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报道了２．５Ｇｂ／ｓ直接调制光信号的２００公里常规单模光纤传输实验，系统中采用了基于色散位移光纤中四波混频效应的中点谱反转技术以补偿光纤色散的影响。
A 200 km conventional single mode optical fiber transmission experiment of 2.5Gb / s direct modulated optical signal is reported. The midpoint spectral inversion technique based on the four-wave mixing effect in dispersion-shifted optical fiber is used to compensate the influence of optical fiber dispersion.