Amplifying Orbital Angular Momentum Modes in Ring-Core Erbium-Doped Fiber
Amplifying Orbital Angular Momentum Modes in Ring-Core Erbium-Doped Fiber
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DOI：
10.34133/2020/7623751
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发表时间：
2020-02
期刊：
影响因子：
11
通讯作者：
Jun Liu;Shi Chen;Hongya Wang;Shuang Zheng;Long Zhu;Andong Wang;Lulu Wang;Cheng Du;Jian Wang
中科院分区：
文献类型：
--
作者：
Jun Liu;Shi Chen;Hongya Wang;Shuang Zheng;Long Zhu;Andong Wang;Lulu Wang;Cheng Du;Jian Wang
大量的研究工作已经致力于使用轨道角动量（OAM）复用来增加光通信中的传输容量。为了实现长距离OAM模式传输，需要在线OAM光纤放大器。环芯光纤（RCF）被认为是一种较好的设计，在光纤中稳定的OAM模式传播。在这里，我们展示了一个OAM光纤放大器的基础上制造的环芯掺铒光纤（RC-EDF）。我们表征的RC-EDF辅助OAM光纤放大器的性能，并证明其在OAM复用通信与OAM模式进行正交相移键控（QPSK）和正交幅度调制（QAM）信号的使用。在数据承载OAM分复用和波分复用系统中，演示了两种OAM模式在四个波长上的放大。实验结果表明，这种RC-EDF辅助的OAM光纤放大器具有良好的性能。这些演示可能为采用OAM模式的容量扩展光纤通信的长途传输开辟新的前景。
Lots of research efforts have been devoted to increase the transmission capacity in optical communications using orbital angular momentum (OAM) multiplexing. To enable long-haul OAM mode transmission, an in-line OAM fiber amplifier is desired. A ring-core fiber (RCF) is considered to be a preferable design for stable OAM mode propagation in the fiber. Here, we demonstrate an OAM fiber amplifier based on a fabricated ring-core erbium-doped fiber (RC-EDF). We characterize the performance of the RC-EDF-assisted OAM fiber amplifier and demonstrate its use in OAM multiplexing communications with OAM modes carrying quadrature phase-shift keying (QPSK) and quadrature amplitude modulation (QAM) signals. The amplification of two OAM modes over four wavelengths is demonstrated in a data-carrying OAM-division multiplexing and wavelength-division multiplexing system. The obtained results show favorable performance of the RC-EDF-assisted OAM fiber amplifier. These demonstrations may open up new perspectives for long-haul transmission in capacity scaling fiber-optic communications employing OAM modes.