Composite transmission over large-core polymer optical fibers for in-home networkings

To deliver multiple services over a single optical infrastructure, a novel composite transmission approach is proposed for an in-home access network combining multi-band (MB) discrete-Fourier-transform spread (DFT-S) discrete multitone (DMT) and M-ary position phase shift keying modulation (MPPSK). Bit-loading algorithm is introduced to maximize the total bit rate and permits a spectral coexistence between the two schemes. In addition, the optimal used bandwidth and multiband number are investigated in order to maintain strong robustness against fiber nonlinearity while achieving reduced peak-to-average power ratio (PAPR). A composite DMT and two MPPSK channels over 50 m step-index (SI) polymer optical fiber (POF) link has been successfully implemented. The results demonstrate that a total bit rate of 1.122 Gbps with a bit error rate (BER) of 1.2019×10^-4 and 2.01×10^-3 for DMT and MPPSK are achieved respectively, and what´s more, excellent coexistence performance is obtained in the composite transmission. It is a promising technique for future in-home networkings.