Spectral Region for Laser Isotope Measurements of Gases

A mid-infrared wave-number range has been identified as being useful for laser measurements of CO and CO2 gases that contain various combinations of isotopes of C and O. The isotopic species are 12C16O (common CO), 13C16O, 12C18O, 16O12C18O,12C16O2 (common CO2), and 13C16O2.