Characterization of the NEP of mid-infrared upconversion detectors
We present a scheme to estimate the noise equivalent power (NEP) of the frequency upconversion detectors (UCDs), detecting mid-infrared (MIR) light. The NEP of the UCD is a combined contribution of NEPs from the upconversion process and from the photodetector, used for detecting the upconverted signal. The 2-5- μm MIR range is particularly investigated in this letter using a bulk periodically pole
