Abstract

In this Letter, we demonstrate a way to make single-crystal LiNbO3 optical fibers with silica glass cladding and In2O3-SnO (ITO) electrodes embedded between core and cladding with a one-step drawing process with the CO2 laser-heated pedestal growth technique. A half-wave voltage (Vπ) of 6.6 V, effective electro-optic coefficient of 23.6pm/V, and transmission loss of 0.89dB/cm was achieved in the single-crystal LiNbO3 optical fiber with core diameter of 9 μm and electrode distance of 50 μm. Furthermore, the technique can be applicable to make other single-crystal core optical fibers with ITO-embedded electrodes, which could potentially enable many electrically tunable fiber devices along with the unique property of the single-crystal core.

© 2013 Optical Society of America

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