Experimental demonstration of beaconless beam displacement tracking for an orbital angular momentum multiplexed free-space optical link

Long Li, Runzhou Zhang, Guodong Xie, Yongxiong Ren, Zhe Zhao, Zhe Wang, Cong Liu, Haoqian Song, Kai Pang, Robert Bock, Moshe Tur, Alan E. Willner

Research output: Contribution to journalArticlepeer-review

Abstract

In this Letter, we experimentally demonstrate beaconless beam displacement tracking for free-space optical communication link multiplexing multiple orbital angular momentum (OAM) beams, where the data-carrying OAM beams are used for position detection. 400 Gbit/s data transmission is demonstrated under emulated lateral displacement of up to 10 mm with power penalties of less than 3 dB for all channels. Channel crosstalk is reduced by the beam tracking system to below −18 dB. Moreover, we investigate using a Gaussian beacon for beam displacement tracking, and achieve similar channel crosstalk and power penalties, compared with using the beaconless beam tracking.

Original languageEnglish
Pages (from-to)239-2395
Number of pages2157
JournalOptics Letters
Volume43
Issue number10
DOIs
StatePublished - 15 May 2018

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