Spatiotemporal modulation instability as off-axis parametric amplification: insights from the phase

Zheltikov, A.M.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 2 декабря 2016 г.

Автор: Zheltikov A.M.
Журнал: Optics Express
Том: 24
Год издания: 2016
Издательство: Optical Society of America
Местоположение издательства: United States
Первая страница: 20716
Последняя страница: 20723
DOI: 10.1364/OE.24.020716
Аннотация: The canonical linear-stability analysis of spatiotemporal modulation instability (MI), which treats MIs as instabilities of the steady-state solution of the field evolution equation with respect to weak complex harmonic perturbations, is shown to be physically equivalent to a coupled-wave analysis of off-axis parametric amplification of the Stokes and anti-Stokes fields by an intense pump wave. With an appropriate space-evolution transfer matrix, a complex harmonic trial function used in the standard MI model translates into a pair of coupled off-axis waves, of which one is exponentially growing, while the other is exponentially decreasing, thus recovering a two-wave field structure that is inherent in the fields undergoing parametric amplification through four-wave mixing. Analysis of the phase of these fields offers useful physical insights into high-order dispersion effects in spatiotemporal MIs, suggests a physically transparent and accurate method to include high-order dispersion in MI gain calculations, and reveals new spatiotemporal MI effects induced by high-order dispersion.
Добавил в систему: Желтиков Алексей Михайлович

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