Figure 7 | Scientific Reports

Figure 7

From: Spatio-temporal coherence mapping of few-cycle vortex pulses

Figure 7

Multichannel vortex generation.

The grey value map was transferred into a phase map of SLM1 for the generation of a 2 × 2 array of thin spiral phase plates (circular areas) with a period of 260 pixels (2.1 mm). To reduce the background signal in the plane of interest, a checkered pattern (2 × 2 pixels per square) was applied to the passive areas between the phase plates (inset). The dark and bright part corresponds to a higher and lower effective refractive index, respectively.

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