Simultaneously Self-Inscribed Antisymmetric Long-Period Grating and Antisymmetric Apodized Fiber Bragg Grating in a Dual-Core As$_{2}$Se$_{3}$-PMMA Tapered Fiber
Bibliographic record
Abstract
We report for the first time that transmission of optical light centered at a wavelength of 1549.8 nm through a tapered dual-core As <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Se <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> -PMMA fiber simultaneously inscribes an antisymmetric long-period grating and an antisymmetric apodized fiber Bragg grating. The evolutions of the transmission spectrum, and the back-reflected spectrum of the dual-core fiber are experimentally measured as the accumulated exposure time increases. The bandwidth of the antisymmetric apodized fiber Bragg grating is measured, and a narrow bandwidth of 3.5 GHz (0.028 nm) with ~100% reflectivity (~32 dB contrast) is observed. A theoretical model of an antisymmetric apodized fiber Bragg grating in a dual-core fiber computationally reproduces the experimentally observed evolution of the transmission spectrum and the back-reflected spectrum. Both theory, and experiment reveal for the first time that such structure requires dual phase-matching conditions. It is also the first time that one single reflection peak of a fiber Bragg grating is observed on a dual-core multimode fiber that supports two modes due to the satisfying of dual-phase matching conditions. The performance of this device as an optical filter is investigated. The antisymmetric apodized structure provides a novel method for achieving apodized fiber Bragg gratings with narrow bandwidth, high reflectivity, and suppression of side-lobes. The simultaneously inscribed antisymmetric long-period grating and antisymmetric apodized fiber Bragg grating in the dual-core As <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Se <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> -PMMA taper opens the path towards the realization of novel sensors and devices.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.003 | 0.005 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| 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".