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Nonlinear refraction and absorption properties of optical materials for high-peak-power long-wave-infrared lasers

Optical Materials Express, ISSN: 2159-3930, Vol: 14, Issue: 3, Page: 696-714
2024
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Optical materials transparent in the CO laser wavelength range have been evaluated regarding their suitability for components in ultrashort-pulse (≤ a few ps), high-peak-power (≥ a few TW) long-wave infrared (LWIR) lasers. We provide values for the nonlinear refractive index (n) for seventeen materials, and onsets for nonlinear absorption for eleven materials. Characterizations were performed using a 2 ps laser pulse at λ = 9.2 µm. This paper methodically presents the newly acquired data in conjunction with existing literature on linear optical properties, establishing it as a comprehensive reference for designing high-peak-power LWIR laser systems.

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