Monolithic integrated optoelectronic transmitter on GaAs with fully RIE GRINSCH laser diode
Bibliographic record
Abstract
A fully functioning optoelectronic integrated circuit, a transmitter comprising an AlGaAs GRINSCH (graded-index separate confinement heterostructure) laser diode (LD), a back facet monitor diode, and a driving circuit made up of four MESFETs, has been successfully fabricated. The flexibility that can be attained with facets completely fabricated by reactive ion etching (RIE) is demonstrated on mutually perpendicular stripe lasers side-by-side on the same wafer. The circuits were made on semi-insulating GaAs wafers using two separate MBE (molecular-beam epitaxy) growth runs for the MESFETs and the laser diodes, respectively. More than 50% of the integrated circuits on the 3" wafer were fully functional, although some variation of the FET threshold voltage, transconductance, and the gain-guided LD threshold current was observed. Typical values were -1.5 V, 98 mS/mm, and 100 mA, respectively. Measured speeds of operation exceeded 1 Gb/s.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.003 |
| 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; both teacher heads agree on what is shown here.
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".