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Crystals 2017, 7(10), 286; doi:10.3390/cryst7100286

The Orbital Angular Momentum Modes Supporting Fibers Based on the Photonic Crystal Fiber Structure

1
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
2
School of Ethnic Minority Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
3
School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China
*
Author to whom correspondence should be addressed.
Academic Editor: Helmut Cölfen
Received: 24 July 2017 / Revised: 20 September 2017 / Accepted: 20 September 2017 / Published: 6 October 2017
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Abstract

The orbital angular momentum (OAM) of light can be another physical dimension that we exploit to make multiplexing in the spatial domain. The design of the OAM mode supporting fiber attracts many attentions in the field of the space division multiplexing (SDM) system. This paper reviews the recent progresses in photonic crystal fiber (PCF) supporting OAM modes, and summarizes why a PCF structure can be used to support stable OAM transmission modes. The emphasis is on the circular PCFs, which possess many excellent features of transmission performance, such as good-quality OAM modes, enough separation of the effective indices, low confinement loss, flat dispersion, a large effective area, and a low nonlinear coefficient. We also compare the transmission properties between the circular PCF and the ring core fiber, as well as the properties between the OAM EDFA based on circular PCF and the OAM EDFA based on the ring core fiber. At last, the challenges and prospects of OAM fibers based on the PCF structure are also discussed. View Full-Text
Keywords: space division multiplexing; mode division multiplexing; fiber design and fabrication; orbital angular momentum; photonic crystal fibers space division multiplexing; mode division multiplexing; fiber design and fabrication; orbital angular momentum; photonic crystal fibers
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Zhang, H.; Zhang, X.; Li, H.; Deng, Y.; Xi, L.; Tang, X.; Zhang, W. The Orbital Angular Momentum Modes Supporting Fibers Based on the Photonic Crystal Fiber Structure. Crystals 2017, 7, 286.

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