A procedure is described for calculating the power coupled between partially coherent waveguide fields that are in different states of coherence. The method becomes important when it is necessary to calculate the power transferred from a distributed source to a distributed load through a length of multimode metallic, or dielectric, waveguide. It is shown that if the correlations between the transverse components of the electric and magnetic fields of and are described by coherence matrices M and respectively, then the normalized average power coupled between them is where Tr denotes the trace. When the modal impedances are equal, this expression for the coupled power reduces to an equation derived in a previous paper [J. Opt. Soc. Am. A 18, 3061 (2001)], by use of thermodynamic arguments, for the power coupled between partially coherent free-space beams.
© 2002 Optical Society of AmericaFull Article | PDF Article
Stafford Withington and Ghassan Yassin
J. Opt. Soc. Am. A 18(12) 3061-3071 (2001)
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