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Influence of wave-front curvature on supercontinuum energy during filamentation of femtosecond laser pulses in waterстатья
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: 10 апреля 2018 г.
- Авторы: Potemkin F.V., Mareev E.I., Smetanina E.O.
- Журнал: Physical Review A - Atomic, Molecular, and Optical Physics
- Том: 97
- Год издания: 2018
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 033801
- DOI: 10.1103/PhysRevA.97.033801
- Аннотация: We demonstrate that using spatially divergent incident femtosecond 1240-nm laser pulses in water leads to an efficient supercontinuum generation in filaments. Optimal conditions were found when the focal plane is placed 100-400 um before the water surface. Under sufficiently weak focusing conditions [numerical aperture (NA<0.2)] and low-energy laser pulses, the supercontinuum energy generated in divergent beams is higher than the supercontinuum energy generated in convergent beams. Analysis by means of the unidirectional pulse propagation equation shows a dramatic difference between filamentation scenarios of divergent and convergent beams, that explains corresponding features of the supercontinuum generation. Under strong focusing conditions (NA>=0.2) and high-energy laser pulses, the supercontinuum generation is suppressed for convergent beams in contrast to divergent beams that nevertheless are shown experimentally to allow supercontinuum generation. The presented technique of the supercontinuum generation in divergent beams in water is highly demanded in a development of femtosecond optical parametric amplifiers.
- Добавил в систему: Потёмкин Фёдор Викторович