Reliability of InP-based avalanche photodiodes for high bit-rate fiber-optic communication systems
Bibliographic record
Abstract
We report on a study of the impact of mechanical stress on the electrical properties of InP-based avalanche photodiodes used in OC48 and OC192 10 Gb/s fiber-optic communication applications. The device structure under study consists of separate absorption, grading, charge and multiplication regions. A large population of devices, which were die bonded onto carriers using a range of epoxy and eutectic solder adhesives, has been subjected to accelerated life testing for >5000 h under high thermal and electrical overstress conditions. In addition, we have performed an analysis of the response of the current-voltage characteristics of the device to an external mechanical stress. The mechanical stress experiments give insight into variations in device performance that may arise if the die bonding process is not performed properly. Relaxation in device strain, due to thermally induced epoxy bond degradation, is shown to be a potential hazard, which can interfere with reliability assessment of the device. When these factors are controlled, the device lifetime exhibits the expected log-normal distribution, characterized by an exceptionally low wearout FIT rate.
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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 | 0.002 |
| 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".