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利用啁啾光纤光栅的应变调谐特性,将色散补偿的啁啾光纤光栅斜贴于悬臂梁的侧面,通过应力实现啁啾量调整而改变其色散补偿量的大小,同时利用固定在同一悬臂梁的均匀布拉格光栅传感器,实现了闭环自动控制色散补偿量,研制出了一种新型的光纤光栅动态色散补偿仪。该色散补偿仪工作在1550nm波段,典型性能数据为:色散动态补偿范围-1000～-1680ps/nm,插入损耗小于1.5dB,动态调谐步进响应时间小于50ms,基本上能满足10Gb/s光纤通信系统中色散动态补偿的要求。
By using the chirped FBG strain-tuning characteristics, the chirped fiber grating with chirped dispersion compensation is obliquely attached to the side of the cantilever beam, and the amount of chromatic dispersion compensation is changed by adjusting the chirp amount through the stress. At the same time, A uniform Bragg grating sensor was used to realize the closed-loop automatic control of the amount of dispersion compensation. A new type of fiber grating dynamic dispersion compensator was developed. The dispersion compensator work in the 1550nm band, the typical performance data: dispersion dynamic compensation range -1000 ~ -1680ps / nm, insertion loss is less than 1.5dB, dynamic tuning step response time is less than 50ms, basically to meet the 10Gb / s optical fiber communication Dispersion dynamic compensation requirements in the system.