40Gb/s high-speed communication system has many advantages and could be widely
used in future. But there are also many factors affecting this system; especially PMD is one of the
most important factors. In this paper, we focus on analyzing the influence of PMD. With analyzing
the reasons which caused PMD, we improved Fiber Spinning Unit (FSU) and developed spinning
process independently. Through spinning fiber in a sinusoidal way, controlling the amplitude and
frequency of the spinning wheels, we dramatically reduced the value of PMD (≤0.03 ps - km-1/2).
Finally, we tested the value of PMD in different situations, such as PMD of single plate fiber,
PMD in optical fiber link and PMD in simulative optical cable. The results indicated that PMD
can be strongly reduced by spinning fiber while drawing and the fiber links could also have lower
PMD. So fibers with low PMD can be well used by different network operators with good effect
in return.
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