光电子快报(英文版), 2018, 14 (5): 336, Published Online: Apr. 16, 2019
Research on mode division multiplexer with graded-index distribution, low loss and low crosstalk
Abstract
A graded-index mode division multiplexer with low loss and low crosstalk is proposed. The transmission channel adopts a pure silica core with large effective area to achieve low attenuation, which effectively reduces the splicing loss with pure silica core few-mode transmission fiber. Low differential mode group delay is realized by using grad-ed-index distribution. Also the effective index difference of the modes is greater than 0.5×10-3 to ensure low crosstalk between modes. The performance of the mode division multiplexer is investigated using the beam propagation method and full-vector finite element method. The result shows that the coupling efficiency of multiplexer is better than .0.479 dB, and the extinction ratio is higher than 31.2 dB in the wavelength of 1 400—1 700 nm. In C band, the aver-age coupling efficiency of all mode channels of multiplexer is better than that of .0.140 dB, which shows flatness. The proposed scheme is an effective way to implement a multiplexer with low crosstalk, low loss, low fusion loss, high coupling efficiency, high extinction ratio and wide operating band.
LIU Qian-qian, ZHENG Hong-jun, LI Xin, BAI Cheng-lin, HU Wei-sheng, YU Ru-yuan. Research on mode division multiplexer with graded-index distribution, low loss and low crosstalk[J]. 光电子快报(英文版), 2018, 14(5): 336.