Electrical source of pseudothermal light

: Tom A. Kuusela

Publisher: AMER ASSOC PHYSICS TEACHERS

: 2018

: American Journal of Physics

: AMERICAN JOURNAL OF PHYSICS

: AM J PHYS

: 86

: 475

: 478

: 4

: 0002-9505

: 1943-2909

DOI: https://doi.org/10.1119/1.5029829

: https://research.utu.fi/converis/portal/detail/Publication/32053938

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.

AJP 86-475-2018.pdf