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arXiv · 1901.11101

Coherent two-octave-spanning supercontinuum generation in lithium-niobate waveguides

Mengjie Yu·Boris Desiatov·Yoshitomo Okawachi·Alexander L. Gaeta·Marko Loncar
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Abstract

We demonstrate coherent supercontinuum generation (SCG) in a monolithically integrated lithium-niobate waveguide, under the presence of second- and third-order nonlinear effects. We achieve more than two octaves of optical bandwidth in a 0.5-cm-long waveguide with 100-picojoule-level pulses. Dispersion engineering of the waveguide allows for spectral overlap between the SCG and the second harmonic which enables direct detection of the carrier-envelope offset frequency fCEO using a single waveguide. We measure the fCEO of our femtosecond pump source with a 30-dB signal-to-noise ratio.

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Mengjie Yu, Boris Desiatov, Yoshitomo Okawachi, Alexander L. Gaeta, Marko Loncar. 2019-01-30. Coherent two-octave-spanning supercontinuum generation in lithium-niobate waveguides. https://doi.org/10.1364/ol.44.001222

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