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Optica Publishing Group
  • Optical Fiber Communication Conference
  • 1996 OSA Technical Digest Series (Optica Publishing Group, 1996),
  • paper PD2

Error free 8×10 Gbit/s WDM transmission over 360 km of non-zero dispersion shifted fiber without dispersion management

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We demonstrate error free transmission of 8 × 10 Gbit/s WDM channels with an equal spacing of 200 GHz (~1.6 nm) over 360 km (4 × 90 km) of a non-zero dispersion-shifted, SMF-LSTM, without requiring dispersion management. WDM systems with 10 Gbit/s or higher channel bit-rates have been demonstrated by either employing dispersion management in the cable [11 or periodic dispersion compensation at the optical amplifiers and/or receiver [2-4]. In all cases, the increased bit-rate is obtained at the expense of increasing the system complexity and cost. SMF-LS is a non-zero dispersion shifted fiber, with λ0 ≥ 1560 nm, designed for use in multi-channel high bit-rate applications. The relatively low group velocity dispersion of SMF-LS fiber, less than −3.5 ps/nm/km over the 1530 to 1560 nm range, is large enough to minimize the FWM degradation but small enough to allow 10 Gbit/s transmission over most long-haul terrestrial distances without dispersion compensation. Our experiment was performed in the worst case configuration. Within each fiber span, the fiber segments with the shortest λ0 were placed immediately after each optical amplifier in order to maximize the FWM effect. In this way the dispersion in the high power sections of the transmission line ranged from only −0.08 to −0.25 p s M n m for the longest wavelength channel, 1559.1 nm. Furthermore, the loss of each 90 km span was artificially increased to 23 dB, to match the end of life loss margin of an installed system of equivalent length.

© 1996 Optical Society of America

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