title: Suppression of SRS induced crosstalk in RF-video overlay TWDM-PON system using dicode coding.
abstract: In this paper, we investigate the nonlinear Raman crosstalk in RF-video overlay time and wavelength division multiplexed passive optical network (TWDM-PON), and propose a novel spectrum-reshaping method based on dicode coding to mitigate this crosstalk. The dicode coding features ultra-low power spectral density in the low frequency region, which can reduce the nonlinear Raman crosstalk on the RF-video signal effectively. Experimental results show that, compared with traditional non-return-to-zero on-off keying (NRZ-OOK) signals, the crosstalk on RF-video signal can be reduced by 10 ~14 dB when the launch power per TWDM-PON channel varies from 10-dBm to 15-dBm. The transmission of 10-Gb/s dicode signal over 20-km standard single mode fiber (SSMF) is also demonstrated with the receiver sensitivity of -31 dBm at bit error ratio (BER) of 3.8e-3.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Meihua
authors.initials: M
authors.lastname: Bi
authors.forename: Hao
authors.initials: H
authors.lastname: He
authors.forename: Weisheng
authors.initials: W
authors.lastname: Hu