Аннотация
We experimentally demonstrate that spatial beam self-cleaning can be highly efficient when obtained with a few-mode excitation in graded-index multimode optical fibers. By using 160 ps long, highly chirped (6 nm bandwidth at -3dB) optical pulses at 1562 nm, we demonstrate a one-decade reduction of the power threshold for spatial beam self-cleaning, with respect to previous experiments using pulses with laser wavelengths at 1030-1064 nm. Self-cleaned beams remain spatio-temporally stable for more than a decade of their peak power variation. The impact of input pulse temporal duration is also studied.
Язык оригинала | английский |
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Страницы (с-по) | 14333-14344 |
Число страниц | 12 |
Журнал | Optics Express |
Том | 28 |
Номер выпуска | 10 |
DOI | |
Состояние | Опубликовано - 11 мая 2020 |