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- W310053743 abstract "Abstract : We developed fabrication technology, advanced materials and design techniques to realize resonance enhanced modulators with ring-resonators. The devices are based on a lateral geometry with deeply etched waveguides in InP. ICP etching techniques and masks were developed to obtain sub-micrometer deep etched waveguides with nanometer residual sidewall roughness for low optical loss and high quality resonators. Ultra compact multi-mode interference (MMI) couplers are designed and fabricated for coupling of the ring-resonators with superior reproducibility and low excess loss. Design and test procedures were established for ring-resonators and resonance enhanced modulators. We developed three-step quantum wells in GalnAsP/InP for enhanced electro-optic coefficients. Measured electro-optic coefficient of the three-step quantum wells is nearly three times higher than the conventional rectangular quantum well at 1.55 micrometers. The enhanced electro-optic effect, combined with a low optical absorption coefficient alpha<1 /cm increases a modulator figure of merit by nearly 36 times, and decreases the power consumption by nearly one order of magnitude compared with a conventional quantum well design. MMI-coupled electro-refractive ring resonators have been fabricated using deeply etched InGaAsP/InP waveguides. We demonstrated the first electro-refractive ring-resonator modulators. RF-modulation with the ring resonator is demonstrated. Resonance enhanced modulation efficiency with the ring-resonance was confirmed." @default.
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- W310053743 date "2004-05-01" @default.
- W310053743 modified "2023-09-27" @default.
- W310053743 title "Resonant Enhanced Modulators" @default.
- W310053743 hasPublicationYear "2004" @default.
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