A broad class of partially coherent non-stationary fields can be expressed in
terms of the recently proposed independent-elementary-pulse model. In this work
we first introduce a corresponding dual representation in the frequency domain
and then extend this concept by considering shifted and weighted elementary
spectral coherence functions. We prove that this method, which closely describes
practical optical systems, leads to properly defined correlation functions. As
an example, we demonstrate that our new model characterizes, in a natural way,
trains of ultra-short pulses, affected by noise and timing jitter, emitted by
usual modulators employed in telecom applications.
©2007 Optical Society of America
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