Weakly-coupled real-time SDM technology for short-reach optical transmission

Yuyang GAO; Juhao LI; Yongqi HE; Zhangyuan CHEN

doi:10.11959/j.issn.1000-0801.2022165

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Weakly-coupled real-time SDM technology for short-reach optical transmission

Topic: Future Optical Communication Technology | 更新时间：2024-06-05

- Weakly-coupled real-time SDM technology for short-reach optical transmission
- Telecommunications Science Vol. 38, Issue 7, Pages: 31-36(2022)
- 作者机构：
  
  1. 北京大学区域光纤通信网与新型光通信系统国家重点实验室，北京 100871
  2. 鹏城实验室，广东深圳 518055
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2022165
  CLC： TP393
- Published Online：2022-07，
  
  Published：20 July 2022
- 稿件说明：
移动端阅览
Yuyang GAO, Juhao LI, Yongqi HE, et al. Weakly-coupled real-time SDM technology for short-reach optical transmission[J]. Telecommunications science, 2022, 38(7): 31-36.
DOI：

Yuyang GAO, Juhao LI, Yongqi HE, et al. Weakly-coupled real-time SDM technology for short-reach optical transmission[J]. Telecommunications science, 2022, 38(7): 31-36. DOI： 10.11959/j.issn.1000-0801.2022165.

摘要

短距离光纤传输系统的容量扩展受到越来越广泛的关注。空分复用光传输技术提供了纤芯和模式两个新维度，可以大大提升单根光纤的传输容量。然而空间信道间的串扰严重限制了空分复用技术的实用化。首先研究了弱耦合空分复用光纤，通过在纤芯引入环形折射率微扰的方法实现了模式之间的有效分离；其次，提出了一种可以处理非圆对称简并模式的全光纤复用/解复用器件以及低插损、低串扰扇入扇出器；在此基础上，使用低成本商用强度调制直接检测光模块，实现了短距离弱耦合模分复用及多芯少模复用实时光传输；最后对空分复用实时光传输技术进行了展望。

Abstract

The capacity upgrade of short-reach optical fiber transmission has received more and more attention.Spatial division multiplexing provides two new dimensions of fiber core and mode

which can greatly increase the transmission capacity of a single fiber.However

the crosstalk between spatial channels severely limits the practical application of space division multiplexing technology.To address the problem

a weakly-coupled space-division multiplexing fiber was firstly designed

in which perturbed rings were introduced in the core to increase the effective refractive index difference between LP modes.Secondly

an all-fiber mode multiplexer/demultiplexer that could handle non-circularly symmetric degenerate LP modes was proposed

as well as a low insertion loss and low crosstalk fan-in and fan-out devices.Based on the proposed fiber and devices

the low-cost intensity modulation and direct detection were used to implement the short-reach weakly-coupled mode-division-multiplexing and multi-core and few-mode real-time transmission.Finally

the prospective of space-division multiplexing real-time optical transmission technology was discussed.

关键词

Keywords

references

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