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Reach extension of CWDM transmission systems using SOAs

机译:使用SOA扩展CWDM传输系统

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摘要

Recently, CWDM transmission systems have attracted considerable interest from system providers. By relaxing component tolerances and eliminating the need for cooled transmission sources, CWDM systems offer a cost-effective way of delivering broadband optical services within metropolitan and enterprise networks carrying Gigabit Ethernet, Fibre Channel, OC-3/-12/-48 (STM-1/-4/-16), and cable TV. The CWDM spectrum covers the wave- length range between 1260 and 1620 nm. Due to high fiber attenuation from Rayleigh scattering, the first two wavelengths are normally neglected, which leaves a total of 18 channels spaced at 20-nm intervals between 1270 and 1610 nm. However, conventional singlemode fibers show significant attenuation around 1400 nm due to the water absorption peak. Consequently, the number of viable CWDM channels drops to 12 channels-three in the range between 1310 and 1350 nm and nine between 1450 and 1610. nm.
机译:最近,CWDM传输系统引起了系统提供商的极大兴趣。通过放宽组件公差并消除对冷却传输源的需求,CWDM系统提供了一种经济高效的方式,可在承载千兆以太网,光纤通道,OC-3 / -12 / -48(STM- 1 / -4 / -16)和有线电视。 CWDM光谱覆盖1260至1620 nm之间的波长范围。由于瑞利散射引起的高光纤衰减,通常忽略了前两个波长,因此总共留下了18个通道,在1270和1610 nm之间以20 nm的间隔隔开。但是,由于吸水峰,常规的单模光纤在1400 nm附近显示出明显的衰减。因此,可用的CWDM通道数下降到12个通道-在1310和1350 nm之间的范围内为三个,在1450和1610 nm之间的范围内为9个。

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