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Comparison of an InSb detector and upconversion detector for infrared polarization spectroscopy

Rasmus L. Pedersen et al., Applied Spectroscopy 72, pp. 793 – 797 (2018)
Comparison of an InSb Detector and Upconversion Detector for Infrared Polarization Spectroscopy using NLIR technology as in Applied Spectroscopy, 2018

NLIR enabling infrared polarization spectroscopy with high SNR

This paper compares the signal-to-noise ratio obtained using an InSb photodiode for infrared (IR) polarization spectroscopy to that obtained using an upconversion detector, and shows a factor 64 improvement by the change. Upconversion detection is based on using sum frequency generation to move the IR optical signal to near-visible wavelengths to improve the sensitivity.

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