Real-time χ^(2) evolution in twin-hole fiber during thermal poling and repoling
Bibliographic record
Abstract
We report the real-time evolution of the second-order nonlinearity χ(2) induced in a twin-hole fiber during its first thermal poling and the subsequent repoling after thermal erasure. The considerable difference in the χ(2) evolution in the two poling processes indicates that the first poling has a strong history effect on the repoling. We use a two-charge dynamics model involving a fast charge carrier Na+ and a slow charge carrier H+ to model the χ(2) evolution in both poling processes. We quantitatively show that the difference in χ(2) evolution is due to the different initial charge distributions before each poling. The extra H+ ions injected into the fiber during the first poling change the initial charge distribution in the second poling, which leads to a different χ(2) dynamic.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".