基于级联相位调制器和光衰减器的光频梳产生研究

提出了一种基于级联相位调制器和光衰减器的光 频梳产生方案,建立了方案的理论模型并进行了 系统验证,研究了射频(radio frequency,RF) 信号幅度和光衰减器衰减系数对光频梳平坦度的影响。结果表明数值 计算与实验 结果一致性较好,通过调整RF驱动信号幅度和光衰减器衰减系数可产生梳线数量为15条、平坦度为 0.8 dB,边模抑制比(side-mode suppression ratio,SMSR) 为5.05 dB的光频梳。方 案中引入滤波器后,在梳线数量保持不变的前 提下,其平坦度和SMSR可分别提高62.5%和61.4%。

Research on optical frequency comb generation based on cascaded phase modulator and optical attenuator

An optical frequency comb generation scheme based on cascaded phase mo dulator and optical attenuator is proposed.The theoretical model of the scheme is establish ed and verified systematically.Finally,the effects of radio frequency (RF) signal amplitude and optical attenuator attenuation coefficient on the flatness of optical frequency comb are studied.T he results show that the numerical calculation is in good agreement with the experimental results.By adj usting the amplitude of RF drive signal and the attenuation coefficient of optical attenuator,a high -performance optical frequency comb with 15 comb lines,0.8 dB flatness and 5.05 dB side-mode suppres sion ratio (SMSR) can be generated.After the filter is introduced into the scheme,the flatness and SMSR can be increased by 62.5% and 61.4% respectively on the premise that the number of comb lines remains unchanged.