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Published on: August 5, 2013
High-order orbital angular momentum mode generator based on twisted photonic crystal fiber
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 -20 dB.
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