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A polarization insensitive strip-slot waveguide mode converter with large fabrication tolerance is proposed based on symmetric multimode interference (MMI). This converter can achieve efficient strip-slot waveguide coupling (TE:94.9%, TM:94.6%) while the dimensions are only 1.18μm×3μm.
A novel athermal scheme based on resonance splitting of dual-ring structure is proposed and proved. An athermal resonator based on this scheme is demonstrated, achieving athermal transmission over a temperature range of at least 40K.
A high-efficiency vertical binary blazed grating coupler is proposed. An 83% of efficiency and 65nm 3dB bandwidth are demonstrated. The tolerance of incident angle is 11.5°.
A novel polarization splitting is proposed through plasmonic-dielectric coupling with ultrashort coupling length. Extinction ratios of 20.8 dB and 17.0 dB for TE and TM polarizations are achieved at a coupling length of 4.13 µm.
A fabrication friendly crossing-coupled microring resonator was utilized to construct a compact and robust optical sensor which demonstrated a high sensitivity of 225nm/RIU experimentally.
The crossing coupler is introduced to form a microring resonator. The coupling coefficient of the crossing can affect the resonance spectrum significantly based on the model of the coupled mode theory.
The coupled microring resonators interference is discussed and applied to intensity sensing. Relaxed from the requirement of high quality factor, better performance of the coupled MR intensity sensor compared with conventional MR sensor is demonstrated by the transfer matrix theory.
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