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MMI coupler-type optical DFT filter for demultiplexing 25 Gsymbol/s sub-carrier-based optical OFDM signal

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Abstract

An integrated-optic DFT filter, which mainly consists of a 4 × 4 MMI coupler and can demultiplex a 4 × 25 Gsymbol/s OFDM signal, is reported. The transmittance of the fabricated DFT filter is demonstrated.

© 2019 The Author(s)

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