Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.
Opt Lett. 2013 Aug 1;38(15):2810-3. doi: 10.1364/OL.38.002810.
Aluminum nitride (AlN) is an appealing nonlinear optical material for on-chip wavelength conversion. Here we report optical frequency comb generation from high-quality-factor AlN microring resonators integrated on silicon substrates. By engineering the waveguide structure to achieve near-zero dispersion at telecommunication wavelengths and optimizing the phase matching for four-wave mixing, frequency combs are generated with a single-wavelength continuous-wave pump laser. Further, the Kerr coefficient (n₂) of AlN is extracted from our experimental results.
氮化铝（AlN）是一种很有吸引力的用于片上波长转换的非线性光学材料。在此，我们报告了在硅衬底上集成的高品质因子氮化铝微环谐振器中产生光频梳的情况。通过对波导结构进行设计，使其在电信波长处实现近零色散，并优化四波混频的相位匹配，我们用单波长连续波泵浦激光产生了光频梳。此外，我们还从实验结果中提取了氮化铝的克尔系数（n₂）。
