Research on mode division multiplexer with graded-index distribution,low loss and low crosstalk

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2018,（5）
• 页码范围: 336-341
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11801-018-8051-8

摘要

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 graded-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 average 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.