The mid-infrared (MIR) power level of 400 µW [1] at a wavelength of $\sim 18\mathrm{\mu m}$ was erroneously measured using a HgCdTe photoconductive detector. The detectivity of the HgCdTe detector was misunderstood when used with an amplifier. We have now measured the mid-infrared power with a thermal detector and have determined that the published power level was too high by a factor of 50. The correct MIR power generated from the two-color fiber laser systems would be just 8 µW.