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Dual Frequency Combs at 3.4 µm with Subhertz Residual Linewidths

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Abstract

Two coherent 1.5 µm frequency combs are transferred to 3.4 µm by difference-frequency generation with a 1064 nm cw laser. From a multi-heterodyne measurement, the residual linewidth between the comb teeth is resolution-limited at 200 mHz.

© 2010 Optical Society of America

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