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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 15 — May. 20, 1997
  • pp: 3469–3474

Time-dependent attenuator for dynamic range reduction of lidar signals

Stefan Lehmann, Volker Wulfmeyer, and Jens Bösenberg  »View Author Affiliations


Applied Optics, Vol. 36, Issue 15, pp. 3469-3474 (1997)
http://dx.doi.org/10.1364/AO.36.003469


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Abstract

A time-dependent variable attenuator to reduce the dynamic range of lidar signals is introduced. The attenuator consists of a Pockels cell between two crossed polarizers that is incorporated into the receiving optic. The transmission is controlled electronically to attenuate the large signals from close ranges but to transmit far-range signal returns to their full extent. The signal dynamic range has been reduced by more than a factor of 100. Reproducibility and the effect of different rise times on the variable transmission are investigated. It is found that the attenuation is highly reproducible, and the associated statistical error remains below the detection limit of 10-3. Systematic errors in differential absorption lidar (DIAL) measurements are negligible for relative wavelength differences between on-line and off-line Δλ/λ < 0.1%. Otherwise it is shown how these can be corrected. We used the attenuator to adapt the measured range to the heights of interest by increasing the electronic gain or to extend the range considerably to lower heights. It is estimated that with this variable attenuator a height range of 0.2–10 km can be covered with one data-acquisition channel only.

© 1997 Optical Society of America

History
Original Manuscript: January 16, 1996
Revised Manuscript: October 24, 1996
Published: May 20, 1997

Citation
Stefan Lehmann, Volker Wulfmeyer, and Jens Bösenberg, "Time-dependent attenuator for dynamic range reduction of lidar signals," Appl. Opt. 36, 3469-3474 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-15-3469


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References

  1. R. M. Schotland, “Errors in the lidar measurement of atmospheric gases by differential absorption,” J. Appl. Meteorol. 13, 71–77 (1974). [CrossRef]
  2. R. T. H. Collis, P. B. Russel, “Lidar measurement of particles and gases by elastic backscattering and differential absorption,” in Laser Monitoring of the Atmosphere (Springer, New York, 1976), pp. 71–151. [CrossRef]
  3. E. E. Remsberg, L. L. Gordley, “Analysis of differential absorption lidar from the Space Shuttle,” Appl. Opt. 17, 624–628 (1978). [CrossRef] [PubMed]
  4. R. M. Measures, Laser Remote Sensing (Wiley, New York, 1984).
  5. G. J. Mégie, G. Ancellet, J. Pelon, “Lidar measurements of ozone vertical profiles,” Appl. Opt. 24, 3454–3463 (1985). [CrossRef] [PubMed]
  6. U. Kempfer, W. Carnuth, R. Lotz, T. Trickl, “A wide-range ultra-violet lidar system for tropospheric ozone measurements: development and application,” Rev. Sci. Instrum. 65, 3145–3164 (1994). [CrossRef]
  7. P. A. Wissel, “Design, construction, and performance evaluation of a gain-switched amplifier for lidar applications,” Ph.D. dissertation (University of Arizona, Tucson, 1983).
  8. J. Harms, W. Lahmann, C. Weitkamp, “Geometrical compression of lidar return signals,” Appl. Opt. 17, 1131–1135 (1978). [CrossRef] [PubMed]
  9. J. Harms, “Lidar return signals for coaxial and noncoaxial systems with central obstruction,” Appl. Opt. 18, 1559–1566 (1979). [CrossRef] [PubMed]
  10. Y. Zhao, R. M. Hardesty, M. J. Post, “Multibeam transmitter for signal dynamic range reduction in incoherent lidar systems,” Appl. Opt. 31, 7623–7632 (1992). [CrossRef] [PubMed]
  11. K. W. Rothe, H. Walther, J. Werner, “Differential-absorption measurements with fixed-frequency IR and UV lasers,” in Optical and Laser Remote Sensing (Springer, New York, 1983), pp. 10–16. [CrossRef]
  12. S. McDermid, D. A. Haner, M. M. Kleinman, T. D. Walsh, M. L. White, “Differential absorption lidar systems for tropospheric and stratospheric ozone measurements,” Opt. Eng. 30, 22–30 (1991). [CrossRef]
  13. D. P. J. Swart, J. Spakman, H. B. Bergwerff, “RIVM’s stratospheric ozone lidar for NDSC station Lauder: system description and first results,” in 17th International Laser Radar Conference Abstracts of Papers (1994), p. 405.
  14. S. Ismail, E. V. Browell, “Airborne and spaceborne lidar measurements of water vapour profiles: a sensitivity analysis,” Appl. Opt. 28, 3603–3615 (1989). [CrossRef] [PubMed]
  15. A. Ansmann, “Errors in ground-based water-vapor DIAL measurements due to Doppler-broadened Rayleigh backscattering,” Appl. Opt. 24, 3476–3480 (1985). [CrossRef] [PubMed]
  16. V. Wulfmeyer, J. Bösenberg, S. Lehmann, C. Senff, S. Schmitz, “Injection-seeded alexandrite ring laser: performance and application in a water vapor differential absorption lidar,” Opt. Lett. 20, 638–640 (1995). [CrossRef] [PubMed]
  17. A. Yariv, Optical Electronics (Holt-Saunders, New York, 1985), pp. 291–294.
  18. Pockels Electro-Optic Effect Information Sheet (Cleveland Crystals, Inc., Cleveland, Ohio, 1976).

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