High Speed Colourless Transmitter Based On RSOA

We propose and demonstrate a novel colorless optical transmitter based on all-optical wavelength conversion using areflective semiconductor optical amplifier (RSOA) for upstream transmission in wavelength-division multiplexed passive opticalnetworks. All-optical wavelength conversion based on nonlinear gain modulation in RSOAs is demonstrated at a bit rate of 10Gbit/s. It is shown that a bit-error-rate of <10-²⁵ can be achieved and an extinction ratio of >9 dB can be obtained at a bit rate of 10Gbit/s with a 2⁷–1 non-return-to- zero (NRZ) pseudorandom bit sequence (PRBS). In comparison with conventional SOAs, wavelength conversion by RSOAs shows much improved performances in high-speed alloptical wavelength conversions.