It is shown that for paraxially propagating beams of any state of coherence, the width changes along the propagation axis with the same law as that of a gaussian beam. A quality factor related to the rate of width change can then be defined. A formula expressing this quality factor in terms of the cross spectral density across the beam is derived.
Gori, F., Santarsiero, M., Sona, A. (1991). The change of width for a partially coherent beam on paraxial propagation. OPTICS COMMUNICATIONS, 82, 197-203.
The change of width for a partially coherent beam on paraxial propagation
SANTARSIERO, Massimo;
1991-01-01
Abstract
It is shown that for paraxially propagating beams of any state of coherence, the width changes along the propagation axis with the same law as that of a gaussian beam. A quality factor related to the rate of width change can then be defined. A formula expressing this quality factor in terms of the cross spectral density across the beam is derived.File in questo prodotto:
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