Sensing of kerogens and lignens using laser-induced fluorescence at deep-UV wavelengths

Narasimha S. Prasad; Richard E. Davis; Upendra N. Singh

doi:10.1117/12.621257

12 September 2005 Sensing of kerogens and lignens using laser-induced fluorescence at deep-UV wavelengths

Narasimha S. Prasad, Richard E. Davis, Upendra N. Singh

Proceedings Volume 5887, Lidar Remote Sensing for Environmental Monitoring VI; 58870R (2005) https://doi.org/10.1117/12.621257
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Chemical and biological (Chem-Bio) sensors for detection and tracking of hazardous and toxic agents are primarily being developed for homeland security and defense applications at various government laboratories and research institutions. However, several groups at NASA and various universities are working on similar sensors for space-based applications. The quest for answers to questions on the origins of life on the Martian enironment is continuing at NASA. Recent studies on a Martian meteorite have kindled interest in the possibilities of past life on Mars. The existance of polycyclic aromatic hydrocarbons in fresh fracture surfaces have promoted further studies to examine the evidence for possibilities of the existenc of life on Martian surface soil in the past. Lignins and kerogens containing aromatic and polyaromatic components which are considered precursors of life on Mars. Likwise, tholins are considered possible precurors for life on some outerbodies in our Solar system. Laser induced Fluorescence (LIF) and Raman based techniques with emphasis in the deep ultraviolet (UV) (200-300 nm) spectral region are anticipated to play a significant role in characterizing these precursors. In this paper, previous stuides done on these precursors in the UV are examined for the development of a wavelength agile LIF system for in situ and remote sensing experiments in the deep-UV spectral region.

Citation Download Citation

Narasimha S. Prasad, Richard E. Davis, and Upendra N. Singh "Sensing of kerogens and lignens using laser-induced fluorescence at deep-UV wavelengths", Proc. SPIE 5887, Lidar Remote Sensing for Environmental Monitoring VI, 58870R (12 September 2005); https://doi.org/10.1117/12.621257

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