A Novel 10 Gb/s Duobainry Received with Improved Back-to-Back Performance and Large Chromatic Dispersion Tolerance

We demonstrate a receiver, which improves the back-to-back (b-t-b) performance of optical duobinary signals at 10 Gb/s. The required optical signal to noise ratio (OSNR) for a bit error rate (BER) of 1x10-3 was found to be as low as 10.8 dB in b-t-b operation. We tested the receiver with two commercially available 10 Gb/s duobinary transmitter samples. Excellent chromatic disperion (CD) tolerance was maintained with the novel receiver design.