Abstract

We report the observation of light-enhanced electro-optic spectral tuning in annealed proton-exchanged, asymmetric domain-duty-cycle periodically poled lithium niobate (PPLN) channel waveguides for second-harmonic generation. The spectral tuning rate was increased rapidly from 0.07nm/(kV/mm) to a saturated value of 0.32nm/(kV/mm) in a 30%/70% domain-duty-cycle PPLN waveguide when the fundamental pump power near 1534nm was increased from 0.6 to 46mW. The second-harmonic laser power at 767nm was identified to be the source enhancing the spectral tuning.

© 2006 Optical Society of America

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