Independent-elementary-pulse representation for non-stationary fields.
We introduce a class of temporally partially coherent non-stationary wave fields, which can be represented with the aid of a packet of mutually independent, fully temporally coherent pulses of finite length. The spectral coherence properties of these pulses are determined. Fully coherent pulses and stationary fields are obtained from the model at the appropriate limits. Gaussian and exponential elementary pulses are considered as examples. Together with a Gaussian weight function they admit closed-form algebraic expressions for both temporal and spectral correlation functions and lead to Gaussian and Lorentzian spectra, respectively.
Vahimaa
Pasi
P
Turunen
Jari
J