Measurement and simulation of wavefront deformation induced by a high-power CW laser in thin-film optical filters
Bibliographic record
Abstract
High-power continuous-wave lasers are widely employed in industrial, defense, and research applications. Yet their interaction with optical thin-film components introduces challenges due to photo-induced thermal effects. This study investigates wavefront deformations arising from thermal gradients in thin-film optical filters under 1 µm high-power laser illumination. We implement an experimental platform that combines a high-resolution wavefront sensor in an imaging configuration with an infrared camera. The setup enables simultaneous mapping of optical path difference (OPD) and surface temperature on the same component during irradiation. Reflected and transmitted wavefront deformations are quantified, and a finite-element model reproduces the coupled thermo-elastic and thermo-optic response. The phase metrology coupled to a frequency filtering method demonstrates a sensitivity better than 2 nm in OPD for a 1 K temperature rise. Finite-element predictions agree with experiment over a 25 mm clear aperture, validating the methodology. By bridging synchronous measurements and modeling, the approach delivers a practical workflow for qualifying and optimizing thin-film components in high-power laser systems.
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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".