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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 |
| Open science | 0.001 | 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 source (direct Gemma or distilled Codex), 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".