Photonic Aggregation of Microwave Signals With Electro-Optic Modulation and Polarization Combination
Bibliographic record
Abstract
A novel approach to the implementation of photonic aggregation of microwave signals using a single dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM) and a polarizer is proposed and experimentally demonstrated. Four binary phase shift keying (BPSK) microwave signals with an identical carrier frequency are aggregated into a single 16 quadrature amplitude modulation (16QAM) optical signal through phase and amplitude control at the DP-DDMZM and the polarizer. The aggregated optical signal is then transmitted over an optical fiber to an optical coherent receiver, where the BPSK signals are recovered by demodulating the aggregated optical signal. The approach is evaluated experimentally. Four BPSK microwave signals with an identical carrier frequency of 15 GHz and each having a symbol rate of 1 GBaud are aggregated to be a 16QAM optical signal. The constellation diagrams are measured to confirm the effectiveness of the aggregation process. To further increase the transmission capacity without using additional spectral resources, the employment of polarization division multiplexing (PDM) is studied, and the doubling in transmission capacity is confirmed.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
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 | 0.002 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".