Improved noise tolerance and spectral efficiency in RSOA based WDM-PON by using Miller signal

The performance of Miller encoded upstream signal is analyzed and compared with Manchester coding scheme to design a reflective semiconductor optical amplifier (RSOA) based loopback wavelength division multiplexed PONs with centralized continuous wave seeding source. The results show that both the Miller and Manchester coding schemes have an improved tolerance against rayleigh backscattering noise and thereby work effectively at signal to crosstalk ratio down to 15 dB. In terms of spectral efficiency, Miller coding scheme requires less electrical bandwidth compared to Manchester coding and hence, useful to increase the system capacity with limited bandwidth devices. In particular, error free operation is achieved for 2.5 Gb/s Miller coded data transmission by modulating the RSOA with bandwidth $${<}1.2$$<1.2 GHz.

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