Microwave Photonic Link With Improved Dynamic Range Using a Polarization Modulator
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Bibliographic record
Abstract
A microwave photonic link (MPL) using a single polarization modulator (PolM) with an improved spurious free dynamic range (SFDR) is proposed and experimentally demonstrated. The proposed MPL is designed based on the destructive combination of the distortion signals in the electrical domain, which is realized using a PolM with its output split into two channels. In the upper channel, the PolM, a polarization controller (PC), and a polarization beam splitter (PBS) form an equivalent Mach-Zehnder modulator (MZM) that is biased at the quadrature point. The optical carrier is suppressed using a phase-shifted fiber Bragg grating (PS-FBG). In the lower channel, the PolM, another PC, and the PBS form a second equivalent MZM that is also biased at the quadrature point but at the opposite slope of the transfer function. The signals from the two channels are sent to a photodetector (PD). If the optical powers into the two channels are identical, the third-order intermodulation terms are completely suppressed. An experiment is performed. An enhancement in SFDR of 10 dB is achieved. The insertion loss of the proposed MPL is also estimated, which is 9.5 dB smaller than a phase modulator based 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 | 0.000 | 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 | 0.001 | 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 it