Tunable photo-induced second-harmonic generation in a mode-engineered silicon nitride microresonator

All-optical poling enables reconfigurable and efficient quasi-phase-matching for second-order parametric frequency conversion in silicon nitride integrated photonics. Here, we report broadly tunable milliwatt-level second-harmonic generation in a small free spectral range silicon nitride microresona...

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Bibliographic Details
Published inOptics express Vol. 31; no. 9; pp. 14442 - 14453
Main Authors Nitiss, Edgars, Zabelich, Boris, Hu, Jianqi, Stroganov, Anton, Brés, Camille-Sophie
Format Journal Article
LanguageEnglish
Published United States 24.04.2023
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Summary:All-optical poling enables reconfigurable and efficient quasi-phase-matching for second-order parametric frequency conversion in silicon nitride integrated photonics. Here, we report broadly tunable milliwatt-level second-harmonic generation in a small free spectral range silicon nitride microresonator, where the pump and its second-harmonic are both always on the fundamental mode. By carefully engineering the light coupling region between the bus and microresonator, we simultaneously achieve critical coupling of the pump as well as efficient extraction of second-harmonic light from the cavity. Thermal tuning of second-harmonic generation is demonstrated with an integrated heater in a frequency grid of 47 GHz over a 10 nm band.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.487525