Аннотация
We study a coupled cavity laser configuration where a passively Q-switched Nd:YAG microchip laser is combined with an extended cavity, including a doped multimode fiber. For appropriate coupling levels with the extended cavity, we observed that beam self-cleaning was induced in the multimode fiber thanks to nonlinear modal coupling, leading to a quasi-single mode laser output. In the regime of beam self-cleaning, laser pulse duration was reduced from 525 to 225 ps. We also observed a Q-switched mode-locked operation, where spatial self-cleaning was accompanied by far-detuned nonlinear frequency conversion in the active multimode fiber.
Язык оригинала | английский |
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Страницы (с-по) | 22219-22227 |
Число страниц | 9 |
Журнал | Optics Express |
Том | 25 |
Номер выпуска | 19 |
DOI | |
Состояние | Опубликовано - 18 сен 2017 |