Generation of Orbital Angular Momentum Beam Using Fiber-to-Fiber Butt Coupling

Generation of Orbital Angular Momentum Beam Using Fiber-to-Fiber Butt Coupling

We experimentally demonstrate a simple scheme for broadband generation of orbital angular momentum (OAM) using a fiber-based structure. A standard single-mode fiber (SMF) is stuck to a two-mode fiber (TMF) with specific offsets and tilt angles to realize high-order fiber mode conversion. By adjustin...

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Bibliographic Details
Main Authors: Shuhui Li, Zhe Xu, Ruixuan Zhao, Li Shen, Cheng Du, Jian Wang
Format: Article
Language:English
Published: IEEE 2018-01-01
Series:IEEE Photonics Journal
Subjects:
Optical vortices
fiber optics.
Online Access:https://ieeexplore.ieee.org/document/8411117/
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Summary:We experimentally demonstrate a simple scheme for broadband generation of orbital angular momentum (OAM) using a fiber-based structure. A standard single-mode fiber (SMF) is stuck to a two-mode fiber (TMF) with specific offsets and tilt angles to realize high-order fiber mode conversion. By adjusting the polarization controllers implemented on the SMF and TWF accompanied with a polarizer filter, one can selectively obtain LP<sub>11</sub> mode or OAM modes with <italic>l</italic> &#x003D; &#x00B1;1 at the output end of the TMF. We show the high-purity (extinction ratio &#x003E;20 dB) generation of OAM modes within a wide range from 1480 to 1640 nm.
ISSN:1943-0655

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