System impairment of birefringence in fiber Bragg gratings in optical networks
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Bibliographic record
Abstract
Considering the presence of birefringence in fiber Bragg gratings (FBGs), the spectral polarization mode dispersion and polarization-dependent-loss-induced power penalty of eye opening is simulated for a network consisting of cascaded FBGs with various index apodization profiles. It is shown that with the same FBG length, 3dB bandwidth, and the birefringence value, FBGs with Gaussian index apodization profiles introduce the highest power penalty compared to FBGs with other apodization profiles, such as raised cosine, Blackman, etc. When there is wavelength misalignment up to 0.1nm between the central FBG's resonance and the wavelength of the laser source, the birefringence-induced power penalty can be up to a few times higher than the case with no wavelength misalignment.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 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 it