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Table 1
Measured profile parameters and simulated raw null depth for the four manufactured L-band AGPMs, and comparison with the optimal design.
| Name | Period Λ | Fill F | Depth h | Angle α | N theo |
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| AGPM-L1 | 1.42 μm | 0.35 | 4.2 μm | 2.40° | 0.0267 |
| AGPM-L2 | 1.42 μm | 0.36 | 3.6 μm | 2.65° | 0.0116 |
| AGPM-L3 | 1.42 μm | 0.44 | 5.8 μm | 3.25° | 0.0048 |
| AGPM-L4 | 1.42 μm | 0.41 | 4.7 μm | 3.10° | 0.0010 |
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| Optimum | 1.42 μm | 0.45 | 5.2 μm | 2.95° | 0.0005 |
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