Photochemical writing of silica optical waveguides in silicone rubber by F<sub>2</sub>laser
Why this work is in the frame
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Bibliographic record
Abstract
Photochemical writing of silica (SiO2) optical waveguides in silicone [(SiO(CH3)2)n] rubber has been successfully demonstrated by 157-nm F2 laser-induced photochemical modification of silicone into silica. The 2-mm-thick or ∼40- m-thick silicone rubber was exposed to F2 laser through a thin (∼0.2 mm) air layer. A proximity Cr-on-CaF2 photomask with 8- to 16- m-wide slits controlled the exposure size to define the width of the silica waveguides. A laser processing window to generate crack-free waveguides with good optical transparency was found by varying the number laser pulse, pulse repetition rate and single pulse laser fluence. Otherwise, rapid or excess exposure of the F2 laser caused cracking of the silica waveguides. The waveguides were found to guide both red (635-nm) and infrared (1550- nm) wavelength light with propagation loss estimated to be ∼15 and ∼6 dB/cm, respectively. Most of the loss originates in Rayleigh scattering from numerous inclusions originally present in the commercial 2-mm-thick silicone rubber.
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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 | 0.001 |
| 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 it