Nanostructuring of LNOI for efficient edge coupling
Applied Physics
2019-06-26 v1 Optics
Quantum Physics
Abstract
We present the design, fabrication and characterization of LNOI fiber-to-chip inverse tapers for efficient edge coupling. The etching characteristics of various LNOI crystal cuts are investigated for the realization of butt-coupling devices. We experimentally demonstrate that the crystal cut limits the performance of mode matching tapers. We report a butt-coupling loss of 2.5 dB/facet and 6 dB/facet by implementing 200 nm tip mode matching tapers in -cut LNOI and -cut MgO:LNOI waveguides with low propagation loss. We anticipate that these results will provide insight into the nanostructuring of LNOI and into the further development of efficient butt-coupling in this platform.
Cite
@article{arxiv.1902.07394,
title = {Nanostructuring of LNOI for efficient edge coupling},
author = {Inna Krasnokutska and Jean-Luc J. Tambasco and Alberto Peruzzo},
journal= {arXiv preprint arXiv:1902.07394},
year = {2019}
}