Propagation characteristics of two-color laser pulses in homogeneous plasma

An analytical and numerical study of the evolution of two-color, sinusoidal laser pulses in cold, underdense, and homogeneous plasma has been presented. The wave equations for the radiation fields driven by linear as well as nonlinear contributions due to the two-color laser pulses have been set up....

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Bibliographic Details
Published in:Physics of plasmas 2015-11, Vol.22 (11)
Main Authors: Hemlata, Saroch, Akanksha, Jha, Pallavi
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Chirp
COLOR
COMPRESSION
Evolution
FOCUSING
HOMOGENEOUS PLASMA
Laser printers
LASER RADIATION
Lasers
NONLINEAR PROBLEMS
NUMERICAL ANALYSIS
Numerical methods
Parameters
Plasma physics
Pulse propagation
PULSES
Simultaneous equations
VARIATIONAL METHODS
WAVE EQUATIONS
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Summary:An analytical and numerical study of the evolution of two-color, sinusoidal laser pulses in cold, underdense, and homogeneous plasma has been presented. The wave equations for the radiation fields driven by linear as well as nonlinear contributions due to the two-color laser pulses have been set up. A variational technique is used to obtain the simultaneous equations describing the evolution of the laser spot size, pulse length, and chirp parameter. Numerical methods are used to graphically analyze the simultaneous evolution of these parameters due to the combined effect of the two-color laser pulses. Further, the pulse parameters are compared with those obtained for a single laser pulse. Significant focusing, compression, and enhanced positive chirp is obtained due to the combined effect of simultaneously propagating two-color pulses as compared to a single pulse propagating in plasma.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4934977