Title :
Comparison of different DQPSK transmitters with NRZ and RZ impulse shaping
Author :
Ohm, M. ; Freckmann, Torsten
Author_Institution :
Inst. of Telecommun., Stuttgart Univ., Germany
Abstract :
We compare three different differential quadrature phase-shift keying (DQPSK) transmitters: One with parallel Mach-Zehnder modulators (MZM), one with a MZM and a phase modulator (PM) in series and a new one with a single PM. Although they all generate optical DQPSK signals, it turns out that their performance differs with respect to bit error probabilities, chromatic dispersion and nonlinearity tolerance for nonrectangular impulse shaping.
Keywords :
differential phase shift keying; error statistics; optical dispersion; optical transmitters; phase modulation; quadrature phase shift keying; DQPSK transmitters; NRZ impulse shaping; bit error probabilities; chromatic dispersion; different differential quadrature phase-shift keying transmitters; nonrectangular impulse shaping; parallel Mach-Zehnder modulators; phase modulator; Chromatic dispersion; Error probability; Optical coupling; Optical filters; Optical modulation; Optical receivers; Optical signal processing; Optical transmitters; Phase modulation; Phase shift keying;
Conference_Titel :
Advanced Modulation Formats, 2004 IEEE/LEOS Workshop on
Print_ISBN :
0-7803-8425-3
DOI :
10.1109/ADMF.2004.1321694
