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Opt Express. 2008 Mar 31;16(7):4872-80.

Silicon photonic circuit with polarization diversity.

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  • 1NTT Microsystem Integration Laboratories, 3-1, Morinosato-Wakamiya, Atsugi-Shi, Kanagawa, Japan. hfukuda@aecl.ntt.co.jp


We devised a silicon photonic circuit with polarization diversity that consists of polarization splitters and polarization rotators. The splitter is based on a simple directional coupler and the rotator has an off-axis double-core structure. Both devices can be made by using planar fabrication technology and require no complex proceses for the fabrication of three-dimensional structures. We fabricated a polarization-independent wavelength filter based on Si wire waveguides as an application of the polarization diversity. The filter consists of the polarization splitters, the rotators, and a ring resonator. The polarization-dependent loss of the filter is about 1 dB. A 10-Gbps data transmission with scrambled polarization is demonstrated.

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