Thermal modeling of a GaAs-based Mach-Zehnder modulator integrated with a MMIC broad-band driver amplifier
Bibliographic record
Abstract
This paper presents a thermo-mechanical analysis of an optoelectronic system including a Mach-Zehnder optical modulator integrated with a broad-band GaAs driver amplifier, forming a module which then is placed into a low temperature co-fired ceramic (LTCC) substrate. All module connections such as voltage supply, RF signals and fiber optic input/output are realized through the LTCC. Thermal analysis of this integrated system shows elevated temperatures in the optical component caused by the heat generated in the power amplifier and dissipated into the substrate-carrier and from there into the LTCC. Temperature profiles along the MZ modulator reveal a strong non-uniformity, reaching a 26C temperature difference between the optical component input and output. A stress-strain analysis is also performed. Preliminary results show significant physical distortion of the optical component, which could cause optical misalignments and additional coupling losses. These findings indicate a need for thermal consideration in early design stages.
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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 | 0.000 | 0.000 |
| Research integrity | 0.001 | 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".