부산대학교 도서관

An application of tunable diode laser absorption spectroscopy (TDLAS) in combination with integrated cavity output spectroscopy (ICOS) was proposed for Martian atmosphere study, and has been implemented as a Martian multichannel diode laser spectrometer, or M-DLS instrument. Before its scheduled delivery to the ExoMars-2020 Landing Platform, the M-DLS instrument has been carefully calibrated, representing optimal coupling of monochromatic DFB-lasers with the ICOS analytical volume, and radical enhancement of efficient optical path inside the ICOS, and resulting sub-percent accuracy for planned short-time and seasonal in situ measurement of D/H, 18 O/ 17 O/ 16 O, 13 C/ 12 C ratios and H 2 O, CO 2 content variations of gas probes, to be sampled from the extremely low-pressure atmosphere near the Martian surface during the ExoMars-2020 mission.