We experimentally demonstrate the interference mitigation in direct-detection of optical SSB signals with Nyquist-PAM-4. At 25 Gb/s, we achieve over 300-km and 500-km SSMF with an average BER of 2.7×10-3 (<HD-FEC) and 9.4×10-3 (<SD-FEC), respectively.
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Funding: National High Technology Research and Development Program of China
(863 Program) (2015AA015501), NSFC (No. 61405024, No. 61420106011 and No.61471088) and project of education department of Sichuan Province (15ZB0063)