High range resolution laser scanner with full waveform recording

Dietmar Letalick; Håkan Larsson; Gustav Tolt; Lars Allard; Erika Wollner; Folke Berglund

doi:10.1117/12.864554

8 October 2010 High range resolution laser scanner with full waveform recording

Dietmar Letalick, Håkan Larsson, Gustav Tolt, Lars Allard, Erika Wollner, Folke Berglund

Proceedings Volume 7835, Electro-Optical Remote Sensing, Photonic Technologies, and Applications IV; 783505 (2010) https://doi.org/10.1117/12.864554
Event: SPIE Security + Defence, 2010, Toulouse, France

Abstract

This paper describes the development of a high resolution waveform recording laser scanner and presents results obtained with the system. When collecting 3-D data on small objects, high range and transverse resolution is needed. In particular, if the objects are partly occluded by sparse materials such as vegetation, multiple returns from a single laser pulse may limit the image quality. The ability to resolve multiple echoes depends mainly on the laser pulse width and the receiver bandwidth. With the purpose to achieve high range resolution for multiple returns, we have developed a high performance 3-D LIDAR, called HiPer, with a short pulse fibre laser (500 ps), fast detectors (70 ps rise time) and a 20 GS/s oscilloscope for fast sampling. HiPer can acquire the full waveform, which can be used for off-line processing. This paper will describe the LIDAR system and present some image examples. The signal processing will also be described, with some examples from the off-line processing and the benefit of using the complete waveform.

Citation Download Citation

Dietmar Letalick, Håkan Larsson, Gustav Tolt, Lars Allard, Erika Wollner, and Folke Berglund "High range resolution laser scanner with full waveform recording", Proc. SPIE 7835, Electro-Optical Remote Sensing, Photonic Technologies, and Applications IV, 783505 (8 October 2010); https://doi.org/10.1117/12.864554

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KEYWORDS

Sensors

Laser scanners

Pulsed laser operation

Oscilloscopes

LIDAR

Polarization

Picosecond phenomena

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