Ultrashort pulse amplifier using a novel 40/250 polarization-maintaining Yb-doped multiclad fiber
Bibliographic record
Abstract
A polarization-maintaining ytterbium-doped fiber was fabricated from an aluminophosphosilicate glass preform, with core and cladding diameters of 40μm and 250μm, respectively. Suppression of higher-order modes is made possible due to the confined ytterbium doping and the multi-clad design with depressed index inner layer. The fiber is used in a chirped-pulse amplification system delivering as much as 40W average output power at 1030nm. The power amplifier yields a signal gain exceeding 40dB while the ASE was measured to be lower than 1%. Despite some spectral narrowing taking place in the amplifier, the pulse width was measured <450fs after pulse compression was performed. Meanwhile the fiber amplifier is seen to show near diffraction-limited output with a beam quality factor M<sup>2</sup><1.3.
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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) | 0.001 | 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 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".