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Proceedings Paper

CO2 laser for spaceborne Doppler wind lidar
Author(s): David V. Willetts; Michael R. Harris; Errico Armandillo; Callum J. Norrie; Paul M. Schwarzenberger; Steven Wallace; Wolfgang Schaeper; Matthias Gollor; Enrico Galletti; Emanuele S.E. Stucchi
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Paper Abstract

The transmitter laser is recognised to be one of the most critical technologies for space-based Doppler windlidar [1]. We present initial evaluation of the performance of an e-beam sustained device in the 1OJ, 10 Hz class. Lifetime issues are addressed in a subsidiary paper. We describe the design of the device and the results of a number of characterisation studies: 1) General nonoptical tests of gas circulation and heat exchanger efficiency. 2) Performance optimisation to maximise multimode efficiency as a function of energy loading, main discharge E/N and gas composition, all tests allowed for optimisation of cavity extraction. 3) Characterisation of the novel plasma anode electron gun with respect to beam uniformity, secondary electron concentration, and current constancy. 4) Optical characterisation to examine operating wavelength, pulse shape, beam profile in the near and far-field, output energy and electrical to optical conversion efficiency, and frequency behaviour during the pulse.

Paper Details

Date Published: 9 December 1994
PDF: 9 pages
Proc. SPIE 2310, Lidar Techniques for Remote Sensing, (9 December 1994); doi: 10.1117/12.195863
Show Author Affiliations
David V. Willetts, Defense Research Agency Malvern (United Kingdom)
Michael R. Harris, Defense Research Agency Malvern (United Kingdom)
Errico Armandillo, European Space Agency/ESTEC (Netherlands)
Callum J. Norrie, European Space Agency/ESTEC (Netherlands)
Paul M. Schwarzenberger, GEC Hirst Research Ctr. (United Kingdom)
Steven Wallace, GEC Hirst Research Ctr. (United Kingdom)
Wolfgang Schaeper, Dornier GmbH (Germany)
Matthias Gollor, Dornier GmbH (Germany)
Enrico Galletti, CISE SpA (Italy)
Emanuele S.E. Stucchi, CISE SpA (Italy)

Published in SPIE Proceedings Vol. 2310:
Lidar Techniques for Remote Sensing
Christian Werner, Editor(s)

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