Phase-coded microwave waveform generation based on a tunable optoelectronic oscillator
Bibliographic record
Abstract
Photonic generation of an arbitrary phase-coded microwave waveform with a tunable microwave carrier frequency using a frequency-tunable optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. The tunable OEO has two functions: to generate a frequency-tunable microwave signal and to output one optical sideband. The optical sideband is injected into a polarization modulator (PolM) jointly with part of the light wave from the OEO laser source, with their polarization directions alighted, respectively, with the principal axes of the PolM. An electrical phase coding signal is applied to the PolM, to generate two complementarily phase-coded light waves which are converted to an electrical signal by the two signals at a highspeed photodetector (PD). The key significance of the technique is that a phase-coded signal with a tunable microwave carrier frequency and a reconfigurable coding pattern can be generated without using a separate microwave source. The technique is experimentally verified. The generation of a binary and quadratic phase-coded microwave waveform with a microwave carrier frequency at 10 and 15 GHz is demonstrated.
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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 | 0.000 |
| 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 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".