Abstract
A procedure is described for calculating the power coupled between collimated, partially coherent vector fields that are in different states of coherence. This topic is of considerable importance in designing submillimeter-wave optical systems for astronomy. It is shown that if the incoming field has coherence matrix A, and the outgoing field has coherence matrix B, then the power coupled is simply where the elements of T project the basis functions of B onto those of A. A similar technique can be used to calculate the power coupled from the background of to . The scheme is illustrated by calculating the power coupled between two scalar, Gaussian Schell-model beams. The procedure can be incorporated into optical design software.
© 2001 Optical Society of America
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