Dynamic-Range Enhancement for a Microwave Photonic Link Based on a Polarization Modulator
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Bibliographic record
Abstract
A microwave photonic link (MPL) with an increased spurious-free dynamic range (SFDR) using a polarization modulator is proposed and experimentally demonstrated. The fundamental concept of the proposed approach to increase the SFDR is to reduce the third-order intermodulation distortion (IMD3) and to improve the modulation efficiency by partial carrier suppression, which is realized here by producing two channels of intensity-modulated signals with one having only the upper sidebands and the other having the optical carrier that is partially suppressed and the upper sidebands using two optical filters. If the optical powers into the two channels are kept identical, the combination of the two signals at a photodetector will fully cancel the IMD3 terms. In addition, the modulation efficiency is optimized due to the partial carrier suppression, which also leads to an increased SFDR. The proposed MPL is theoretically studied and experimentally demonstrated. An SFDR of 123.48 dB·Hz <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2/3</sup> at a noise floor of -166 dBm/Hz is achieved, which is 15 dB higher than that of a regular intensity-modulation and direct-detection MPL.
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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) | 0.000 | 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) | 0.000 | 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