Partially coherent propagation-invariant beams: Passage through paraxial optical systems
- 1 June 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 43 (12) , 7079-7082
- https://doi.org/10.1103/physreva.43.7079
Abstract
The cross-spectral-density function characterizing a general propagation-invariant wave field satisfies the associated (planar) paraxial equation. Building on this result, we solve exactly the problem of the passage of such fields through arbitrary lossless optical systems characterized by their ABCD matrices. It is shown that the wave field remains shape invariant in all such systems, but that the property of strict propagation invariance is conserved only if the system is afocal.Keywords
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