Photonic phase correctors based on grating couplers: proof of concept simulations and preliminary performance metrics
Bibliographic record
Abstract
We report on simulations carried out for an integrated phase corrector that can efficiently couple the light distorted by atmospheric turbulence into a single-mode fiber (SMF). The photonic integrated circuit (PIC) consists of a square array of surface grating couplers used to deflect the off-plane wave vector of the free-space beamlets into the plane of a single-mode waveguide in the chip. Resistive elements acting as heaters are subsequently used to stretch a coiled section of the individual waveguides and, in doing so, shift the phase of the propagating modes. With the correct phase shifts applied to the channels — each corresponding to a subaperture on a telescope pupil — the channels can be coherently combined, and the collected light can be delivered to one output SMF. In an adaptive optics (AO) system, the phase corrector would act as a deformable mirror (DM) commanded by a controller that takes phase measurements from a wavefront sensor (WFS).
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".