Title :
RZ versus NRZ modulation format for dispersion compensated SMF-based 10-Gb/s transmission with more than 100-km amplifier spacing
Author :
Caspar, C. ; Foisel, H.-M. ; Gladisch, A. ; Hanik, N. ; Küppers, F. ; Ludwig, R. ; Mattheus, A. ; Pieper, W. ; Strebel, B. ; Weber, H.G.
Author_Institution :
Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany
fDate :
4/1/1999 12:00:00 AM
Abstract :
We compared numerically and experimentally the transmission behavior of return-to-zero (RZ) and nonreturn-to-zero (NRZ) modulated signals, 10 Gb/s were transmitted over 2040-km standard single-mode fiber using an alternating dispersion compensation scheme in a recirculating loop with 102 km amplifier spacing. Receiver sensitivities of -33 dBm (NRZ) and -35 dBm (RZ) could be achieved. RZ allows for a simple linear dispersion compensation whereas NRZ suffers from nonlinear signal distortion. NRZ requires under-compensation of the linear chromatic dispersion dependent on signal power and transmission length. Therefore, NRZ makes network design more difficult.
Keywords :
compensation; optical fibre communication; optical fibre dispersion; optical modulation; optical receivers; sensitivity; 10 Gbit/s; 102 km; 20 to 40 km; NRZ modulation format; RZ modulation format; alternating dispersion compensation scheme; dispersion compensated SMF-based Gb/s transmission; km amplifier spacing; linear chromatic dispersion; linear dispersion compensation; network design; nonlinear signal distortion; nonreturn-to-zero modulated signals; receiver sensitivities; recirculating loop; return-to-zero modulated signals; standard single-mode fiber; transmission behavi; transmission length; under-compensation; Chromatic dispersion; Fiber nonlinear optics; Optical amplifiers; Optical distortion; Optical fiber amplifiers; Optical fiber communication; Optical modulation; Optical receivers; Optical signal processing; Pulse modulation;
Journal_Title :
Photonics Technology Letters, IEEE
