scholarly journals Quasioptical modeling of wave beams with and without mode conversion. II. Numerical simulations of single-mode beams

2019 ◽  
Vol 26 (7) ◽  
pp. 072111 ◽  
Author(s):  
K. Yanagihara ◽  
I. Y. Dodin ◽  
S. Kubo
Keyword(s):  
Numerical Simulations ◽  
Mode Conversion ◽  
Single Mode

Simplification of the Maxwell-Bloch Equation of Standing Wave Lasers

2013 ◽  
Vol 760-762 ◽  
pp. 8-14
Author(s):  
Li Cheng Sun ◽  
Zheng Wu
Keyword(s):  
Mathematical Model ◽  
Numerical Simulations ◽  
Standing Wave ◽  
Light Field ◽  
Single Mode ◽  
Bloch Equation ◽  
Wave Form ◽  
Wave Laser ◽  
Mathematical Evaluation ◽  
New Equation

In order to make a numerical simulation of the chaos in standing wave lasers, a dynamic equation that is feasible to mathematical evaluation is required. There is a summation symbol in the well known Haken laser equation, and it results in a tremendously heavy quantity of evaluation. In order to simplify the evaluation, the light field in the Haken laser equation was expanded in the standing wave form. Two macroscopic variables were brought in to eliminate the summation symbol in terms of single mode and homogeneously broadening. Therefore, a simplified Maxwell-Bloch equation was gained. Then by normalizing, a new equation was obtained. This equation is in a simple form. Its every variable has unambiguous meaning and every coefficient is only related to gain or dissipation and is easy to obtain. Moreover, the equation is used in two MATLAB numerical simulations of a CO2laser and a chaotic attractor is obtained. So the equation could be a mathematical model in numerical simulations of standing wave laser chaos.

scholarly journals THE INFLUENCES OF THE ASYMMETRIC GAIN SATURATION EFFECT ON THE DYNAMICS OF InGaAsP FABRY-PEROT LASERS

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
Veronica Dobrovolschi ◽  
◽  
Constantin Pirtac ◽  
Vasile Tronciu ◽  
◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Bifurcation Analysis ◽  
Single Mode ◽  
Rate Equations ◽  
Gain Saturation ◽  
Fabry Perot ◽  
Saturation Effects ◽  
Two Parameters ◽  
Linewidth Enhancement ◽  
Lasing Modes

This paper reports on the influence of the asymmetric gain saturation on the dynamics of InGaAsP Fabry-Perot lasers. The results are obtained by numerical simulations of multimode rate equations. The gain saturation effects that results in competition phenomena among lasing modes are investigated. A hopping multimode case is examined in detail. With means of the bifurcation analysis the regions with instabilities in the evolution of the mode intensities have been found. The following operation in the plane of two parameters are obtained: stable single mode, stable multimode, bistabile, and multimode hopping. The pulse traces of amplitudes of modes are plotted to illustrate the observed behaviors. Finally, the influence of linewidth enhancement Henry factor on the laser behavior is investigated.

Five-Layer Magnetooptical Waveguide For Single Mode Conversion Using Mlb

1987 ◽  
Author(s):  
F. Canal ◽  
J. Hernandez ◽  
F. Dios ◽  
Ll. Torner
Keyword(s):  
Mode Conversion ◽  
Single Mode

Analysis of multi-mode to single-mode conversion at 635 nm and 1550 nm

2016 ◽  
Author(s):  
Vanessa Zamora ◽  
Angelina Bogatzki ◽  
Norbert Arndt-Staufenbiel ◽  
Jens Hofmann ◽  
Henning Schröder
Keyword(s):  
Mode Conversion ◽  
Single Mode ◽  
Multi Mode
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