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Моделирование распространения фемтосекундного импульса в среде с частотной дисперсией

Моделирование распространения фемтосекундного импульса в среде с частотной дисперсией

Abstract

An algorithm for solving the wave equation for the TE polarization, which is taking into account the frequency dispersion of the material and using the explicit difference scheme, is proposed. Analysis of the numerical simulation of propagation of femtosecond rectangular pulse in a quartz allowed to find precursors that come to the observation point for 1.4 times faster than the main pulse and the intensity of this precursors is in 700 times smaller than the intensity of the main pulse. The calculated delay time of Sommerfeld and Brillouin precursors differents from the theoretical to 7%.

Предложен алгоритм решения волнового уравнения для ТЕ-поляризации с учётом частотной дисперсии материала, с помощью явной разностной схемы. Анализ численного моделирования распространения прямоугольного фемтосекундного импульса в кварце позволил обнаружить предвестники, которые приходят в точку наблюдения раньше основного импульса в 1,4 раза и по интенсивности в 700 раз меньше его. Рассчитанное время задержки предвестников Зоммерфельда и Бриллюэна отличается от теоретического на 7%.

Keywords

МАТЕМАТИЧЕСКАЯ МОДЕЛЬ, ВОЛНОВОЕ УРАВНЕНИЕ, ЧАСТОТНАЯ ДИСПЕРСИЯ, МОДЕЛЬ СЕЛЛМЕЙЕРА, ФЕМТОСЕКУНДНЫЙ ПРЯМОУГОЛЬНЫЙ ИМПУЛЬС, SELLMEYER’S MODEL

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold