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Proceedings Paper

Supercontinuum lidar applications for measurements of atmospheric constituents
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Paper Abstract

Recent advances in the field of supercontinuum lasers have provided a unique opportunity for developing lidar instruments that cover a wide spectral range. These instruments permit many simultaneous measurements of differential absorption spectra (DIAL and DAS techniques) to determine species density. Application of MODTRANTM 5 and other simulation software has allowed us to design and validate the findings of supercontinuum lidar systems developed at Penn State Lidar Laboratory. The multiple line differential absorption concepts have been demonstrated with various system topologies for a host of atmospheric windows in the visible to near infrared regions. During the past three years, we have developed and demonstrated several systems that are capable of measuring concentrations of various atmospheric constituents at background or elevated levels through long path absorption by transmitting only milliwatts of optical power. Our most recent supercontinuum lidar system utilizes a nanosecond supercontinuum laser fiber optically coupled to a transceiver system for remote sensing of atmospheric species concentrations. Due to the flexibility of the design, the operational prototype is currently being used to demonstrate the capability for accurately measuring real world open path atmospheric concentrations across the Penn State campus. The purpose of this study is to develop the technology and to demonstrate the capability for accurately measuring species concentrations without the complexities and uncertainties inherent in hyper-spectral remote sensing using the sun as a source, or the limitations and errors associated with using pairs of laser lines for DIAL measurements of each species. Initial simulations and measurements using this approach are presented.

Paper Details

Date Published: 16 April 2008
PDF: 11 pages
Proc. SPIE 6950, Laser Radar Technology and Applications XIII, 69500B (16 April 2008); doi: 10.1117/12.778255
Show Author Affiliations
David M. Brown, The Pennsylvania State Univ. (United States)
Zhiwen Liu, The Pennsylvania State Univ. (United States)
C. Russell Philbrick, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 6950:
Laser Radar Technology and Applications XIII
Monte D. Turner; Gary W. Kamerman, Editor(s)

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