Rotational frequency shifts in partially coherent optical fields.
We study the frequency shifts taking place when a random, stationary optical field rotates with respect to an observer. The field is expanded in terms of fully coherent Laguerre-Gaussian basis modes, for which the rotational frequency shifts have been studied previously. We demonstrate the formalism by considering the spectrum of a Gaussian Schell-model field, and show that for a spatially highly incoherent field, significant spectral changes can be expected.
Hautakorpi
M
M
Optics and Molecular Materials, Helsinki University of Technology, Finland. Hautakorpi@tkk.fi
Lindberg
J
J
Setälä
T
T
Kaivola
M
M