多模光纤模间色散的电均衡补偿

Compensation for the Intra-Modal Dispersion in Multimode Fiber Using Electronic Equalizers

在不同的参数条件下,用中心差分法数值计算了多模光纤的波动方程,得到LP模场分布函数,再通过数值计算迭加积分得到激光器激发出的模功率分布,进而得到多模光纤的功率转移函数.基于线性前馈均衡和判决反馈均衡对模间色散的电域补偿进行了仿真研究.结果表明,采用判决反馈均衡能使10 Gbit/s速率的信号在已敷设的多模光纤上传输300 m,色散导致的功率劣化小于4 dB.

Wave-guide function in multimode fiber is solved using central difference method to get the linearly polarized mode distribution and double integral is done to get the mode power distribution by laser inspirited, Two steps are the key to calculate the optical power transfer function （OPTF）, At last equalization simulation is carried out and the results show that for 300 meter distance 4 dB dispersion performance requirement of 10 Gbit/s Ethernet can be satisfied by using decision feedback equalization,