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High-bandgap offset 1300nm InAlGaAs quantum well (QW) has been used for electroabsorption modulator. High conduction/valance bandgap offset ratio allows strong exciton effect under high electric field, leading to broadband operation. >10dB extinction ratio from 1280nm to 1320nm and 40GHz of electical-to-optical response has been demonstrated.
Using local quantum-well-intermixing and cascaded-integration technique, a high-transmission broadband EAM-integrated SOA is demonstrated. Above 20dB-enhancement optical transmission, 57nm wavelength shift in electro-luminance, and 40Gb/s performance are observed, enabling regrowth-free local bandgap engineering in integration template.
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