Improved diamond‐like carbon coating deposition uniformity on cylindrical sample by its suspension in RF PECVD chamber
Bibliographic record
Abstract
The paper discusses the uniformity of diamond‐like carbon (DLC) thin overlays deposited with radio frequency plasma‐enhanced chemical vapor deposition (RF PECVD) method on optical fibers with induced long‐period gratings (LPGs). When refractive index around the LPG increases, a spectral response of the LPG strongly depends on properties of the overlay. Using LPG suspended in the RF PECVD chamber, we have found that DLC thickness distribution around the fiber highly depend on a distance between the LPG and the electrode. More asymmetrical deposition, which takes place when the LPG is located closer to the electrode, induces appearance of a series of additional resonances in LPG transmission spectrum. It has been found that for the fiber suspended 7.2 mm over the electrode the coating has the highest uniformity. Higher uniformity obtained by fiber suspension in the chamber has been compared with the effect resulting from fiber rotation between two consecutive processes. It is shown that more symmetrical deposition is obtained for the suspended samples than for the rotated ones.
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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 | 0.000 |
| 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) | 0.001 | 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".