Abstract

Isotopic measurements of methane are very important for environment. The level of gas in the atmosphere has significant impact on its radiative forcing, increase is estimated to 0.48 W/m² since pre-industrial times [1]. Isotopic ratio of carbon in CH₄ provides information about the origin of the gas. The recent development of compact interband cascade lasers (ICLs) permits the targeting of strong fundamental rotational-vibrational transitions absorption lines at room temperature conditions with wide wavelength span. Therefore it is possible to build compact, robust, field deployable gas sensors [3].

© 2017 IEEE