Generation of two-cycle pulses and octave-spanning frequency combs in a dispersion-flattened micro-resonator.
Generation of two-cycle pulses and octave-spanning frequency combs in a dispersion-flattened micro-resonator.
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DOI：
10.1364/ol.38.005122
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发表时间：
2013-12
期刊：
影响因子：
3.6
通讯作者：
Lin Zhang;C. Bao;Vivek Singh;Jianwei Mu;Changxi Yang;A. Agarwal;L. Kimerling;J. Michel
中科院分区：
文献类型：
--
作者：
Lin Zhang;C. Bao;Vivek Singh;Jianwei Mu;Changxi Yang;A. Agarwal;L. Kimerling;J. Michel
我们证明了在色散平坦微环谐振器中可以产生具有改善梳状线光谱平坦性的倍频程跨克尔频率梳。该谐振器由条/缝混合波导构成，在从近红外到中红外相隔一个八度的两个零色散波长之间表现出平坦而低的反常色散。这种平坦的色散分布允许产生锁模频率梳，使用相对较低的泵浦功率在芯片上获得与倍频程跨越的梳状带宽相关联的两周期腔孤子。文中还考虑了光学损耗和耦合系数的波长依赖性，从而考虑了波长相关的Q因子。
We show that octave-spanning Kerr frequency combs with improved spectral flatness of comb lines can be generated in dispersion-flattened microring resonators. The resonator is formed by a strip/slot hybrid waveguide, exhibiting a flat and low anomalous dispersion between two zero-dispersion wavelengths that are separated by one octave from near-infrared to mid-infrared. Such flattened dispersion profiles allow for the generation of mode-locked frequency combs, using relatively low pump power to obtain two-cycle cavity solitons on a chip, associated with the octave-spanning comb bandwidth. The wavelength dependence of the optical loss and of the coupling coefficient and thus wavelength dependent Q-factor are also considered.