Ultra-broadband mid-infrared generation in dispersion-engineered thin-film lithium niobate
Abstract
Thin-film lithium niobate (TFLN) is an emerging platform for compact, low-power nonlinear-optical devices, and has been used extensively for near-infrared frequency conversion. Recent work has extended these devices to mid-infrared wavelengths, where broadly tunable sources may be used for chemical sensing. To this end, we demonstrate efficient and broadband difference frequency generation between a fixed 1-micron pump and a tunable telecom source in uniformly-poled TFLN-on-sapphire by harnessing the dispersion-engineering available in tightly-confining waveguides. We show a simultaneous 1-2 order-of-magnitude improvement in conversion efficiency and ~5-fold enhancement of operating bandwidth for mid-infrared generation when compared to conventional lithium niobate waveguides. We also examine the effects of mid-infrared loss from surface-adsorbed water on the performance of these devices.
Keywords
Cite
@article{arxiv.2205.08763,
title = {Ultra-broadband mid-infrared generation in dispersion-engineered thin-film lithium niobate},
author = {Jatadhari Mishra and Marc Jankowski and Alexander Y. Hwang and Hubert S. Stokowski and Timothy P. McKenna and Carsten Langrock and Edwin Ng and David Heydari and Hideo Mabuchi and Amir H. Safavi-Naeini and M . M. Fejer},
journal= {arXiv preprint arXiv:2205.08763},
year = {2022}
}
Comments
5 pages, 4 figures