scholarly journals A Numerical Method for Pulse Propagation in Nonlinear Dispersive Optical Media

2021 ◽  
pp. 12-22
Author(s):  
Gaston Edah ◽  
Aurélien Goudjo ◽  
Jamal Adetola ◽  
Marc Amour Ayela
Keyword(s):  
Finite Difference Time Domain ◽  
Discrete System ◽  
Pulse Propagation ◽  
Periodic Boundary Conditions ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Third Order ◽  
Optical Media ◽  
Ultrashort Laser ◽  
Difference Time

In this work, the pulse propagation in a nonlinear dispersive optical medium is numerically investigated. The finite difference time-domain scheme of third order and periodic boundary conditions are used to solve generalized nonlinear Schr¨odinger equation governing the propagation of the pulse. As a result a discrete system of ordinary differerential equations is obtained and solved numerically by fourth order Runge-Kutta algorithm. Varied input ultrashort laser pulses are used. Accurate results of the solutions are obtained and the comparison with other results is excellent.

scholarly journals FDTD Modeling of double ultrashort pulse propagation in nonlinear absorbing media

2020 ◽  
Vol 238 ◽  
pp. 12006
Author(s):  
J.D. Pisonero ◽  
O. Varela ◽  
E. García ◽  
I. Hernández ◽  
J. Ajates ◽  
...  
Keyword(s):  
Finite Difference Time Domain ◽  
Pulse Propagation ◽  
Fdtd Method ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Power Laser ◽  
Ultrashort Pulse Propagation ◽  
Absorbing Media ◽  
Ultrashort Laser ◽  
Difference Time

An approach based on the finite-difference time-domain (FDTD) method is developed for simulating the dynamics of two ultrashort laser pulses inside a saturable absorbing media. This work discusses the results obtained using this numerical model for the prediction of the nonlinear absorbing media behaviour as well as how it affects the final double pulse combination. These results can be used to improve contrast cleaning conditions for high power laser chains and for synchronization studies, this last application was checked in the VEGA facility lab as a code validation.

Single-shot diagnosing of spatiotemporal couplings in ultrashort laser pulses by spatiospectral imaging of a third-order nonlinear process

2020 ◽  
Vol 45 (8) ◽  
pp. 2207
Author(s):  
Margoto Jean-Baptiste ◽  
Cheng Zhao ◽  
Lopez-Martens Rodrigo ◽  
Oksenhendler Thomas
Keyword(s):  
Laser Pulses ◽  
Nonlinear Process ◽  
Ultrashort Laser Pulses ◽  
Single Shot ◽  
Third Order ◽  
Ultrashort Laser

scholarly journals Effect of longitudinal epsilon-near-zero regime in dynamics of ultrashort laser pulses in hyperbolic metamaterials

2021 ◽  
Vol 2015 (1) ◽  
pp. 012098
Author(s):  
Vladimir Novikov
Keyword(s):  
Pulse Propagation ◽  
Field Enhancement ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Pulse Delay ◽  
Hyperbolic Metamaterials ◽  
Spectral Point ◽  
Slow Pulse ◽  
Ultrashort Laser ◽  
Epsilon Near Zero

Abstract Optical properties of hyperbolic metamaterials (HMMs) are in stark contrast to properties of ordinary media that fuels interest to various applications of HMMs in photonics. Special attention is attributed to the epsilon-near zero regime (ENZ) of HMMs that is the spectral point in which real part of the permittivity of the HMM becomes zero. This is accompanied by the effects of field enhancement having far-reaching applications. Here we focus on the experimental and theoretical investigation of the propagation of an ultrashort laser pulse through the silver nanorod-based HMM slab in the spectral range over the ENZ. We revealed pronounced resonant change of the pulse delay in HMMs and the transition between the superluminal and slow pulse propagation at the ENZ spectral point. Observed dynamical phenomena are confirmed theoretically and attributed to unusual case when the spectral half of an ultrashort pulse has elliptical dispersion and another has the hyperbolic one. Special attention is payed to the propagation of chirped laser pulses in the HMMs.

scholarly journals Modelling of the energy density deposition profiles of ultrashort laser pulses focused in optical media

2007 ◽  
Vol 59 ◽  
pp. 646-650
Author(s):  
F Vidal ◽  
P-L Lavertu ◽  
N Bigaouette ◽  
F Moore ◽  
I Brunette ◽  
...  
Keyword(s):  
Energy Density ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Optical Media ◽  
Ultrashort Laser
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