Trench-assisted multimode fiber used in Brillouin optical time domain sensors
Bibliographic record
Abstract
The trench-assisted multimode fiber TA-OM4 is used as a sensing fiber to achieve a higher signal-to-noise (SNR) in Brillouin optical time domain sensors, due to its high stimulated Brillouin threshold and high modulation instability threshold. The Brillouin gain spectrum (BGS), stimulated Brillouin scattering (SBS) and modulation instability (MI) thresholds of TA-OM4 at 1550 nm are characterized and demonstrated theoretically and experimentally. The SNR improvements of TA-OM4 over G655 and G657 at the end of 15.5 km-long fibers, which are respectively 1.1 dB and 2.3 dB are verified experimentally. We achieve a temperature uncertainty of 0.3°C in 15.5 km TA-OM4 with 5 m spatial resolution by use of a Brillouin optical time domain reflectometry (BOTDR) sensor. The good bend resistance and high SBS and MI thresholds of TA-OM4 with better SNR improvements over SMFs works at the extreme bending conditions.
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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) | 0.000 | 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 | 0.002 |
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".