Analysis of Simultaneous Photonic Frequency Downconversion and Optical Subcarrier Modulation in an Electroabsorption Modulator
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Bibliographic record
Abstract
We present theoretical analysis of simultaneous photonic frequency downconversion, based on four-wave mixing (FWM), and optical subcarrier modulation in an electroabsorption modulator (EAM) for broadband millimeter wave (mm-wave) over fiber uplinks. A model of FWM generation in an EAM is established. The FWM efficiency with an EAM at dc bias with and without RF modulation is analyzed, including the impact of bias voltage, modulation voltage, and frequency detuning. The calculated FWM efficiency agrees well with the measured. The signal-to-noise ratio (SNR) of photonic frequency downconverted RF signal is also analyzed, considering the nonlinear distortion due to the EAM nonlinearities. Moreover, calculated error vector magnitude using theoretical SNR is compared with the measured for multiband orthogonal frequency division multiplexing ultrawideband mm-wave signals.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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 | 0.000 |
| 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 it