Abstract

Polarization division multiplex (PolDM) doubles the data rate in existing trunk lines without need for additional optical bandwidth. In the presence of dispersion compensation, polarization mode dispersion (PMD) limits the achievable transmission length. PMD tolerance of standard binary intensity modulation or non-return-to-zero coding has already been published. Recently, the return-to-zero (RZ) transmission format has become of more interest; therefore we assess the PMD tolerance of PolDM by numerical simulations and a transmission experiment. For a given total data rate per wavelength PolDM supports at least as much differential group delay as standard binary intensity modulation. So, PolDM is an attractive multilevel modulation scheme to solve capacity problems with low additional effort.

© Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |

  1. A. R. Chraplyvy, A. H. Gnauck, R. W. Tkach, J. L. Zyskind, J. W. Sulhoff, A. J. Lucero, Y. Sun, R. M. Jopson, F. Forghieri, R. M. Derosier, C. Wolf and A. R. McCormick, "1-Tb/s Transmission Experiment", IEEE Photon. Techn. Lett. 8, 1264-1266 (1996)
    [CrossRef]
  2. C. D. Poole and R. E. Wagner, "Phenomenological approach to polarization dispersion in long single-mode fibers," Electron. Lett. 22, 1029-1030 (1986)
    [CrossRef]
  3. R. No�, D. Sandel and F. W�st, "Polarization mode dispersion tolerance of bandwidth-efficient multilevel modulation schemes," Optical Fiber Communications Conference 2000, (Optical Society of America, Washington, D.C., 2000) WL4.
  4. S. Hinz, R. No�, D. Sandel and F. W�st, "Tolerance of bandwidth-efficient optical multilevel modulation schemes against polarization mode dispersion," Springer, Electrical Engineering (accepted), http://link.springer.de/
  5. G. Mohs, M. Stadler, C. F�rst, H. Geiger and G. Fischer, "Maximum link length versus data rate for SPM limited transmission systems," European Conference on Optical Communication 2000, Munich, Germany, Vol. 3, pp. 191-192, Sept 3-7 2000, http://www.vde.de/
  6. R. No�, D. Sandel, M. Yoshida-Dierolf, S. Hinz, V. Mirvoda, A. Sch�pflin, C. Glingener, E. Gottwald, C. Scheerer, G. Fischer, T. Weyrauch and W. Haase, "Polarization mode dispersion compensation at 10, 20, and 40 Gb/s with various optical equalizers," J. Lightwave Technol. 17, 1602-1616 (1999)
    [CrossRef]
  7. F. Liu et al., "A novel chirped return-to-zero transmitter and transmission experiments," European Conference on Optical Communication 2000, Munich, Germany, Vol. 3, pp. 113-114, Sept 3 - 7 2000, http://www.vde.de/
  8. T. Ito et al., "6.4 Tb/s (160 x 40 Gb/s) WDM transmission experiment with 0.8 bit/Hz spectral efficiency," European Conference on Optical Communication 2000, Munich, Germany, post-deadline paper 1.1, Sept 3 - 7 2000, http://www.vde.de/.

Other

A. R. Chraplyvy, A. H. Gnauck, R. W. Tkach, J. L. Zyskind, J. W. Sulhoff, A. J. Lucero, Y. Sun, R. M. Jopson, F. Forghieri, R. M. Derosier, C. Wolf and A. R. McCormick, "1-Tb/s Transmission Experiment", IEEE Photon. Techn. Lett. 8, 1264-1266 (1996)
[CrossRef]

C. D. Poole and R. E. Wagner, "Phenomenological approach to polarization dispersion in long single-mode fibers," Electron. Lett. 22, 1029-1030 (1986)
[CrossRef]

R. No�, D. Sandel and F. W�st, "Polarization mode dispersion tolerance of bandwidth-efficient multilevel modulation schemes," Optical Fiber Communications Conference 2000, (Optical Society of America, Washington, D.C., 2000) WL4.

S. Hinz, R. No�, D. Sandel and F. W�st, "Tolerance of bandwidth-efficient optical multilevel modulation schemes against polarization mode dispersion," Springer, Electrical Engineering (accepted), http://link.springer.de/

G. Mohs, M. Stadler, C. F�rst, H. Geiger and G. Fischer, "Maximum link length versus data rate for SPM limited transmission systems," European Conference on Optical Communication 2000, Munich, Germany, Vol. 3, pp. 191-192, Sept 3-7 2000, http://www.vde.de/

R. No�, D. Sandel, M. Yoshida-Dierolf, S. Hinz, V. Mirvoda, A. Sch�pflin, C. Glingener, E. Gottwald, C. Scheerer, G. Fischer, T. Weyrauch and W. Haase, "Polarization mode dispersion compensation at 10, 20, and 40 Gb/s with various optical equalizers," J. Lightwave Technol. 17, 1602-1616 (1999)
[CrossRef]

F. Liu et al., "A novel chirped return-to-zero transmitter and transmission experiments," European Conference on Optical Communication 2000, Munich, Germany, Vol. 3, pp. 113-114, Sept 3 - 7 2000, http://www.vde.de/

T. Ito et al., "6.4 Tb/s (160 x 40 Gb/s) WDM transmission experiment with 0.8 bit/Hz spectral efficiency," European Conference on Optical Communication 2000, Munich, Germany, post-deadline paper 1.1, Sept 3 - 7 2000, http://www.vde.de/.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (6)

Fig. 1.
Fig. 1.

DGD for total eye closure vs. duty cycle d using interleaved (dashed) and noninterleaved (solid) pulses. For 2-IM the eye is closed at DGD=0.5T (reference).

Fig. 2.
Fig. 2.

Worst-case non-interleaved PolDM data RX eye diagrams for DGD/T=0.125 (a), 0.25 (b) and 0.375 (c) as well as for interleaved PolDM, DGD/T=0.125 (d) and 0.25 (e). For comparison, an undistorted eye in the absence of PMD is also shown (f).

Fig. 3.
Fig. 3.

System penalty vs. DGD (left) and vs. interleave time t (right), duty cycle d=0.34

Fig. 4.
Fig. 4.

2×20 Gb/s PolDM transmission setup; MOD: LiNbO3 modulator, PBS: polarization beam splitter, DSF: dispersion shifted fiber, PMF: polarization maintaining fiber, EPT: endless polarization transformer, POL: polarizer

Fig. 5.
Fig. 5.

Simulated (a) and measured (b) worst case eye diagrams for PolDM on a high speed monitor receiver for DGD/T=0, 0.125 and 0.18 (from left to right).

Fig. 6.
Fig. 6.

Simulated Q-factor for 2-IM and PolDM modulation schemes (left); Q-factor measurement in a PolDM transmission system in the presence of PMD (right)

Metrics