Title :
Comparison of return-to-zero differential phase-shift keying and ON-OFF keying in long-haul dispersion managed transmission
Author :
Xu, Chris ; Liu, Xiang ; Mollenauer, Linn F. ; Wei, Xing
Author_Institution :
Lucent Technol. Bell Labs, Holmdel, NJ, USA
fDate :
4/1/2003 12:00:00 AM
Abstract :
Performance of return-to-zero (RZ) differential phase-shift keying (DPSK) in ultralong-haul dense wavelength-division-multiplexing (WDM) dispersion managed transmission is studied experimentally and compared with conventional ON-OFF keying (OOK) in a 10-Gb/s system. We show that, while OOK out-performs phase-shift keying in a low spectral efficiency WDM system, the performance of DPSK is comparable to OOK at 10-Gb/s transmission with a spectral efficiency of 0.2. Furthermore, RZ DPSK is advantageous in a high spectral efficiency (e.g., >0.4) system and our numerical simulation results show superior performance of DPSK at 10 Gb/s with 25-GHz channel separation.
Keywords :
amplitude shift keying; differential phase shift keying; optical fibre dispersion; optical fibre networks; telecommunication network management; wavelength division multiplexing; 10 Gbit/s; DPSK; ON-OFF keying; OOK; WDM system; channel separation; high spectral efficiency; long-haul dispersion managed transmission; low spectral efficiency; numerical simulation; phase-shift keying; return-to-zero differential phase-shift keying; spectral efficiency; ultralong-haul dense wavelength-division- multiplexing dispersion managed transmission; Arrayed waveguide gratings; Differential phase shift keying; Differential quadrature phase shift keying; Optical fiber dispersion; Optical transmitters; Phase modulation; Phase noise; Phase shift keying; Scanning probe microscopy; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.809317
