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单模光纤因其损耗低、无模间色散,以及有潜在的经济特性,作为传输介质是非常吸引人的。尤其是在1.55μm下损耗低到0.17dB/km的色散位移光纤,可以采用多纵横模光器光源供长距离高效率应用,能在数据速率高于1Gbit/s的情况下实现100km以上的无中继距离传输。上述一些优点使单模光纤对要求费用低廉及数据传输速率低的应用场合也颇有吸引力。激光发射器及与之有关的控制线路乃是这种系统的昂贵因素,为此,我们采用了1.55μm边发射的(ELED)LED作单模系统的光源。这种ELED有潜在的经济能力,容易控制,并且揭示了这样一种可能,即色散位移光纤会变成从几个Mbit/s系统到多个Gbit/s激光系统的工业用规范化光纤。
Single-mode fiber is attractive as a transmission medium due to its low loss, no intermodular dispersion, and potentially economic properties. In particular, dispersion-shifted fibers with a loss as low as 0.17 dB / km at 1.55 μm can be used with long vertical and horizontal mode light sources for long-distance and high-efficiency applications, achieving over 100 km at data rates above 1 Gbit / s Relay distance transmission. Some of these advantages make single-mode fiber attractive for applications that require low cost and low data rates. Laser emitters and their associated control circuitry are expensive for this system, and for that reason we used a 1.55μm edge-emitting (ELED) LED as the light source for a single-mode system. This ELED has the potential to be economically viable and easy to control, and reveals the possibility that dispersion-shifted fibers will become the industry-standard fibers from several Mbit / s systems to multiple Gbit / s laser systems.