Polarization-insensitive PAM-4-carrying free-space orbital angular momentum (OAM) communications
Polarization-insensitive PAM-4-carrying free-space orbital angular momentum (OAM) communications
复制标题
偏振不敏感的 PAM-4 承载自由空间轨道角动量 (OAM) 通信
DOI：
10.1364/oe.24.004258
复制
发表时间：
2016-02-22
期刊：
影响因子：
3.8
通讯作者：
Wang, Jian
中科院分区：
文献类型：
--
作者：
Liu, Jun;Wang, Jian
We present a simple configuration incorporating single polarization-sensitive phase-only liquid crystal spatial light modulator (SLM) to facilitate polarization-insensitive free-space optical communications employing orbital angular momentum (OAM) modes. We experimentally demonstrate several polarization-insensitive optical communication subsystems by propagating a single OAM mode, multicasting 4 and 10 OAM modes, and multiplexing 8 OAM modes, respectively. Free-space polarization-insensitive optical communication links using OAM modes that carry four-level pulse-amplitude modulation (PAM-4) signal are demonstrated in the experiment. The observed optical signal-to-noise ratio (OSNR) penalties are less than 1 dB in both polarization-insensitive N-fold OAM modes multicasting and multiple OAM modes multiplexing at a bit-error rate (BER) of 2e-3 (enhanced forward-error correction (EFEC) threshold). (C)2016 Optical Society of America
