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Measurement of the emission spectrum from a super luminescent white diode with a Fourier transform spectrometer
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]

A Fourier transform spectrometer (FTS) was constructed to analyze the light of a white LED. The spectrometer utilizes re-sampling with the help of a reference interferogram from a HeNe laser. The resolution was estimated from the measured line width of the re-sampled HeNe laser and was found to be in the order of 0.4 nm. The spectrum collated from the white diode had a signal to noise ratio of 350 which was more than sufficient for our purposes. The measured spectrum point towards the light being produced by a combination of red and blue LED:s and a phosphor layer of YAG:Ce providing the green-yellow colors.

Place, publisher, year, edition, pages
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:umu:diva-117082OAI: diva2:904807
Subject / course
Fysik C - Examensarbete
Available from: 2016-02-19 Created: 2016-02-19 Last updated: 2016-02-19Bibliographically approved

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