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Proceedings Paper

Laser beam propagation experiments along and across a jet engine plume
Author(s): Markus Henriksson; Lars Sjöqvist; Dirk Seiffer; Norbert Wendelstein; Erik Sucher
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Paper Abstract

Airplane based laser systems for DIRCM, active imaging and communication are important applications attracting considerable interest. The performance of these systems in directions where the laser beam points close to or through the exhaust plume from the jet engines may be severely reduced. A trial to study these phenomena using a downscaled jet-engine test rig was carried out. The results on propagation of laser beams along and across the plume from these trials are presented. For laser beams propagation along the engine axis an OPO based source producing co-propagating laser beams at 1.52 and 3.56 μm was used. The beams were projected on a screen and imaged with separate IR cameras to study beam wander and spot degradation. Propagation across the plume was studied with a 532 nm laser projected on a screen and imaged by a high speed camera. The engine thrust and the distance between the engine nozzle and the laser beams were varied to study the effects of changing conditions. Scaling to full size engines and performance implications for DIRCM is discussed.

Paper Details

Date Published: 2 October 2008
PDF: 10 pages
Proc. SPIE 7115, Technologies for Optical Countermeasures V, 71150E (2 October 2008); doi: 10.1117/12.799202
Show Author Affiliations
Markus Henriksson, FOI-Swedish Defence Research Agency (Sweden)
Lars Sjöqvist, FOI-Swedish Defence Research Agency (Sweden)
Dirk Seiffer, Forschungsinstitut für Optronik und Mustererkennung (Germany)
Norbert Wendelstein, Forschungsinstitut für Optronik und Mustererkennung (Germany)
Erik Sucher, Forschungsinstitut für Optronik und Mustererkennung (Germany)

Published in SPIE Proceedings Vol. 7115:
Technologies for Optical Countermeasures V
David H. Titterton; Mark A. Richardson, Editor(s)

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