G. Cincotti, S. Shimizu, N. Wada, H. Uenohara, K. Hattori, M. Okuno, S. Mino, A. Himeno, T. Murakawa, T. Kodama, T. Nagashima, M. Hasegawa, T. Konishi
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OFDM to OTDM conversion by fractional Fourier transform
A pioneering energy-efficient all-optical system to transform an OFDM signal into an OTDM data flow is proposed and experimentally demonstrated for the first time, based on an innovative fully passive AWG device that implements the fractional Fourier transform.