Lu Juanjuan, Liu Xianwen, Bruch Alexander W, Zhang Liang, Wang Junxi, Yan Jianchang, Tang Hong X
Opt Lett. 2020 Aug 15;45(16):4499-4502. doi: 10.1364/OL.398257.
We demonstrate ultrabroadband supercontinuum generation from ultraviolet to mid-infrared wavelengths in single-crystalline aluminum nitride waveguides. Tunable dispersive waves are observed at the mid-infrared regime by precisely controlling the waveguide widths. In addition, ultraviolet light is generated through cascaded second-harmonic generation in the modal phase-matched waveguides. Numerical simulation indicates a high degree of coherence of the generated spectrum at around the telecom pump and two dispersive waves. Our results establish a reliable path for multiple octave supercontinuum comb generation in single-crystalline aluminum nitride to enable applications including precision frequency metrology and spectroscopy.
我们展示了在单晶氮化铝波导中从紫外到中红外波长的超宽带超连续谱产生。通过精确控制波导宽度，在中红外波段观察到了可调谐的色散波。此外，在模式相位匹配波导中通过级联二次谐波产生了紫外光。数值模拟表明，在电信泵浦和两个色散波附近，所产生的光谱具有高度的相干性。我们的结果为在单晶氮化铝中产生多个倍频程超连续谱梳建立了一条可靠的途径，以实现包括精密频率计量和光谱学在内的应用。
