Second‐harmonic generation of electromagnetic emissions in a magnetized plasma: Kinetic theory approach

2021 ◽  
Author(s):  
Xiongdong Yu ◽  
Zhigang Yuan ◽  
Zuxiang Xue
Keyword(s):  
Kinetic Theory ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Magnetized Plasma ◽  
Theory Approach ◽  
Plasma Kinetic ◽  
Electromagnetic Emissions

scholarly journals The second harmonic generation in a collisional magnetoactive plasma

2009 ◽  
Vol 7 (1) ◽  
pp. 1-6 ◽  
Author(s):  
B.M. Jovanovic
Keyword(s):  
Second Harmonic Generation ◽  
Nonlinear Equations ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Magnetoactive Plasma ◽  
Frequency Doubling ◽  
Plasma Boundary ◽  
Magnetized Plasma ◽  
Wave Frequency ◽  
System Of Nonlinear Equations

Characteristics for the generation of the second harmonic in homogeneous, collisional and magnetized plasma are investigated theoretically by solving the system of nonlinear equations for the fundamental and second harmonic extraordinary waves. The dependence of the efficiency of the wave frequency doubling on the distance from the plasma boundary and on the collisional frequency has been calculated.

scholarly journals Second harmonic generation of q-Gaussian laser beam in plasma channel created by ignitor heater technique

2019 ◽  
Vol 37 (2) ◽  
pp. 184-196 ◽  
Author(s):  
Naveen Gupta
Keyword(s):  
Second Harmonic Generation ◽  
Laser Beam ◽  
Harmonic Generation ◽  
Plasma Channel ◽  
Second Harmonic ◽  
Laser Beams ◽  
Theory Approach ◽  
Gaussian Laser Beam ◽  
Incident Laser ◽  
Pump Frequency

AbstractThis paper presents a scheme for second harmonic generation (SHG) of q-Gaussian laser beam in plasma channel created by ignitor heater technique. The ignitor beam creates plasma by tunnel ionization of air. The heater beam heats the plasma electrons and establishes a parabolic density profile. The third beam (q-Gaussian beam) is guided in this plasma channel under the combined effects of density nonuniformity of the plasma channel and relativistic mass nonlinearity of the plasma electrons. The propagation of q-Gaussian laser beam through the plasma channel excites an electron plasma wave at pump frequency that interacts with the incident laser beam to produce its second harmonics. The formulation is based on finding the numerical solution of the nonlinear Schrodinger wave equation for the fields of the incident laser beams with the help of moment theory approach. Particular emphasis is put on dynamical variations of the spot size of the laser beams and conversion efficiency of the second harmonics with distance of propagation.

scholarly journals Second-harmonic generation by an obliquely incident s-polarized laser from a magnetized plasma

2016 ◽  
Vol 34 (2) ◽  
pp. 276-283 ◽  
Author(s):  
Deep Kumar Kuri ◽  
Nilakshi Das
Keyword(s):  
Magnetic Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
Magnetized Plasma ◽  
Angle Of Incidence ◽  
Obliquely Incident ◽  
Relativistic Factor ◽  
The Magnetic Field

AbstractSecond-harmonic generation by an obliquely incident s-polarized laser from an underdense plasma in the presence of a magnetic field has been investigated analytically. An expression for the relativistic factor γ has been obtained in the presence of magnetic field. The efficiency of second-harmonic radiation η has been obtained as a function of angle of incidence θ, normalized electric field amplitude of laser beam a0, normalized electron density ${\rm \omega} _{\rm p}^2 /{{\rm \omega} ^2}$, and magnetic field b. It is observed that γ increases with b. In turn, the conversion efficiency decreases with an increase in b. It is seen that the conversion efficiency is affected by the magnetic field due to the modified relativistic factor. In the absence of magnetic field, η increases with a0 and θ. However, in the presence of magnetic field, the conversion efficiency starts decreasing as the magnetic field is increased.

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