An optically tunable frequency-doubling optoelectronic oscillator incorporating a phase-shifted-fiber-Bragg-grating-based frequency-tunable photonic microwave filter
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Bibliographic record
Abstract
A novel optically tunable frequency-doubling optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. A photonic microwave filter implemented using a phase modulator and a phase-shifted fiber Bragg grating (PS-FBG) is incorporated in the optoelectronic oscillator loop to ensure frequency-tunable single-frequency oscillation. A fixed optical filter is used at the output of the OEO loop to select one of the 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> -order sideband and the optical carrier. By beating the two wavelengths at a photodetector, a frequency-doubled microwave signal is generated. The microwave frequency can be continuously tunable by changing the wavelength of the optical carrier. An experiment is performed. The generation of a frequency-doubled microwave signal with a frequency tunable from 18 to 28 GHz is demonstrated. The phase noise performance of the generated microwave signal is also investigated.
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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 | 0.001 | 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
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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