Integrated optics has weak ultraviolet and near-ultraviolet (NUV) light conversion due to its strong material dispersion and large propagation losses. To reach this spectral range, we use non-centrosymmetric waveguides that convert near-infrared (NIR) supercontinuum light into broadband NUV light. We measure a 280 THz span that reaches the upper frequency of 851 THz (352 nm) in a 14-mm long rib waveguide of lithium niobate-on-insulator, with an engineered dispersion for supercontinuum generation in the NIR range. The results on broadband NUV signals promote integrated optics for spectroscopy and fluorescence applications such as atomic clocks and chemical sensors.

中文翻译：

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带有100 pJ以下脉冲的绝缘子上铌酸锂波导中产生280 THz的近紫外光

集成光学器件具有较强的材料分散性和较大的传播损耗，因此紫外线和近紫外（NUV）的光转换较弱。为了达到此光谱范围，我们使用非中心对称波导将近红外（NIR）超连续谱光转换为宽带NUV光。我们在绝缘体上含铌酸锂的14毫米长肋形波导中测量了一个280 THz跨度，该频率达到了851 THz（352 nm）的上限频率，并在NIR范围内设计了能产生超连续谱的色散。宽带NUV信号的结果促进了用于光谱学和荧光应用的集成光学系统，例如原子钟和化学传感器。