کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10134163 | 1645608 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of density ripple on pulse slippage of third harmonic generation in plasma
ترجمه فارسی عنوان
تأثیر چگالی چگالی بر لغزش پالس نسل سوم هارمونیک در پلاسما
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کلمات کلیدی
لیزر، نسل سوم هارمونیک، موج شکنی، لغزش پالس، پلاسما،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
Influence of density ripple on pulse slippage of third harmonic generation has been investigated. When highly intense short range laser pulse incident on plasma, it imparts oscillatory velocity to electrons and exert a ponderomotive force at twice the frequency of incident laser beam. It induces oscillatory velocity at second harmonic frequency 2Ï which further couples with density ripple resulting in density oscillations at 2Ï. Density oscillations at 2Ï, couple with the oscillatory velocity at Ï, to produce non-linear current density at 3Ï which drives the third harmonic generation. In order to provide phase matching condition between fundamental and third harmonic pulses, density ripple in plasma is introduced which offers the required momentum to the third harmonic photon to make the process resonant. At resonance, amplitude of the third harmonic pulse is found to be maximum for optimized values of density ripple factor. It is observed that the peak value of third harmonic pulse shifted towards higher value of normalized distance z' for higher values of normalized time t'. It is also seen that on account of the group velocity mismatch between pump and third harmonic pulses, the third harmonic pulse slips out of the domain of pump pulse.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - Volume 174, December 2018, Pages 354-362
Journal: Optik - Volume 174, December 2018, Pages 354-362
نویسندگان
Vinay Sharma, Vishal Thakur, Niti Kant,