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High-order orbital angular momentum mode generator based on twisted photonic crystal fiber

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Abstract

High-order orbital angular momentum (OAM) modes, namely, OAM+5 and OAM+6, were generated and demonstrated experimentally by twisting a solid-core hexagonal photonic crystal fiber (PCF) during hydrogen–oxygen flame heating. Leaky orbital resonances in the cladding depend strongly on the twist rate and length of the helical PCF. Moreover, the generated high-order OAM mode could be a polarized mode. The secret of the successful observation of high-order modes is that leaky orbital resonances in the twisted PCF cladding have a high coupling efficiency of more than 20dB.

© 2018 Optical Society of America

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