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 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".