Abstract
Laser radiation in the wavelength region around 2 μm is required for its specific properties. It is strongly absorbed in water and tissue and therefore it is very suitable for some medical applications. There are also absorption bands of various atmospheric gases, and this radiation can therefore be used for remote sensing. Optical parametric oscillators based on nonlinear optical crystals pumped by 2 μm radiation can be used to generate ultrafast pulses in the mid-IR region.
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