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在基于宽带CFBG色散补偿的G.652光纤中,40Gbps NRZ码无电中继传输500km,在误码率BER=10-10下的功率代价约为2.2dB,积累1h的误码率为7.3×10-12。传输系统中采用的CFBG的3dB带宽约为1.2nm,中心波长处时延纹波小于25ps,反射谱纹波小于2dB,差分群时延小于1ps。传输时采用低成本的温控法取代昂贵的电路评估版稳定LiNbO3调制器的直流偏置点,实验效果显著。
In the G.652 fiber based on wideband CFBG dispersion compensation, the 40Gbps NRZ code transmits 500km without electricity, and the power cost under the bit error rate BER = 10-10 is about 2.2dB. The bit error rate accumulated for 1h is 7.3 × 10-12. The 3dB bandwidth of the CFBG used in the transmission system is about 1.2 nm, the delay ripple at the center wavelength is less than 25 ps, the reflection spectrum ripple is less than 2 dB and the differential group delay is less than 1 ps. Low-cost temperature control method is used to replace the DC bias point of an expensive circuit evaluation version of a stable LiNbO3 modulator for transmission. The experimental results are significant.