Affiliation:
1. Sun Yat-Sen University
2. China & Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
3. Jinan University
4. Fiberhome Telecommunication Technologies Co. Ltd.
Abstract
We demonstrate 112 orbital angular momentum (OAM) modes amplification based on a designed and fabricated 7-ring-core erbium-doped fiber (7RC-EDF). The differential mode gain (DMG) of all the intra-core OAM modes in 7RC-EDF is effectively reduced. The DMG of intra-core modes can be suppressed by the high overlap between the signal modes and pump fundamental mode resulting from the designed structures of the ring core assisted by a trench. The differential gain of the inter-core can be controlled by the power of the core-pump configuration as well. With an experimentally optimized scheme of the pump power of each core, a record low-DMG of 2.8 dB among the 112 OAM modes (16-OAM-mode per core in the 7-core) is achieved at a wavelength of 1550 nm. The obtained favorable performance of the 112 OAM modes based on 7RC-EDF indicates it may promote a long-haul high-density OAM modes multiplexed transmission.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Guang Dong Basic and Applied Basic Research Foundation
Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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