All-fiber pre- and post-data exchange in km-scale fiber-based twisted lights multiplexing

作者：Liu, Jun; Zhu, Long; Wang, Andong; Li, Shuhui; Chen, Shi; Du, Cheng; Mo, Qi; Wang, Jian^*

来源：Optics Letters, 2016, 41(16): 3896-3899.

DOI：10.1364/OL.41.003896

• ORBITAL ANGULAR-MOMENTUM
• OPTICAL NETWORK
• TRANSMISSION

Twisting light with orbital angular momentum (OAM) provides an alternative way to facilitate space-division multiplexing (SDM). Both twisted light (OAM modes) multiplexing transmission and data processing functions would be highly desired in a robust OAM-assisted SDM (OAM-SDM) network. In this Letter, we propose and demonstrate flexible all-fiber pre- and post-data exchange functions in a fiber-based OAM-SDM network. OAM(+1) and OAM(-1) modes carrying 5 Gbit/s four-level pulse amplitude modulation signals are multiplexed to transmit through a 1.1 km OAM fiber in the system. Two simple and controllable data exchange control units are placed at the front end and the back end of the OAM fiber to demonstrate pre- and post-data exchange functions between the OAM(+1) and OAM(-1) modes. The measured optical signal-to-noise ratio penalties at a bit-error rate of 2 x 10(-3) (enhanced forward-error correction threshold) for pre- and post-data exchange operations are less than 3.2 dB with crosstalk. The OAM data exchange functions could potentially enhance the flexibility of data management at network nodes in OAM-SDM networks.

• 出版日期2016-8-15
• 单位华中科技大学; 武汉邮电科学研究院