Measuring the deterministic character of laser damage of dielectrics in ultrashort pulsed regime
Bibliographic record
Abstract
In this work, the authors propose a direct and quantitative measurement of the deterministic character of femtosecond laser-induced damage in fused silica. For pulses ranging from 7 fs to 450 fs, and with combined experimental procedures enabling to measure both the laser-induced damage and ablation thresholds, the paper presents an experimental measurement of the determinism strength for material damaging, corresponding to the transition slope of the damage probability curve as a function of laser fluence. All the experiments have been done on fused silica (Suprasil) and with a similar damage setup and diagnostics, and beam parameters (single-shot regime, beam waist ~5-10 mum, linear polarization) to ensure a reliable comparison. The results indicate that the laser damage occurrence is more deterministic below 30 fs, associated with a better "photon efficiency" for material removal . These investigations also provide a physical insight and control over important laser processes parameters like damage/ablation threshold fluence, crater shape, and extension of heat-affected zone.
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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 | 0.000 | 0.001 |
| 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) | 0.001 | 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".