D. Penninckx et al., EXPERIMENTAL-VERIFICATION OF THE PHASE-SHAPED BINARY TRANSMISSION (PSBT) EFFECT, IEEE photonics technology letters, 10(4), 1998, pp. 612-614
Using an external phase modulator, a phase signal has been superimpose
d to a 10-Gb/s chirp-free nonreturn-to-zero (NRZ) signal in order to e
xtend the dispersion limit. A transmission over 146 km of standard dis
persive fiber has been achieved. The phase signal shape is based on a
three-bit analysis using the concepts of phase-shaped binary transmiss
ions (PSBT). By removing or adding the phase signal, we have experimen
tally shown the physical concepts involved in PSBT in agreement with o
ur simulations.