Abstract

More than 200 m of germanosilica optical fiber is manufactured with an internal wire electrode running parallel to the core. In this new fabrication method the wire is integrated into the fiber during the draw process. This length of fiber is an order of magnitude longer than other previously reported fibers with internal electrodes. The optical loss is less than our measurement floor of $0.5 \mathrm{dB}/\mathrm{m}$ at 1550 nm. A 0.9-m section of the fiber is thermally poled, inducing a permanent second-order nonlinearity of $0.0125 \mathrm{pm}/\mathrm{V}$. Methods to increase the induced nonlinearity are discussed. Integrating the wire into the fiber during the draw allows lengths of fiber with internal electrodes greater than 1 km to be manufactured and subsequently poled.

© 2004 Optical Society of America

Wide wedge-shaped depletion region in thermally poled fiber with alloy electrodes

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Carbon dioxide laser-assisted poling of silicate-based optical fibers

Paul Blazkiewicz, Wei Xu, Danny Wong, John Canning, Mattias Åsland, and Graham Town
Opt. Lett. 25(4) 200-202 (2000)