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We report the wavelength dependency of third-order nonlinearity and multi-photon absorption of silicon in the spectral range from 1.6 µm to 6 µm, including the nonlinear figure of merit [1].
The gain bandwidth of Ho-doped crystals is sufficiently broad to support femtosecond operation, which would allow pumping of ultrashort-pulse mid-IR optical parametric amplifiers (OPAs) [1,2] and, upon reaching adequate peak powers, eye-safe filamentation in the >2-μm transparency window of the atmosphere. In this contribution, we report on, to our knowledge, the first demonstration of a femtosecond...
Femtosecond Tm-fiber-laser-pumped Ho:YAG room-temperature CPA system delivering scalable multi-mJ multi-kHz pulses with a bandwidth exceeding 12 nm and the average power of 15 W is developed. Recompressed 530-fs pulses are suitable for broadband WL generation in transparent solids.
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