Abstract
Infrared spectroscopic measurements are a key tool for species identification and substance detection. Growing importance falls to the mid-infrared 3 – 12 µm range, where strong, fundamental spectroscopic features are found. One issue especially in stand-off remote sensing scenarios with low-intensity backscattered signals is the limited sensitivity of available detectors for the (MIR) wavelength range. Upconversion of MIR radiation by nonlinear-optical sum frequency generation towards detection in the near near-infrared (NIR) range has been demonstrated as an approach to overcome this limitation [1].
© 2017 IEEE
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