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We propose and experimentally demonstrate a polarization-insensitive 3-dB coupler by using tapered three-guide structure based on the silicon-on insulator. Owing to the symmetrical and tapered structure, the dependency on wavelength and polarization are both alleviated. The coupling length of the 3-dB coupler is about $120~\mu \text{m}$ . The measured wavelength-dependent power imbalance is less...
We demonstrate an on-chip WDM-compatible mode multiplexing system with function of phase demodulation. The proposed scheme can be useful at the interface of long-haul and on-chip communication systems, which prefer phase and intensity modulated formats respectively.
An on-chip polarization insensitive interconnection is proposed and fabricated based on SOI platform. The proposed circuit is experimentally demonstrated in fiber-optic communication system utilizing wavelength, polarization and mode multiplexing techniques with power penalty of 3.2dB.
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