Open Access
Table 1
Key requirements of the 4T-nuller.
| Property | Requirement |
|---|---|
| Operational wavelength range | 3.5–4.0 μm |
| Modal behavior | Single-mode |
| Photometric splitting | 20/80 |
| Interferometric splitting | 50/50 |
| Splitting spectral response | Achromatic |
| Optical throughput (w/o Fresnel loss) | ≈50% |
| Null level (raw/self-cala.) | 10−2/10−5 |
Notes. (a)The self-calibrated null ~10−5 corresponds to the state after post-processing, as described by Hanot et al. (2011) and Mennesson et al. (2011). It is not considered in this work.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.