Frequency transfer of optical standards through a fiber network using 1550-nm mode-locked sources
Bibliographic record
Abstract
High-stability transfer of harmonics of the pulse repetition frequency of a mode-locked fiber laser through a fiber network is demonstrated. The passive transfer instability is < 3 /spl times/ 10/sup -14/ for a 1-s averaging time, comparable with the optical-carrier frequency transfer of a narrow-linewidth CW laser. With active cancellation of the fiber-transmission noise, the transfer instability of this radiofrequency signal is below 7 /spl times/ 11/sup -15/ /spl tau//sup -1/2/ for an averaging time /spl tau/ /spl ges/ 1 s, limited by the noise floor of the frequency-counting system. The noise cancellation reduces the rms timing jitter, integrated over a bandwidth from 1 Hz to 100 kHz, to a record low of 70 (20) fs for a 6.9 (4.5) km-round-trip installed (laboratory-based) fiber network.
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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 | 0.000 |
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".