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Proceedings Paper

Atmospheric propagation of high power laser radiation at different weather conditions
Author(s): Carsten Pargmann; Thomas Hall; Frank Duschek; Jürgen Handke
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Paper Abstract

Applications based on the propagation of high power laser radiation through the atmosphere are limited in range and effect, due to weather dependent beam wandering, beam deterioration, and scattering processes. Security and defense related application examples are countermeasures against hostile projectiles and the powering of satellites and aircrafts. For an examination of the correlations between weather condition and laser beam characteristics DLR operates at Lampoldshausen a 130 m long free transmission laser test range. Sensors around this test range continuously monitor turbulence strength, visibility, precipitation, temperature, and wind speed. High power laser radiation is obtained by a TruDisk 6001 disk laser (Trumpf company) yielding a maximum output power of 6 kW at a wavelength of 1030 nm. The laser beam is expanded to 180 mm and focused along the beam path. Power and intensity distribution are measured before and after propagation, providing information about the atmospheric transmission and alterations of diameter and position of the laser beam. Backscattered laser light is acquired by a photo receiver. As a result, measurements performed at different weather conditions show a couple of correlations to the characteristics of the laser beam. The experimental results are compared to a numerical analysis. The calculations are based on the Maxwell wave equation in Fresnel approximation. The turbulence is considered by the introduction of phase screens and the “von Karman” spectrum.

Paper Details

Date Published: 13 May 2016
PDF: 7 pages
Proc. SPIE 9833, Atmospheric Propagation XIII, 983302 (13 May 2016); doi: 10.1117/12.2223718
Show Author Affiliations
Carsten Pargmann, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Thomas Hall, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Frank Duschek, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Jürgen Handke, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)

Published in SPIE Proceedings Vol. 9833:
Atmospheric Propagation XIII
Linda M. Thomas; Earl J. Spillar, Editor(s)

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