Orbital Angular Momentum Generator based on Elliptical-Core Fiber Chiral Long-period Gratings

Yulu Tian; Minghui Chen; Li Yang

Asia Communications and Photonics Conference (ACP) 2018
OSA Technical Digest (Optica Publishing Group, 2018),
paper M2B.5

Orbital Angular Momentum Generator based on Elliptical-Core Fiber Chiral Long-period Gratings

Yulu Tian, Minghui Chen, and Li Yang

Asia Communications and Photonics Conference 2018

Hangzhou China
26–29 October 2018
ISBN: 978-1-5386-6158-1

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Long-Period Grating Technologies (M2B)

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Y. Tian, M. Chen, and L. Yang, "Orbital Angular Momentum Generator based on Elliptical-Core Fiber Chiral Long-period Gratings," in Asia Communications and Photonics Conference (ACP) 2018, OSA Technical Digest (Optica Publishing Group, 2018), paper M2B.5.

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Abstract

From the viewpoint of coupled-mode theory, the generation and conversion of orbital angular momentum (OAM) beams accompany the mode couplings in the chiral fiber gratings. According to the phase- and angular-matching conditions of mode couplings, OAM generators are designed with the chiral fiber gratings based on a commercially available eccentric elliptic-core fiber. Meanwhile, based on the Mach-Zehnder interferometer, an experimental platform is built for the generation and detection of OAM beams. Finally, the +1st and +2nd order OAM beams are observed successfully, which verifies the coupled-mode analysis.

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