Low-voltage tunable second-harmonic generation in an x-cut periodically poled lithium niobate waveguide

We report a new method of tuning the second-harmonic signal generated in a periodically poled lithium niobate (PPLN) waveguide. This technique relies on the recent progress in the fabrication of PPLNs on x-cut substrates along with periodical coplanar electrodes to reduce the tuning voltage while pr...

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Bibliographic Details
Published in:Optics letters 2007-05, Vol.32 (9), p.1108-1110
Main Authors: GENEREUX, F, BALDENBERGER, G, BOURLIAGUET, B, VALLEE, R
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Integrated optics. Optical fibers and wave guides
Nonlinear optics
Optical and optoelectronic circuits
Optics
Physics
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Summary:We report a new method of tuning the second-harmonic signal generated in a periodically poled lithium niobate (PPLN) waveguide. This technique relies on the recent progress in the fabrication of PPLNs on x-cut substrates along with periodical coplanar electrodes to reduce the tuning voltage while preserving the conversion efficiency. Our scheme exploits a type I interaction implemented in a titanium waveguide to impede cancellation of the electro-optical coefficients and to minimize the group-velocity mismatch between the first- and second-harmonic modes. The tuning range covers 58 nm with an applied voltage of +/-150 V.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.32.001108