Open path near-infrared absorption spectroscopy of oxygen

CHED 195

Joshua M. Eichhorn, aeichhorn@harding.edu, Department of Physical Science, Harding University, HU 10409, 915 East Market Avenue, Searcy, AR 72149-0409
The low-pressure, low-temperature absorption spectrum of oxygen and some of its isotopes were measured by near-infrared diode laser absorption spectroscopy as part of a project to develop sensors for unmanned space missions. The measurements were carried out in a specially constructed Mars Atmosphere Simulation Chamber. Other measurements were made in the field over a path of one hundred meters. The signal to noise ratio was determined and the ability to measure oxygen isotopes was evaluated.