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2 results

Resonant third harmonic generation of an infrared laser in a semiconductor wave guide
Vijay Garg, V.K. Tripathi
Journal:

Laser and Particle Beams / Volume 28 / Issue 2 / June 2010

Published online by Cambridge University Press:

17 June 2010, pp. 327-332
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An infrared laser propagating through a semiconductor waveguide, embedded with a density ripple of wave number q, resonantly excites third harmonic radiation. The phase matching is achieved when q equals difference between third harmonic wave number and three times the wave number of the laser. The excited third harmonic is in higher order radial Eigen mode than the pump laser. The third harmonic efficiency increases with electron concentration and decreases with the frequency of the laser.

Laser second harmonic generation in a rippled density plasma in the presence of azimuthal magnetic field
U. Verma, A.K. Sharma
Journal:

Laser and Particle Beams / Volume 27 / Issue 4 / December 2009

Published online by Cambridge University Press:

08 December 2009, pp. 719-724
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The strong azimuthal magnetic fields, observed in many laser plasma experiments, are shown to be a potential source of second harmonic generation. The laser imparts oscillatory velocity to electrons and exerts a longitudinal pondromotive force on them. This force in conjunction with the azimuthal magnetic field and density ripple produces a second harmonic current with significant transverse component. The latter produces resonant second harmonic radiation.

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2 results

Resonant third harmonic generation of an infrared laser in a semiconductor wave guide

Laser second harmonic generation in a rippled density plasma in the presence of azimuthal magnetic field