Tunable polarization mode conversion using thin-film lithium niobate ridge waveguide

Lithium niobate on insulator (LNOI) waveguides, as an emerging technology, have proven to offer a promising platform for integrated optics, due to their strong optical confinement comparable to silicon on insulator (SOI) waveguides, while possessing the versatile properties of lithium niobate, such...

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Veröffentlicht in:Optics express 2021-06, Vol.29 (12), p.18565-18571
Hauptverfasser: Yang, Guang, Sergienko, Alexander V., Ndao, Abdoulaye
Format: Artikel
Sprache:eng
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Zusammenfassung:Lithium niobate on insulator (LNOI) waveguides, as an emerging technology, have proven to offer a promising platform for integrated optics, due to their strong optical confinement comparable to silicon on insulator (SOI) waveguides, while possessing the versatile properties of lithium niobate, such as high electro-optic coefficients. In this paper, we show that mode hybridization, a phenomenon widely found in vertically asymmetric waveguides, can be efficiently modulated in an LNOI ridge waveguide by electro-optic effect, leading to a polarization mode converter with 97% efficiency. Moreover, the proposed device does not require tapering or periodic poling, thereby greatly simplifying the fabrication process. It can also be actively switched by external fields. Such a platform facilitates technological progress of photonics circuits and sensors.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.426672