Study of optical pulses - Fiber gratings interaction by means of joint time-frequency signal representations
Bibliographic record
Abstract
In this paper, we carry out a systematic study on the interaction between ultrashort optical pulses and fiber Bragg grating structures operating in the linear regime. Our study is based on the joint time-frequency representation (spectrogram) of the reflection impulse response from the grating structures under analysis. By means of such a representation we get to visualize in a single image all the relevant information concerning the optical and dispersive behavior of the grating structures and more importantly, we obtain information on the pulse-grating interaction process, which otherwise is not accessible from any other method. Here, we analyze uniform and nonuniform fiber Bragg gratings. The effects of the apodization of the coupling coefficient and chirp of the grating period on the macroscopic optical properties of the considered gratings are investigated. Furthermore, we extend our analysis to more complicated in-fiber grating structures such as concatenated gratings, Fabry-Perot-like grating structures, and superimposed gratings. The results of our study indicate that the time-frequency methods constitute a powerful tool for the analysis and design of fiber Bragg grating structures.
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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 | 0.001 | 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".