A1 Refereed original research article in a scientific journal
Electrical source of pseudothermal light
Authors: Tom A. Kuusela
Publisher: AMER ASSOC PHYSICS TEACHERS
Publication year: 2018
Journal: American Journal of Physics
Journal name in source: AMERICAN JOURNAL OF PHYSICS
Journal acronym: AM J PHYS
Volume: 86
Issue: 475
First page : 475
Last page: 478
Number of pages: 4
ISSN: 0002-9505
eISSN: 1943-2909
DOI: https://doi.org/10.1119/1.5029829
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/32053938
Abstract
We describe a simple and compact electrical version of a pseudothermal light source. The source is based on electrical white noise whose spectral properties are tailored by analog filters. This signal is used to drive a light-emitting diode. The type of second-order coherence of the output light can be either Gaussian or Lorentzian, and the intensity distribution can be either Gaussian or non-Gaussian. The output light field is similar in all viewing angles, and thus, there is no need for a small aperture or optical fiber in temporal coherence analysis. (C) 2018 American Association of Physics Teachers.
We describe a simple and compact electrical version of a pseudothermal light source. The source is based on electrical white noise whose spectral properties are tailored by analog filters. This signal is used to drive a light-emitting diode. The type of second-order coherence of the output light can be either Gaussian or Lorentzian, and the intensity distribution can be either Gaussian or non-Gaussian. The output light field is similar in all viewing angles, and thus, there is no need for a small aperture or optical fiber in temporal coherence analysis. (C) 2018 American Association of Physics Teachers.
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