کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
847352 909226 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Second harmonic generation by self focused q-Gaussian laser beam in preformed collisional parabolic plasma channel
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Second harmonic generation by self focused q-Gaussian laser beam in preformed collisional parabolic plasma channel
چکیده انگلیسی

This paper presents an investigation of self-focusing of a q-Gaussian laser beam and its effect on second generation in a preformed collisional parabolic plasma channel. In the presence of a q-Gaussian laser beam redistribution of carriers takes place on account of nonuniform heating produced due to collisional nonlinearity, as a result of which, a transverse density gradient is established in the channel which in turn generates plasma wave at pump frequency. Generated plasma wave interacts with the incident laser beam and generate second harmonics of the incident laser beam. Moment theory has been used to derive differential equation governing the evolution of spot size of laser beam propagating through the channel. The differential equation so obtained has been solved numerically. The effect of the intensity of laser beam, deviation of intensity distribution of laser beam along its wavefront from Gaussian distribution, plasma density and depth of channel on beam width of laser beam as well as second harmonic yield has been investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - International Journal for Light and Electron Optics - Volume 127, Issue 5, March 2016, Pages 2432–2438
نویسندگان
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