Refining the performance of mid-IR CPA laser systems based on Fe-doped chalcogenides for nonlinear photonics

Pushkin, A.V.; Potemkin, F.V.

Авторы: Pushkin A.V., Potemkin F.V.
Журнал: Photonics
Том: 10
Номер: 12
Год издания: 2023
Первая страница: 1375
DOI: 10.3390/photonics10121375
Аннотация: The chirped pulse amplification (CPA) systems based on transition-metal-ion-doped chalcogenide crystals are promising powerful ultrafast laser sources providing access to sub-TW laser pulses in the mid-IR region, which are highly relevant for essential scientific and technological tasks, including high-field physics and attosecond science. The only way to obtain high-peak power few-cycle pulses is through efficient laser amplification, maintaining the gain bandwidth ultrabroad. In this paper, we report on the approaches for mid-IR broadband laser pulse energy scaling and the broadening of the gain bandwidth of iron-doped chalcogenide crystals. The multi-pass chirped pulse amplification in the Fe:ZnSe crystal with 100 mJ level nanosecond optical pumping provided more than 10 mJ of output energy at 4.6 μm. The broadband amplification in the Fe:ZnS crystal in the vicinity of 3.7 μm supports a gain band of more than 300 nm (FWHM). Spectral synthesis combining Fe:ZnSe and Fe:CdSe gain media allows the increase in the gain band (~500 nm (FWHM)) compared to using a single active element, thus opening the route to direct few-cycle laser pulse generation in the prospective mid-IR spectral range. The features of the nonlinear response of carbon nanotubes in the mid-IR range are investigated, including photoinduced absorption under 4.6 μm excitation. The study intends to expand the capabilities and improve the output characteristics of high-power mid-IR laser systems.
Добавил в систему: Потёмкин Фёдор Викторович

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Refining the performance of mid-IR CPA laser systems based on Fe-doped chalcogenides for nonlinear photonicsстатья

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