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由于出现了供单模二氧化硅光纤损耗最小的1.55μm波长下应用的优质单频注入式激光器,所以能够进行高数据速率、长距离的传输。最近的示范实验系统表明,采用1.5μm的单频激光器在420 Mbit/s和2 Gbit/s下,分别将传输距离推进到203 km和130 km。向更高的比特率和更长的间距稳定推进的步子是以比特率和距离的乘积来表示,这一乘积在五年多的时间里,每年提高一倍,至今,未达终点,但事情已经清楚,数千兆比特的数据速
High-speed, long-distance transmission is possible due to the presence of a high-quality single-frequency injection laser at a wavelength of 1.55 μm with the lowest loss of single-mode silica fibers. Recent demonstration experiments show that the transmission distance is advanced to 203 km and 130 km respectively at 420 Mbit / s and 2 Gbit / s using a 1.5-μm single-frequency laser. Stable steps toward higher bitrates and longer intervals are expressed as the product of bit rate and distance, which multiplies by more than five years in a year, up to the end, but things It is clear that there are several gigabits of data speed