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Construction of a free-space DFB-laser-based frequency modulated laser radar for measurement of distance and velocity
Umeå University, Faculty of Science and Technology, Department of Physics.
2016 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The aim of this experiment is to construct a frequency modulated laser radar for measuring the distance and velocity of an object. The system is based on a DFB laser and a heterodyne Michelson interferometer constructed by free space components. Using the laser radar we measure the position of an object in a 60 cm range with a maximum error of 2.6 mm, and the velocity of an object in 3 to 20 mm/s with a maximum error of 0.11 mm/s. The acquisition times are 60 ms and 120 ms for the position and velocity measurements respectively. Using Allan variance we estimate to have an absolute position detection sensitivity of 20 μm after ~200s of averaging.

Place, publisher, year, edition, pages
2016.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-122046OAI: oai:DiVA.org:umu-122046DiVA: diva2:936814
Subject / course
Fysik C - Examensarbete
Available from: 2016-06-14 Created: 2016-06-14 Last updated: 2016-06-14Bibliographically approved

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