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Second-harmonic generation in a high-index doped silica micro-ring resonator

Yuhua Li, Shao Hao Wang, Wai Lok Ho, Xiaotian Zhu, Xiang Wang, Roy R. Davidson, Brent E. Little, Rui-Pin Chen, and Sai Tak Chu

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Abstract

We report the first, to the best of our knowledge, observation of second-harmonic generation (SHG) in a high-index doped silica micro-ring resonator, due to the symmetry-breaking-induced χ(2) at the core and cladding interface of the waveguide. The generated SH power is shown to have quadratic dependence on the in-cavity power of the fundamental pump at around 1550 nm. The pumping wavelength sweep method is adopted to fulfill the phase-matching condition for maximum conversion efficiency of SHG. This work offers a new approach to generate a visible source for the visible-light integrated optical platform from infrared–visible light conversion.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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