Three-Octave Supercontinuum Generation Spanning from Ultraviolet in Lithium Tantalate Waveguides
Optics
2025-12-25 v2
Abstract
We demonstrate, for the first time, supercontinuum generation spanning more than three octaves in dispersion-engineered thin-film lithium tantalate (TFLT) waveguides. Pumped by a femtosecond laser at 1560 nm, the waveguides yield a spectrum from 240 nm in the ultraviolet to beyond 2400 nm in the near-infrared. The spectral evolution is mapped from low-power harmonic generation (second- and third-harmonic) to a high-power continuum driven by soliton fission and dispersive wave emission. This first demonstration of ultrabroadband nonlinear optics in TFLT establishes it as a competitive, low-loss platform for integrated photonics, with significant potential for applications in frequency metrology and on-chip spectroscopy.
Cite
@article{arxiv.2512.16350,
title = {Three-Octave Supercontinuum Generation Spanning from Ultraviolet in Lithium Tantalate Waveguides},
author = {Lingfang Wang and Tianyou Tang and Huizong Zhu and Juanjuan Lu},
journal= {arXiv preprint arXiv:2512.16350},
year = {2025}
}