FDTD Method for Retrieving the Nonlinear-Index Coefficient Based on Self-Phase Modulation

2013 ◽  
Vol 798-799 ◽  
pp. 245-248
Author(s):  
Qing Wei Liu ◽  
Dong Mo Song
Keyword(s):  
Phase Modulation ◽  
Nonlinear Optical ◽  
Fdtd Method ◽  
Laser Pulses ◽  
Optical Pulses ◽  
Power Laser ◽  
Third Order ◽  
Self Phase Modulation ◽  
Nonlinear Index ◽  
Difference Time

In this paper we have retrieved the nonlinear-index coefficient based on the self-phase modulation which is resulted from a high-power laser pulses propagating in a third-order nonlinear optical material. Using the finite-difference time-domain method, the spectrum analyses have been performed with the optical pulses with different peak-powers propagating through the nonlinear optical materials with different lengths. The nonlinear-index coefficients were obtained by using the numbers of the spectrum peaks, and how to improve the accuracy has been discussed.

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.

Influence of the cubic spectral phase of high-power laser pulses on their self-phase modulation

2016 ◽  
Vol 46 (2) ◽  
pp. 106-108 ◽  
Author(s):  
V N Ginzburg ◽  
A A Kochetkov ◽  
I V Yakovlev ◽  
S Yu Mironov ◽  
A A Shaykin ◽  
...  
Keyword(s):  
High Power ◽  
Phase Modulation ◽  
Laser Pulses ◽  
Spectral Phase ◽  
High Power Laser ◽  
Power Laser ◽  
Self Phase Modulation

scholarly journals Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3194
Author(s):  
Adrian Petris ◽  
Petronela Gheorghe ◽  
Tudor Braniste ◽  
Ion Tiginyanu
Keyword(s):  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Laser Pulses ◽  
Third Harmonic Generation ◽  
High Repetition Rate ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
High Repetition ◽  
Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

Optical, electrochemical and third-order nonlinear optical studies of triphenylamine substituted zinc phthalocyanine

2016 ◽  
Vol 20 (08n11) ◽  
pp. 1173-1181 ◽  
Author(s):  
Narra Vamsi Krishna ◽  
Puliparambil Thilakan Anusha ◽  
S. Venugopal Rao ◽  
L. Giribabu
Keyword(s):  
Nonlinear Optical ◽  
Emission Spectra ◽  
Optical Emission ◽  
Soret Band ◽  
Laser Pulses ◽  
Zinc Phthalocyanine ◽  
Third Order ◽  
Time Resolved ◽  
Nlo Properties ◽  
Scan Data

Zinc phthalocyanine possessing triphenylamine at its peripheral position has been synthesized and its optical, emission, electrochemical and third-order nonlinear optical (NLO) properties were investigated. Soret band was broadened due to the presence of triphenylamine moiety. Electrochemical properties indicated that both oxidation and reduction processes were ring centered. Emission spectra were recorded in different solvents and the fluorescence yields obtained were in the range of 0.02–0.17 while the time-resolved fluorescence data revealed radiative lifetimes of typically few ns. Third-order NLO properties of this molecule have been examined using the Z-scan technique with picosecond (ps) and femtoseocnd (fs) pulses. Closed and open aperture Z-scan data were recorded with 2 ps/1 50 fs laser pulses at a wavelength of 800 nm and NLO coefficients were extracted from both the data. Our data clearly suggests the potential of this molecule for photonics applications.

scholarly journals Graphene’s nonlinear-optical physics revealed through exponentially growing self-phase modulation

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Nathalie Vermeulen ◽  
David Castelló-Lurbe ◽  
Mulham Khoder ◽  
Iwona Pasternak ◽  
Aleksandra Krajewska ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Nonlinear Optical ◽  
Self Phase Modulation
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