Numerical studies of the interplay between self‐phase modulation and dispersion for intense plane‐wave laser pulses

1975 ◽  
Vol 46 (11) ◽  
pp. 4921-4934 ◽  
Author(s):  
Robert A. Fisher ◽  
William K. Bischel
Keyword(s):  
Plane Wave ◽  
Phase Modulation ◽  
Laser Pulses ◽  
Self Phase Modulation ◽  
Numerical Studies ◽  
Wave Laser

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.

Self-phase modulation in various regimes of intense laser–plasma interactions

2015 ◽  
Vol 81 (6) ◽  
Author(s):  
Antonio Giulietti ◽  
Danilo Giulietti
Keyword(s):  
Laser Plasma ◽  
Phase Modulation ◽  
Laser Action ◽  
Laser Pulses ◽  
Intense Laser ◽  
Nanosecond Laser ◽  
Linear Processes ◽  
Plasma Interactions ◽  
Self Phase Modulation ◽  
Laser Plasma Interactions

Creation of plasmas by intense laser pulses and consequent laser–plasma interactions involve highly non-linear processes. In particular, a variation of the refractive index induced by the laser action turns into a self-phase modulation (SPM) of the laser field. This effect, already observed with nanosecond laser pulses, achieves striking evidence with ultra-short pulses whose intensity can produce index changes in a time as short as a single optical cycle. In this condition, spectral modifications of the laser pulse produced by SPM may strongly modify the laser–plasma interaction. At the same time, the spectral analysis of the transmitted and scattered laser radiation gives valuable information on a variety of processes occurring in the plasma. In this paper we simply consider a few results, which can be attributed to SPM, with the aim of comparing nanosecond and sub-picosecond laser interaction regimes at moderate laser intensities.

Self-Guided Intense Laser Pulse Propagation in Air

2001 ◽  
Vol 6 (1) ◽  
pp. 21-26
Author(s):  
R. Danielius ◽  
D. Mikalauskas ◽  
A. Dubietis ◽  
A. Piskarskas
Keyword(s):  
Laser Pulse ◽  
Laser Beam ◽  
Phase Modulation ◽  
Large Scale ◽  
Pulse Propagation ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Self Phase Modulation

We report on observation of self-guiding of picosecond laser pulses in air that produces large-scale self-phase modulation. The converging picosecond laser beam produced a confined filament over 3 m of propagation with the whitelight spectrum.

scholarly journals Characterization of ultrashort laser pulses employing self-phase modulation dispersion-scan technique

2018 ◽  
Vol 20 (3) ◽  
pp. 035502 ◽  
Author(s):  
A B Sharba ◽  
O Chekhlov ◽  
A S Wyatt ◽  
R Pattathil ◽  
M Borghesi ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Self Phase Modulation ◽  
Ultrashort Laser
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