DLR - Institute of Technical Physics - Atmospheric Propagation and Effect

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Atmospheric Propagation and Effect

The department of Atmospheric Propagation and Effect focuses on laser applications in the open atmosphere. Main topics are the use of laser radiation over long distances such as optical energy transmission (laser power beaming, laser-based air defence) and the remote detection of pollutants and hazardous substances. Atmospheric applications of laser radiation require precise knowledge of the weather and the predictability of the influence of atmospheric factors on the radiation field. Air turbulence can lead to deflection of a laser beam, changes to the intensity profile, for example, and the deterioration of the beam quality. Aerosols in the air cause radiation scattering and must therefore be taken into account from the point of view of eye protection against laser radiation. These effects are studied by the Institute of Technical Physics at the DLR optical test range at Lampoldshausen. The Atmospheric Propagation and Effect department thus combines expertise with regard to beam propagation, along with numerical simulation, with applications from the DLR cross-discipline topic of security.

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Phylax

Eine schnelle und zuverlässige Kontrolle von Personen auf Explosivstoffspuren zu ermöglichen ist die Vision des Projektes PHYLAX der Institute für Technische Physik und für Robotik und Mechatronik des Deutschen Zentrums für Luft- und Raumfahrt (DLR). PHYLAX steht hierbei für Personenbezogene hybride laserbasiert Explosivstoffdetektion.

Optical turbulence and micrometeorology

To evaluate the results from studies on atmospheric propagation and laser remote effects, the prevailing atmosphere properties are fully taken into account. The atmosphere acts on the laser radiation through its limited optical transmissivity, through the presence of aerosols and through turbulence induced refractive index fluctuations. The consequences are a general weakening of the power along the propagation path, a reduction of the radiation intensity at the target and reduced positioning accuracy. ...

Optical test range

While the development of laser sources is carried out in the laboratory, results for beam propagation and effects are only reliable if they are obtained under real environmental conditions. The DLR optical test range at Lampoldshausen allows the performance of measurements and experiments under real atmospheric conditions. Taking into account the current guidelines and standards for laser safety, the optical test range is part of the safety concept of the DLR site at Lampoldshausen....

Atmospheric propagation

The atmospheric propagation of laser radiation is of importance in a growing number of disciplines. These include optical communication, optical energy transmission (laser power beaming), satellite tracking and laser-based remote detection methods. The signal quality at long distances from the radiation source is determined by the laser characteristics and the effects of atmospheric turbulence on the laser radiation. These effects ...

Effect

The effect of high-energy laser radiation on various target structures and materials is diagnosed by a variety of measurement methods. In addition to conventional video technology and spatial and temporal temperature profile measurement, these also include infrared and high speed video on stationary and moving targets. To analyse ...

Laser based standoff detection

As part of security research laser-based standoff detection is concerned with the development and validation of systems for the detection of pollutants and hazardous substances on surfaces and in the air. CBRNE (chemical, biological, radiological, nuclear, explosive) substances may be inadvertently released by industrial accidents or due to natural disasters or intentional attacks. ...

Optical technologies for pandemic control

With the onset of the corona pandemic, the Institute of Technical Physics uses its expertise in the spectroscopy of biological substances to develop new ways of detecting viral pathogens.

Contact

Dr. rer. nat. Frank Duschek
Head of department Atmospheric Propagation and Effect
German Aerospace Center
Institute of Technical Physics, Atmospheric Propagation and Effect
Lampoldshausen-Hardthausen
Tel.: +49 6298 28-255
Fax: +49 6298 28-582