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Opt Express. 2011 Jul 4;19(14):13531-9. doi: 10.1364/OE.19.013531.

Si micro-ring MUX/DeMUX WDM filters.

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Electronics and Telecommunications Research Institute, Yusong-gu, Daejeon, Korea.


We demonstrate 3rd order micro-ring filters, 100 GHz-spaced 16 channels and 50 GHz-spaced 32 channels. Fabrication-induced resonant wavelength errors, σ = 0.237 nm, and temperature-dependent wavelength shift, 0.043 nm/°C tolerable to ΔT>10 °C, has been measured on filters based on the fundamental TM mode. The problem of CMOS-compatible photolithography is solved, while maintaining a small radius, R = 9 μm. As some dummy channels are arranged, it is shown that an on-chip optical network for many cores CPU can be constructed by 16 channel ring filters with the currently available technology.

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