Design of deeply etched antireflective waveguide terminators
Why this work is in the frame
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Bibliographic record
Abstract
An alternative solution to achieve an antireflective waveguide terminator is proposed by adopting a deeply etched waveguide structure to replace the conventional facet interference coatings. The performance is evaluated by different numerical approaches and optimum designs can be achieved based on the combination of the finite-difference time-domain method and the transfer matrix method. Perfectly matched layer absorbing boundary conditions are employed and pre-optimized in order to eliminate any nonphysical reflections due to the computation window introduced artificially. Results show that a power reflectivity of less than 5.0×10/sup -3/ over almost the entire C-band with a minimum value as low as 1×10/sup -5/ can be achieved. The effects on etching with a tilted angle and etching with finite depth are also studied.
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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 | 0.001 | 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 it