高非线性微结构光纤中2R光再生的实验研究

Experimental Investigation of 2R Optical Regeneration in a Highly Nonlinear Microstructure Fiber

利用80m长的高非线性（HNL）微结构光纤（MF），进行了基于自相位调制（SPM）效应和偏移滤波的全光2R再生实验。采用的MF的非线性系数约为11W^-1·km^-1，具有小的正常色散和平坦的色散特性，在1550m波长处色散值约为-0．58nm^-1·km^-1，而在1550-1650m波长范围内的色散值变化小于1．5ps·m^-1·km^-1。通过调节入射MF的功率和可调谐滤波器的参量，可以实现全光2R再生。

We report the use of an 80 m-long highly nonlinear（HNL） microstrueture fiber（MF） in an all-optical 2R regeneration experiment based on self-phase modulation（SPM） and offset filtering. The experimental MF with a nonlinearity of -11 W^-1· km^-1 has small normal dispersion and is characterized by flattened chromatic dispersion. The chromatic dispersion is about -0. 58 nm^-1· km^-1 at 1 550 nm,and it varies less than 1.5 ps ·nm^-1 · km^-1 between 1 500 and 1 650 nm. By adjusting the input power into the MF and the parameters of the tunable filter,all-optical 2R regeneration is achieved.