Electrode optimization for efficient resonant electro-optic frequency microcombs

Resonant electro-optic comb generation in thin-film lithium niobate microrings is a powerful method for achieving large-bandwidth electro-optic combs with a small footprint. While significant progress has been made in optimizing the optical resonator, the on-chip microwave waveguide has been less explored. Here, we develop a generic analytical model that predicts the phase shift acquired by the optical wave, taking into account possible microwave losses, impedance and velocity mismatches, and different injection points. We apply this model to determine the optimal electrode length for a traveling-wave configuration and two standing-wave configurations, with microwave driving frequencies at different multiples of the optical free spectral range. We experimentally validate the model by measuring several devices fabricated at the chip and wafer levels.

Schlagwörter

Fachgebiet (DDC)

620 - Ingenieurwissenschaften und Maschinenbau

Projekt

Veranstaltung

Startdatum der Ausstellung

Enddatum der Ausstellung

Startdatum der Konferenz

Enddatum der Konferenz

Datum der letzten Prüfung

ISBN

ISSN

2378-0967

Sprache

Englisch

Während FHNW Zugehörigkeit erstellt

Ja

Zukunftsfelder FHNW

Publikationsstatus

Veröffentlicht

Begutachtung

Peer-Review der ganzen Publikation

Open Access-Status

Gold

Lizenz

Zitation

Häusler, S., Volpini, A., Finco, G., Li, G., Caër, C., Holzer, J. S., Sattari, H., Zarebidaki, H., Prieto, I., Lecomte, S., Grange, R., Wildfeuer, C., & Grassani, R. (2026). Electrode optimization for efficient resonant electro-optic frequency microcombs. APL Photonics, 11(4). https://doi.org/10.1063/5.0312190

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