<title>157-nm laser-induced modification of fused-silica glasses</title>
Why this work is in the frame
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Bibliographic record
Abstract
Bulk laser modification is reported for hydroxyl (OH), chlorine (Cl) and fluorine (F) containing fused-silica glasses irradiated with 157-nm F<SUB>2</SUB>-laser light. We detail the effects of OH, Cl and F concentration, as well as hydrogen (H<SUB>2</SUB>) loading, on compaction, refractive-index change, and color-center formation. Volume gratings formed with several tens of kJ/cm<SUP>2</SUP> fluence yielded surface-relief gratings of several tens of nm amplitude and bulk refractive-index changes of nearly 10<SUP>-3</SUP> in both OH- and Cl-content glasses that were pre-soaked in high-pressure hydrogen. H<SUB>2</SUB>-loading offered an approximate 2-fold increase in 157-nm glass photosensitivity, and also increased the 157-nm material absorption by several factors during the exposure. In contrast, F-doped glass did not offer a measurable 157-nm photosensitivity, and the 157-nm absorption showed a surprising order-of-magnitude drop following an approximate 10-kJ/cm<SUP>2</SUP> laser dose.
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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 | 0.001 | 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 it