Bibliographic record
Abstract
Semiconductor diode lasers can provide compact sources of ultrashort light pulses [1-2]. Our research efforts are aimed at the development of a widely tunable, diode laser source for the generation of picosecond, and ultimately sub-picosecond, pulses. The InGaAsP/InGaAs active region of the diode is composed of two quantum wells [3-4] grown lattice matched to GaAs. Work is done using both symmetric and asymmetric structures. All laser structures are grown using the McMaster molecular beam epitaxy facility. Mode-locking is achieved with the diodes in an external cavity configuration. The two different quantum wells allow a 64 nm tuning range centered at 985 nm. Typical pulse durations measured directly from the diode are found to be between 3 and 15 ps. The mode-locked output from the external cavity laser is then coupled into a semiconductor optical amplifier to increase the pulse power. The active regions of the amplifiers are based on the same InGaAsP/InGaAs material as for the oscillators. Our initial amplification work focuses on narrow stripe geometries. This provides large bandwidth, single pass traveling wave amplification. The effect of amplification on pulse shape is measured using a cross-correlation technique. In this technique, the ps pulses are frequency mixed through a nonlinear crystal with 80 fs, 795 nm pulses from a mode-locked Ti: Sapphire laser.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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".