Frequency stabilization of an Er-doped fiber laser with a collinear 2 f -to-3 f self-referencing interferometer

We report the stabilization of the carrier-envelope offset (CEO) frequency of an Er-doped fiber laser with a collinear 2f-to-3f self-referencing interferometer. The interferometer is implemented by a dual-pitch periodically poled lithium niobate ridge waveguide with two different quasi-phase matchin...

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Bibliographic Details
Published in:Applied physics letters 2015-06, Vol.106 (23)
Main Authors: Hitachi, K., Ishizawa, A., Tadanaga, O., Nishikawa, T., Mashiko, H., Sogawa, T., Gotoh, H.
Format: Article
Language:English
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Summary:We report the stabilization of the carrier-envelope offset (CEO) frequency of an Er-doped fiber laser with a collinear 2f-to-3f self-referencing interferometer. The interferometer is implemented by a dual-pitch periodically poled lithium niobate ridge waveguide with two different quasi-phase matching pitch sizes. We obtain a 52-dB signal-to-noise ratio in the 100-kHz resolution bandwidth of a heterodyne beat signal, which is sufficient for frequency stabilization. We also demonstrate that the collinear geometry is robust against environmental perturbation by comparing in-loop and out-of-loop Allan deviations when the in-loop CEO frequency is stabilized with a phase-locked loop circuit.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4922553