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Realization of a free-space frequency modulated DFB-laser-based laser for measurement of distances and velocities
Umeå University, Faculty of Science and Technology, Department of Physics.
2015 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The report describes the realization and performance test for distance and velocity measurement of two frequency modulated continuous wave (FMCW) laser radar setups(referred to as basic and advanced system), both setups are based on free-space-optics.With a different sweep frequency the measurement ability of the free-space system was different. For the basic system, the result of measurement was better with 100Hz sweep frequency while the 50 Hz was the most suitable sweep frequency of the advanced system to measure distances and velocities. Comparing the results of measurements, the advanced system was more accurate than the basic system. The standard deviation of the advanced system was smaller than the basic system, but the basic system was easier to construct. For the most accurate results, the smallest shift in the distance we can assess was 0.01 mm for the advanced system and 0.2 mm for the basic system. The velocity resolution was 0.01 mm/s for the basic system and 3x10-3  mm/s for the advanced system.

Place, publisher, year, edition, pages
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:umu:diva-117075OAI: diva2:904764
Subject / course
Fysik C - Examensarbete
Available from: 2016-02-19 Created: 2016-02-19 Last updated: 2016-02-19Bibliographically approved

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