All-Fiber Multiplexing and Transmission of High-Order Circularly Polarized Orbital Angular Momentum Modes With Mode Selective Couplers

All-Fiber Multiplexing and Transmission of High-Order Circularly Polarized Orbital Angular Momentum Modes With Mode Selective Couplers

We have demonstrated an all-fiber high-order circularly polarized (CP) orbital angular momentum (OAM) modes (de)multiplexing system based on second-order mode selective couplers (SMSCs). Such SMSCs combining standard single mode fiber and ring core fiber (RCF) are fabricated by a fusing and pulling...

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Bibliographic Details
Main Authors: Junfeng Yang, Huanhuan Liu, Fufei Pang, Jianxiang Wen, Haoqiang Zheng, Lifei Chen, Xinyu He, Yana Shang, Na Chen, Yingchun Li, Tingyun Wang
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Photonics Journal
Subjects:
Orbital angular momentum
ring core fiber
second-order mode selective coupler.
Online Access:https://ieeexplore.ieee.org/document/8693638/
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Summary:We have demonstrated an all-fiber high-order circularly polarized (CP) orbital angular momentum (OAM) modes (de)multiplexing system based on second-order mode selective couplers (SMSCs). Such SMSCs combining standard single mode fiber and ring core fiber (RCF) are fabricated by a fusing and pulling technique, in which the RCF supports second-order vector modes (HE<sub>31</sub> and EH<sub>11</sub>). During a pulling process, the HE<sub>31</sub> and EH<sub>11</sub> modes could be excited along the coupling region through evanescent wave interaction. By adjusting the polarization states, the excited second-order modes are transformed into two sets of second-order CP OAM (CP-OAM<sub>&#x00B1;2</sub>) modes and then transmit along the RCF. The second-order CP-OAM<sub>&#x00B1;2</sub> modes, carrying a 2.95-Gb&#x002F;s orthogonal frequency division multiplexing signals filled with the 16-level quadrature amplitude modulation signals, are successfully (de)multiplexed and propagated over a 3.7-km RCF. The experimental investigations show that the developed system to multiplex and transmit CP-OAM<sub>&#x00B1;2</sub> can achieve forward error correction threshold that the received optical power is larger than &#x2212;13&#x00A0;dBm. The obtained results show that the OAM modes can be generated, (de)multiplexed, and effectively transmitted in the RCF with favorable performance by the designed SMSCs.
ISSN:1943-0655

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