Single-mode Optoelectronic Oscillator Based on ASE Source and Cascaded Zero-dispersion Recirculating Loops
Bibliographic record
Abstract
A single-mode optoelectronic oscillator with low phase noise and high sidemode suppression ratio (SMSR) is demonstrated by using an amplified spontaneous emission (ASE) source in combination with three cascaded zero-dispersion recirculating loops (ZD-RL). The longest ZD-RL enhances the Q-factor of the microwave photonic (MWP) filter by a factor of 4100 while the two shorter ZD-RLs enlarge the free spectrum range (FSR) of the MWP filter, enabling stable single-mode oscillation. As a result, we experimentally generate a high-purity microwave signal, achieving an SMSR of 72.7 dB. The phase noise of the 10 GHz carrier is measured to be –122 dBc/Hz at a 10 kHz offset-comparable to the performance of a commercial signal generator. The frequency drift is 0.72 kHz within 5 minutes at 6.5 GHz. The whole system is simple, robust, and cost-effective compared to single-wavelength-laser-based OEOs, thereby holds significant promise for applications in high-precision microwave photonic radar and next-generation wireless communication systems.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| 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 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".