [3-5]. Only recently [6-8], multimode solitons were experimentally investigated in graded-index multimode fibers (GRIN), unveiling the complexity of a new, uncharted field. In our work, we experimentally and numerically investigated the propagation of ultrashort pulses over long distances of GRIN fiber. We discovered a new class of spatiotemporal solitons with surprising properties: basically single-mode, they cannot be described by the variational theory; their pulsewidth and energy are independent of the input pulse duration, and appear to depend only on the fiber dispersive parameters and, therefore, the wavelength. The new solitons are promising for the delivery of high-energy laser beams, for high-power spatiotemporal mode-locked multimode fiber lasers, and for high-bit rate multimode fiber networks.

Ultrashort pulses propagation through different approaches of the Split-Step Fourier method

2018 ◽  
Vol 1 (3) ◽  
pp. 2
Author(s):  
José Stênio De Negreiros Júnior ◽  
Daniel Do Nascimento e Sá Cavalcante ◽  
Jermana Lopes de Moraes ◽  
Lucas Rodrigues Marcelino ◽  
Francisco Tadeu De Carvalho Belchior Magalhães ◽  
...  
Keyword(s):  
Energy Conservation ◽  
Optical Pulse ◽  
Time Window ◽  
Fourier Method ◽  
Ultrashort Pulses ◽  
Nonlinear Effects ◽  
Single Mode ◽  
Time Algorithm ◽  
Optical Pulses ◽  
Running Time

Simulating the propagation of optical pulses in a single mode optical fiber is of fundamental importance for studying the several effects that may occur within such medium when it is under some linear and nonlinear effects. In this work, we simulate it by implementing the nonlinear Schrödinger equation using the Split-Step Fourier method in some of its approaches. Then, we compare their running time, algorithm complexity and accuracy regarding energy conservation of the optical pulse. We note that the method is simple to implement and presents good results of energy conservation, besides low temporal cost. We observe a greater precision for the symmetrized approach, although its running time can be up to 126% higher than the other approaches, depending on the parameters set. We conclude that the time window must be adjusted for each length of propagation in the fiber, so that the error regarding energy conservation during propagation can be reduced.

Side-Mode Excitation in Single-Mode Laser Diodes

2016 ◽  
Vol 16 (2) ◽  
pp. 158-163 ◽  
Author(s):  
Massimo Vanzi ◽  
K. Xiao ◽  
Giulia Marcello ◽  
Giovanna Mura
Keyword(s):  
Laser Diodes ◽  
Single Mode ◽  
Mode Laser ◽  
Single Mode Laser ◽  
Mode Excitation ◽  
Side Mode

STUDY ON SINGLE-MODE EXCITATION IN TIME-VARIANT SHALLOW WATER ENVIRONMENT

2014 ◽  
Vol 22 (01) ◽  
pp. 1440001
Author(s):  
DAYONG PENG ◽  
TIANFU GAO ◽  
JUAN ZENG
Keyword(s):  
Shallow Water ◽  
Recursive Algorithm ◽  
Water Environment ◽  
Sound Field ◽  
Single Mode ◽  
Shallow Water Environment ◽  
Mode Excitation ◽  
Ocean Environment ◽  
Short Time ◽  
Function Matrix

Single-mode excitation is a powerful tool for studying many oceanographic processes. Meanwhile, the complex time-variant ocean environment poses a great challenge for single-mode excitation because Green's function matrix of sound field changes quickly. In their previous work, the authors built a system to excite single-mode in a relative simple environment. The purpose of this paper is to study the feasibility of single-mode excitation in rapidly time-variant ocean environment. An improved recursive algorithm is presented to adapt for time-variant environment where the single-mode can be excited within very short time by this algorithm. A typical time-variant shallow water environment is simulated, and results of the single-mode excitation in this environment are presented.

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