Frequency stabilization of an Er-doped fiber laser with a collinear 2f-to-3f 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
Subjects:
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Doped fibers
DOPED MATERIALS
ERBIUM
Fiber lasers
Frequency stabilization
INTERFEROMETERS
KHZ RANGE 01-100
LASERS
LITHIUM
Lithium niobates
NIOBATES
Noise levels
OPTICAL FIBERS
Perturbation
Phase locked loops
Phase matching
SIGNAL-TO-NOISE RATIO
WAVEGUIDES
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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