Revisiting Raman lidar: Application of new techniques to improve system performance
- Brookhaven National Lab., Upton, NY (United States). Dept. of Advanced Technology
BNL has been developing a remote sensing technique for the detection of atmospheric pollutants using resonance Raman lidar that has also incorporated a number of new techniques/technologies designed to extend it performance envelope. Chief among these new techniques is the use of pattern recognition to take advantage of the spectral fingerprint and a new laser frequency modulation technique, referred to as Frequency Modulated Excitation Raman Spectroscopy (FreMERS), designed to suppress broadband fluorescence. In the laboratory, broadband fluorescence suppression approaching 3 orders-of-magnitude has been achieved. In addition, the application of a BNL designed knife-edge Rayleigh filter has also been demonstrated using the lidar system where spectral features as close as 200 cm{sup {minus}1} from the excitation line were observed. How all these features help increase the overall performance of Raman lidar will be discussed.
- OSTI ID:
- 492296
- Report Number(s):
- CONF-960848--; ISBN 0-8194-2221-5
- Country of Publication:
- United States
- Language:
- English
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