Stability properties of dispersive extended-cavity semiconductor lasers
Bibliographic record
Abstract
Summary form only given. Since semiconductor diode dispersive extended-cavity lasers are currently of interest for a variety of applications, understanding their stability properties is important to ensure stable CW laser operation. These lasers consist of a semiconductor diode coupled to some sort of external dispersive reflector (e.g. a fiber grating) that forms one mirror of the laser cavity. Quite unexpectedly, experiments have shown that for chirped fiber grating lasers (FGL), the orientation of the grating drastically alters the stability of CW operation: when the grating was placed such that the index modulation period decreased with distance from the coupled diode facet, stable single mode operation occurred, but the opposite grating orientation resulted in significant mode-hopping. This result is counter-intuitive, since the grating reflectivity spectra are identical in both cases; the only difference is in the sign of the curvature of the reflection spectrum phases, and this has been shown to play only a small role in large-scale current modulation dynamics. In this presentation, we not only explain these curious experimental results, but we also find a simple numerical prescription with which the stability of any such system can be assessed, provided the reflection spectrum of the external reflector is known.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".