Abstract

The space domain is regarded as the only known physical dimension of lightwaves left to be exploited for optical communications. Very recently, much research effort has been devoted to using orbital angular momentum (OAM) spatial modes to increase the transmission capacity in fiber-optic communications. However, long-distance low-crosstalk high-order OAM multiplexing transmission in fiber is quite challenging. Here we design and fabricate a graded-index ring-core fiber to effectively suppress radially high-order modes and greatly separate high-order OAM mode groups. By exploiting high-order OAM mode group multiplexing, together with wavelength-division multiplexing (WDM), i.e., 12.5 Gbaud 8-array quadrature amplitude modulation (8-QAM) signals over OAM+4 and OAM+5 modes on 112 WDM channels (224 individual channels), we experimentally demonstrate 8.4 Tbit/s data transmission in an 18 km OAM fiber with low crosstalk. Multiple-input multiple-output digital signal processing is not required in the experiment because of the large high-order mode group separation of the OAM fiber. The demonstrations may open a door to find more fiber-optic communication and interconnect applications exploiting high-order OAM modes.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Scalable mode division multiplexed transmission over a 10-km ring-core fiber using high-order orbital angular momentum modes

Guoxuan Zhu, Ziyang Hu, Xiong Wu, Cheng Du, Wenyong Luo, Yujie Chen, Xinlun Cai, Jie Liu, Jiangbo Zhu, and Siyuan Yu
Opt. Express 26(2) 594-604 (2018)

Orbital-angular-momentum mode-group multiplexed transmission over a graded-index ring-core fiber based on receive diversity and maximal ratio combining

Junwei Zhang, Guoxuan Zhu, Jie Liu, Xiong Wu, Jiangbo Zhu, Cheng Du, Wenyong Luo, Yujie Chen, and Siyuan Yu
Opt. Express 26(4) 4243-4257 (2018)

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

Andong Wang, Long Zhu, Lulu Wang, Jianzhou Ai, Shi Chen, and Jian Wang
Opt. Express 26(8) 10038-10047 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription