High dynamic range and wavelength-reused bidirectional radio-over-fiber link
Why this work is in the frame
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Bibliographic record
Abstract
We propose and experimentally demonstrate a bidirectional radio-over-fiber (RoF) link based on a Sagnac loop incorporating a polarization modulator (PolM) to generate simultaneously a polarization-modulated optical signal and an unmodulated optical signal for wavelength reuse and for increasing the dynamic range. Thanks to the traveling-wave nature of the PolM, a polarization-modulated optical signal and an unmodulated optical signal are generated at the output of the Sagnac loop, which are combined at a polarizer and detected at a photodetector. By controlling the powers of the two optical signals, the third-order intermodulation distortion terms can be fully suppressed to increase the dynamic range for downstream transmission. The unmodulated optical signal is reused for upstream transmission. A bidirectional RoF link to transmit 2.5 Gb/s 16QAM downstream and upstream signals, and a 7.1 Gb/s 128 subcarrier orthogonal frequency division multiplexing 16QAM downstream and upstream signals using a single wavelength over a 10.5 km single-mode fiber are experimentally demonstrated. The transmission performance versus the dynamic range is 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 | 0.000 | 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) | 0.000 | 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