Microwave Photonic Multimode Injection-Locked Frequency Divider With a Wide Operational Range Based on an Optoelectronic Oscillator
Bibliographic record
Abstract
We propose and implement a microwave photonic multimode injection-locked frequency divider (ILFD) with a wide frequency operational range based on an optoelectronic oscillator (OEO). In the OEO, a Mach-Zehnder modulator (MZM) and a photodetector (PD) are employed to construct a frequency multiplier to achieve an <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${N} -1$ </tex-math></inline-formula> times frequency multiplication, which is then mixed with an external injection signal at an electrical mixer in the OEO loop. By adjusting the round-trip gain and time delay of the OEO loop, a radio frequency (RF) signal with a frequency that is 1/N that of the injection signal is generated, thus N times frequency division is achieved. Theoretical analysis and experimental verification are conducted to evaluate the effectiveness of the proposed ILFD. The results demonstrate that the system can divide an RF signal from 2.6 to 20.8 GHz to 1.3–1.95 GHz with different frequency division factors ranging from 2 to 13. A significant improvement in phase noise of 35.11 dB is also obtained at a frequency offset of 100 kHz when the frequency division factor is 13.
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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 | 0.001 |
| 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".