K. Schaarschmidt, H. Xuan, J. Kobelke, M. Chemnitz, I. Hartl, and M.A. Schmidt, "Long-term stable supercontinuum generation and watt-level transmission in liquid-core optical fibers," Opt. Lett. 44, 2236-2239 (2019).
Due to their unique properties such as transparency, tunability, nonlinearity, and dispersion flexibility, liquid-core fibers represent an important approach for future coherent mid-infrared light sources. However, the damage thresholds of these fibers are largely unexplored. Here we report on the generation of soliton-based supercontinua in carbon disulfide (CS2) liquid-core fibers at average power levels as high as 0.5 W operating stably for a long term (>70 h) without any kind of degradation or damage. Additionally, we also show stable high-power pulse transmission through liquid-core fibers exceeding 1 W of output average power for both CS2 and tetrachloroethylene as core materials.