Electrically Programmable On-Chip Equivalent-Phase-Shifted Waveguide Bragg Grating on Silicon
Bibliographic record
Abstract
We report an electrically programmable equivalent-phase-shifted (EPS) waveguide Bragg grating implemented on silicon with programmable spectral response. Equivalent phase shift through nonuniform sampling in a Bragg grating is an effective solution to realize a phase-shifted Bragg grating, which significantly reduces the requirement for fabrication accuracy by three orders of magnitude as compared with the fabrication of a conventional phase-shifted Bragg grating. In this paper, an EPS Bragg grating with an equivalent phase shift introduced by increasing one sampling period in the grating center by a half sampling period is proposed, and the tuning of the phase shift is enabled by incorporating two independent PN junctions in each sampling period. Through controlling the bias voltages applied to the PN junctions, the spectral response of the EPS Bragg grating is tuned. The proposed EPS waveguide grating is fabricated and its performance is experimentally evaluated. A multichannel EPS Bragg grating with programmable spectral response is demonstrated. The key advantages of implementing EPS Bragg gratings include largely reduced fabrication constraint and strong multichannel tuning capability, which opens new avenues for on-chip Bragg gratings for programmable multichannel signal processing.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".