Electro-optically modulated polarization mode conversion in lithium niobate ridge waveguides
Abstract
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 photonic circuits and sensors.
Cite
@article{arxiv.2103.03365,
title = {Electro-optically modulated polarization mode conversion in lithium niobate ridge waveguides},
author = {Guang Yang and Alexander V. Sergienko and Abdoulaye Ndao},
journal= {arXiv preprint arXiv:2103.03365},
year = {2021}
}