Comparing mode-crosstalk and mode-dependent loss of laterally displaced orbital angular momentum and Hermite-Gaussian modes for free-space optical communication.
Opt Lett
; 42(20): 4175-4178, 2017 Oct 15.
Article
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| MEDLINE
| ID: mdl-29028041
ABSTRACT
There is interest in using orbital angular momentum (OAM) modes to increase the data speed of free-space optical communication. A prevalent challenge is the mitigation of mode-crosstalk and mode-dependent loss that is caused by the modes' lateral displacement at the data receiver. Here, the mode-crosstalk and mode-dependent loss of laterally displaced OAM modes (LG0,+1, LG0,-1) are experimentally compared to that of a Hermite-Gaussian (HG) mode subset (HG0,1, HG1,0). It is shown, for an aperture larger than the modes' waist sizes, some of the HG modes can experience less mode-crosstalk and mode-dependent loss when laterally displaced along a symmetry axis. It is also shown, over a normal distribution of lateral displacements whose standard deviation is 2× the modes' waist sizes, on average, the HG modes experience 66% less mode-crosstalk and 17% less mode-dependent loss.
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01-internacional
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MEDLINE
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En
Revista:
Opt Lett
Año:
2017
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Article