Automatic dispersion equalization for installing high-speed optical transmission systems

This paper proposes an optical transmission system with automatic dispersion equalization for exploitation of the fiber capacity without additional installation cost. The system has two operational modes: "measurement-mode" wherein dispersion is measured by phase-to amplitude-modulation conversion, and "data-transmission-mode" for providing telecommunication services. Dispersion equalization is realized by the accompanying use of dispersion compensating devices and wavelength tuning to the zero-dispersion of the optical fibers. Supervisory-channel communication enables remote operation. We demonstrate a simplified system; the dispersion of a 10 Gb/s-1000 km transmission line is successfully equalized in a fully automatic manner. Equalization with the preciseness of 10.1 mn from the zero-dispersion wavelength provides penalty free transmission or better performance with optical input power under the Brillouin threshold.

[1]  Kazuo Hagimoto,et al.  10 Gbit/s, 280 km nonrepeatered transmission with suppression of modulation instability , 1994 .

[2]  M. Nishimura,et al.  Temperature dependence of chromatic dispersion in single mode fibers , 1986 .

[3]  Toshio Morioka,et al.  400 Gbit/s TDM Transmission of 0.98 ps Pulses over 40 km Employing Dispersion Slope Compensation , 1996 .

[4]  Y. Yamabayashi,et al.  Single-wavelength dispersion measurement for multiple-fiber section connected with narrow-band optical amplifiers , 1996 .

[5]  S. Yoshida,et al.  Influence of intensity modulation produced by LD direct modulation on transmission characteristics of CPFSK differential detection system , 1992 .

[6]  Y. Kobayashi,et al.  Fault Localization and Supervisory Channel Implementation for Optical Linear-Repeaters in SDH/SONET-Based Networks , 1996 .

[7]  M. Tomizawa,et al.  Effect of modulation instability on phase modulation-amplitude modulation conversion in optical fibers. , 1995, Optics letters.

[8]  Toshio Morioka,et al.  Single channel 400 Gbit/s time-division-multiplexed transmission of 0.98 ps pulses over 40 km employing dispersion slope compensation , 1996 .

[9]  Tomoyoshi Kataoka,et al.  Nonlinear influence on PM-AM conversion measurement of group velocity dispersion in optical fibres , 1994 .

[10]  Tomoyoshi Kataoka,et al.  Automatic dispersion equalization by tunable laser for installation of high-speed optical transmission system , 1997, Proceedings of Optical Fiber Communication Conference (.

[11]  Tomoyoshi Kataoka,et al.  Automatic dispersion equalization by monitoring extracted-clock power level in a 40-Gbit/s, 200-km transmission line , 1996, Proceedings of European Conference on Optical Communication.

[12]  N. S. Bergano,et al.  Margin measurements in optical amplifier system , 1993, IEEE Photonics Technology Letters.

[13]  K. Hagimoto,et al.  Multigigabit-per-second optical baseband transmission system , 1988 .

[14]  M. Tomizawa,et al.  Measurement of local zero-dispersion wavelength at the input-side of dispersion managed optical fibers , 1997 .