Generation and distribution of UWB pulse signals by use of optical phase modulation and PM-IM conversions
Bibliographic record
Abstract
In this paper, we present two approaches to generating and distributing FCC-regulated UltraWideBand (UWB) pulse signals in the optical domain, based on optical phase modulation. In the first approach, an electrical Gaussian pulse train is applied to modulate the phase of an optical carrier using an electrooptic phase modulator. A 25-km single-mode fiber link is then used to realize PM-IM conversion which has a frequency response equivalent to a microwave bandpass filter. When the Gaussian pulse train is distributed over the 25-km fiber, the Gaussian pulses are then shaped into doublet pulses at the receiver front-end. Therefore, the UWB pulses are not generated but also distributed over optical fiber. In the second approach, instead of using an electrooptic phase modulator, optical phase modulation is implemented in the optical domain based on cross phase modulation in a nonlinear fiber. The PM-IM conversion is then achieved by use of a fiber Bragg grating that serves as a frequency discriminator. Electrical monocycle and doublet pulses are obtained at the output of the photodetector. Experimental results for both approaches are presented and discussed. The use of the second configuration to implement pulse on-off, polarity and shape modulation in the optical domain is also discussed.
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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 | 0.000 | 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 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".