Power-Efficient Silicon Photonic Thermo-Optic Switch Covering OESCLU-Bands Enabled by Mode-Looped Phase Shifters With Subwavelength Gratings
Bibliographic record
Abstract
Ultra-broadband wavelength division multiplexing (WDM) optical networks with densely populated nodes are emerging as a principal direction for enhancing future capacity and advancing network evolution. To address this growing demand, we have developed a colorless, power-efficient thermo-optic Mach-Zehnder switch (MZS) utilizing mode-looped phase shifters. This phase shifter doubles the tuning efficiency by recirculating light through the heated region twice. The phase shifter is optimized to ensure a balanced performance across all optical communication bands, including O-, E-, S-, C-, L-, and U-bands. Furthermore, we have incorporated subwavelength grating structures (SWGs) into the adiabatic 3-dB couplers and dual-mode (de)multiplexers, which are critical for enhancing the ultra-broadband capabilities of the MZS. Experimental results demonstrate that our device achieves a switching power of 11.15 mW, with extinction ratios (ERs) surpassing 8.44 dB over a 405-nm wavelength range, and exceeding 10 dB from 1295 nm to 1675 nm. These capabilities establish our switch as a key component for future multi-band and power-efficient reconfigurable add-drop optical networks (ROADMs), with the potential to advance the telecommunications industry by supporting expanded bandwidths and enhanced efficiency.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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".