We have demonstrated a record sensitivity of -37.0 dBm (38 photons/bit) for a BER of 10 -9 at 42.7-Gb/s using an integrated balanced optical front end. Results were obtained using optical preamplification of RZ-DPSK modulation and an external delay-interferometer. The OSNR requirement was measured to be 16.9 dB in a 0.1-nm bandwidth. The impact of polarization-mode dispersion (PMD) and chromatic dispersion on the optical front end performance has been measured. Performance for enhanced forward error correction has been projected based on 10 -3 BER performance.
© 2004 IEEE
Jeffrey H. Sinsky, Andrew Adamiecki, Alan Gnauck, Charles A. Burrus, Juerg Leuthold, Oliver Wohlgemuth, S. Chandrasekhar, and Andreas Umbach, "RZ-DPSK Transmission Using a 42.7-Gb/s Integrated Balanced Optical Front End With Record Sensitivity," J. Lightwave Technol. 22, 180- (2004)