Electrical source of pseudothermal light

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...

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Bibliographic Details
Published in:American journal of physics 2018-06, Vol.86 (6), p.475-478
Main Author: Kuusela, Tom A.
Format: Article
Language:English
Subjects:
Electric properties
Holography
Integrated circuits
Light emitting diodes
Light sources
Lighting
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Description
Summary: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.
ISSN:0002-9505
1943-2909
DOI:10.1119/1.5029829