Experimental Study of Burst-Mode Reception in a 1300 km Deployed Fiber Link
Why this work is in the frame
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Bibliographic record
Abstract
We experimentally demonstrate burst-mode reception in a 1300 km fiber link that spans from Montreal to Quebec City and back, with a 1.25 Gb/s burst-mode receiver (BMRx). The receiver features automatic phase acquisition using a clock phase aligner (CPA) and provides instantaneous (0 preamble bit) phase acquisition with error-free operation [packet-loss ratio (PLR) <10−6 and bit error rate (BER) <10−10] for any phase step (±2π rad) between consecutive packets, while also supporting more than 1100 consecutive identical digits (CIDs). The CPA makes use of a phase picking algorithm and an oversampling semi-blind clock and data recovery circuit operated at 2× the bit rate. We also study the effect of channel impairments on the performance of BMRx at such distances. More specifically, we investigate the PLR performance of the system and quantify it as a function of the phase step between consecutive packets, received signal power, CID immunity, and BER, while assessing the trade-offs in preamble length, power penalty, and pattern correlator error resistance.
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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 | 0.000 |
| 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