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Generation of a Stable Femtosecond Supercontinuum in a Divergent Laser Beam for Time-Resolved Broadband Spectroscopy of Laser-Induced Processes in Matterстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 октября 2025 г.
- Авторы: Mareev E.I., Asharchuk N.M., Epifanov E.O., Potemkin F.V.
- Журнал: JETP Letters
- Том: 121
- Номер: 3
- Год издания: 2025
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 175
- Последняя страница: 181
- DOI: 10.1134/S002136402460383X
- Аннотация: Time-resolved absorption spectroscopy with subnanosecond time resolution requires sources of white light with short or ultrashort durations, which can be synchronized with other laser systems. Using a near-infrared femtosecond laser source, a supercontinuum with a high spectral brightness (~10 pJ/nm), a high pulse-to pulse stability of about 2–5%, and a long-term (several hours) stability has been generated in the spectral range of ~450–750 nm. These supercontinuum characteristics have been achieved by operating in a divergent beam, which makes it possible to avoid multiple filamentation, to stabilize the spectrum (halving fluctuations and a wider energy stability range), and to broaden it by changing the dynamic balance between Kerr focusing, plasma defocusing, and diffraction. Time resolution has been achieved by means of a specially developed electronic delay system based on field-programmable gate arrays, which has made it possible to achieve subnanosecond time resolution in a wide time window (up to several milliseconds). This technique has been successfully tested in experiments to study the dynamics of silicon ablation under nanosecond laser impact.
- Добавил в систему: Потёмкин Фёдор Викторович
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