Bandwidth Broadening from Vertical Strain Coupling Effect in Chirped Stacked InAs/InGaAsP Quantum Dash Lasers
Bibliographic record
Abstract
In chirped structures with multiple layers of different size quantum dash stacks, different stacking sequences change the gain bandwidth of the active region due to the presence of non-uniformly distributed vertical strain coupling effects. In this paper, two chirped structure single-section Fabry-Perot lasers consisting of five layers of Qdash of different heights (from 1.2 nm to 2.4 nm) stacked in ascending and descending sequences, respectively, were designed. The bright exciton energies of target Qdash in each active region layer were analyzed by an 8-band k-p model with considering strain and piezoelectric effect. In addition, the time-domain traveling wave method was used to analyze the characteristics of the output bandwidth of the chirped structured Qdash Fabry-Perot mode lock laser. For better comparison, single-layer unstacked Qdash of different heights were also calculated for use as a baseline. For the detailed model and parameters, the setting sees our previous works [1], [2]
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".