Weng Haizhong, Liu Jia, Afridi Adnan Ali, Li Jing, Dai Jiangnan, Ma Xiang, Zhang Yi, Lu Qiaoyin, Donegan John F, Guo Weihua
Opt Lett. 2021 Feb 1;46(3):540-543. doi: 10.1364/OL.416460.
Octave-spanning optical frequency combs (OFCs) are essential for various applications, such as precision metrology and astrophysical spectrometer calibration. In this Letter, we demonstrate, for the first time to our knowledge, the generation of octave-spanning Kerr frequency combs ranging from 1150 to 2400 nm in aluminum nitride (AlN) microring resonators, by pumping the modes at 250 mW on-chip power. By simply adjusting the pump detuning, we observe the transition and coexistence of Kerr OFC and stimulated Raman scattering. For the mode in the same device, a broadband Raman-assisted frequency comb is demonstrated by adjusting the pump power and tuning. These results indicate a crucial development for the fundamentals of nonlinear dynamics and comb applications in AlN.
倍频程光学频率梳（OFC）对于各种应用至关重要，例如精密计量和天体物理光谱仪校准。在本信函中，据我们所知，首次展示了在氮化铝（AlN）微环谐振器中通过以250 mW的片上功率泵浦模式产生范围从1150至2400 nm的倍频程克尔频率梳。通过简单地调整泵浦失谐，我们观察到克尔OFC与受激拉曼散射的转变和共存。对于同一器件中的模式，通过调整泵浦功率和调谐展示了宽带拉曼辅助频率梳。这些结果表明了AlN中非线性动力学基础和频率梳应用的关键进展。
