A new class of sources presenting structured coherence properties is introduced and analyzed. They are obtained as the incoherent superposition of coherent Laguerre-Gaussian modes with suitable coefficients. This ensures that the shape of the intensity profile and the spatial coherence features of the propagated beams are invariant during paraxial approximation. A simple analytical expression is obtained for the cross-spectral density of the sources of this class, regardless of the number of superposed modes. Properties of these sources are analyzed and described by several examples.
Martinez-Herrero, R., Santarsiero, M., Piquero, G., Gonzalez de Sande, J.C. (2021). A new type of shape-invariant beams with structured coherence: laguerre-christoffel-darboux beams. PHOTONICS, 8(4), 134 [10.3390/photonics8040134].
A new type of shape-invariant beams with structured coherence: laguerre-christoffel-darboux beams
Santarsiero M.
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2021-01-01
Abstract
A new class of sources presenting structured coherence properties is introduced and analyzed. They are obtained as the incoherent superposition of coherent Laguerre-Gaussian modes with suitable coefficients. This ensures that the shape of the intensity profile and the spatial coherence features of the propagated beams are invariant during paraxial approximation. A simple analytical expression is obtained for the cross-spectral density of the sources of this class, regardless of the number of superposed modes. Properties of these sources are analyzed and described by several examples.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
