Fig. 1. (Color online) Measured and calculated response voltage of a DET10D InGaAs detector radiated by a blackbody heated to 673 , 973 and 1273 K respectively. A nominal aperture diameter of 3.2 mm is chosen. The scatterplot shows experiment results and the solid line is fitting results according to Eq. (8).

Fig. 2. (Color online) Measured and calculated response voltage of a DET10D InGaAs detector radiated by a 973 K blackbody with aperture diameter of 0.8, 1.6, 3.2, 6.4, 9.5, 12.7, 15.9 and 22.2 mm respectively. The scatterplot shows experiment results and the solid line is fitting results according to Eq. (8).

Fig. 3. (Color online) Measured and calculated response voltage of a DET10D InGaAs detector versus absolute distance. Red color shows the experimental and calculated data measured at the blackbody temperature of 1273 K and aperture diameter of 6.4 mm, while blue color corresponds to data obtained at the blackbody temperature of 573 K and aperture diameter of 1.6 mm.

Fig. 4. (Color online) The relationship between response voltage and aperture diameter. Square scatters show the response voltage plotted with a nominal aperture diameter, while solid squares represent experiment data plotted with corrected aperture diameter.

Fig. 5. (Color online) Measured and calculated response voltage (left axis) and the calculated responsivity (right axis) of the InGaAsSb detector as a function of absolute distance.