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. 2019 Apr 26;10:1865. doi: 10.1038/s41467-019-09840-4

Fig. 3.

Fig. 3

Measured optical fields at 1565 nm. a Measurement apparatus based on off-axis digital holography. b Composite image of the full set of 210 modes. Azimuthal index runs left-to-right, mode-group runs top-to-bottom. c Select modes of various order