Abstract
Higher bit-rate transmission is attractive for improving network resource
efficiency and reducing the complexity of network management in future transmission
systems. However, chromatic dispersion and polarization mode dispersion (PMD) are one of
the most serious impairments. In particular, PMD should be compensated for dynamically
because it changes rapidly according to environmental variations such as temperature
change and mechanical vibration. Therefore, an adaptive PMD compensator is indispensable
for higher bit-rate transmission systems. In this paper, we employed a simple and
bit-rate independent PMD compensator based on a polarizer with an optical power
monitoring scheme in 160 Gb/s-based field experiments. By using the PMD compensator, the
single channel transmission of a 160 Gb/s return-to-zero differential phase-shift-keying
modulation signal over an installed fiber link with buried and aerial cable routes was
successfully achieved. Approximately 1 dB of ${Q}$-factor was improved by using the PMD
compensator when PMD impairment was maximized. Through these experiments, the
effectiveness of the PMD compensator in the higher bit-rate transmission systems was
confirmed in the field environment. Furthermore, single-polarization 8$\,\times\,$160
Gb/s wavelength division multiplexing transmission over the installed 200 km standard
single mode fiber without polarization demultiplexing was successfully achieved by using
the simple PMD compensator.
© 2009 IEEE
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