Directly using 8.8-km conventional multi-mode fiber for 6-mode orbital angular momentum multiplexing transmission

作者：Wang, Andong; Zhu, Long; Wang, Lulu; Ai, Jianzhou; Chen, Shi; Wang, Jian^*

来源：Optics Express, 2018, 26(8): 10038-10047.

DOI：10.1364/OE.26.010038

• FEW-MODE FIBER
• LIGHT
• DSP

Twisted light carrying orbital angular momentum (OAM), which featuring helical phase front, has shown its potential applications in diverse areas, especially in optical communications in free space and specially designed fibers, e.g. a vortex fiber. Instead of specially designed fibers extensively used in the reported OAM-based fiber transmission experiments, here we demonstrate the viability of a conventional graded-index multi-mode fiber (MMF) for OAM multiplexing transmission with less digital signal processing (DSP) complexity. We demonstrate a 120-Gbit/s quadrature phase-shift keying (QPSK) signal transmission in an 8.8-km OM4 MMF by using OAM mode multiplexing with all the modes in the first two mode-groups (OAM(01)(L), OMA(01)(R), OAM(+11)(L), OAM(-11)(L), OAM(-11)(R)) with only 2 x 2 and 4 x 4 multiple-input-multiple-output (MIMO) equalization. Moreover. we demonstrate the data-carrying two OAM mode groups multiplexing transmission over the 8.8-km MIMF without MIMO equalization. These demonstrations may open up new perspectives to enable the realistic use of OAM-based MME solution in data centers and super-computers.

• 出版日期2018-4-16
• 单位华中科技大学