Dai Jian, Xu Xingyuan, Wu Zhongle, Dai Yitang, Yin Feifei, Zhou Yue, Li Jianqiang, Xu Kun
Opt Express. 2015 Nov 16;23(23):30014-9. doi: 10.1364/OE.23.030014.
An ultraflat self-oscillating optical frequency comb generator based on an optoelectronic oscillator employing cascaded modulators was proposed and experimentally demonstrated. By incorporating the optoelectronic oscillation loop with cascaded modulators into the optical frequency comb generator, 11 ultraflat comb lines would be generated, and the frequency spacing is equal to the oscillation frequency of the OEO. 10 and 12GHz optical frequency combs are demonstrated with the spectral power variation below 0.82dB and 0.93dB respectively. The corresponding spectral pure microwave source are also generated and evaluated. The corresponding single-sideband phase noise are as low as -122dBc/Hz and -115 dBc/Hz at 10 kHz offset frequency.
提出并通过实验证明了一种基于采用级联调制器的光电振荡器的超平坦自振荡光频梳发生器。通过将带有级联调制器的光电振荡回路并入光频梳发生器中，可产生11条超平坦梳状谱线，且频率间隔等于光电振荡器的振荡频率。分别展示了频谱功率变化低于0.82dB和0.93dB的10GHz和12GHz光频梳。还生成并评估了相应的频谱纯微波源。在10kHz偏移频率下，相应的单边带相位噪声低至-122dBc/Hz和-115dBc/Hz。
