DLR - Institute of Technical Physics

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Key Topics of the Institute

Laser-based detection and orbit manipulation of space debris

DLR researchers at the Institute of Technical Physics are working on a laser-based optical tracking method to precisely determine the trajectories of space debris. Using these orbit data, satellites can perform specific avoidance manoeuvres. To determine the orbit of the pieces of debris, they are tracked by an optical telescope and simultaneously irradiated with laser pulses. A few milliseconds later, a weak reflection of the laser light returns from the objects. With the propagation time of the laser pulses and the position of the object in space, DLR researchers can determine the trajectory to within a few metres. In order to avoid collisions between dead satellites and space debris, the trajectories of objects need to be manipulated. For this purpose, laser systems and high-precision laser tracking methods are being developed at the Institute of Technical Physics, which allow to slightly change the trajectories on case of a collision warning.

Long-range laser effectors

In the development of laser effectors at the Institute of Technical Physics, the focus is on the optimisation of the beam quality of solid state lasers – in particular thin disk lasers – in continuous wave or pulsed operation, as well as their power scaling in the multi-kilowatt range. Depending on their power, these laser effectors have a wide range of applications in the transmission of energy by laser beam over long distances.

Laser-based flight instruments

Pilots need absolutely reliable information with regard to flight attitude, speed and atmospheric conditions like outside temperatures. To supplement conventional sensor systems, the Institute of Technical Physics develops and evaluates laser-based optical sensor systems which offer higher precision and reliability. Beside techniques of laser spectroscopy, the scientists also investigate laser anemometry.