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针对传统大啁啾FBG色散补偿技术中色散曲线线性度难以控制的问题,分析了相对啁啾系数比值与色散线性度之间的关系,依此提出一种基于大啁啾FBG的中继色散补偿器设计方案。该补偿器通过调节一阶和二阶啁啾系数的比值,实现色散曲线线性度可调的功能,且具有补偿带宽范围大、适合WDM系统远程中继补偿的特点。将该设计作为中继补偿器配置在500 km、8通道WDM系统中进行模拟实验,论证了该补偿器的效果。
Aiming at the problem that the linearity of dispersion curve in conventional large chirp FBG dispersion compensation is difficult to control, the relationship between relative chirp factor ratio and chromatic dispersion linearity is analyzed. Based on this, a chirped FBG based chromatic dispersion compensation Device design. By compensating the ratio of first-order and second-order chirp coefficients, the compensator can realize the function of adjustable linearity of the dispersion curve and has the characteristics of wide compensation bandwidth and suitable for remote relay compensation in WDM system. The design as a relay compensator configuration in 500 km, 8-channel WDM system simulation experiments demonstrate the effect of the compensator.