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首页> 外文期刊>Optics Letters >Comparison of the impact of nonlinearity in a p-i-n and an MUTC photodetector on electro-optic frequency combs
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Comparison of the impact of nonlinearity in a p-i-n and an MUTC photodetector on electro-optic frequency combs

机译：电视频磁体上P-I-N和MUTC光电探测器中非线性的影响的比较

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摘要

We calculate the impact of nonlinearity in both a p-i-n photodetector (PD) and a modified uni-traveling carrier (MUTC) PD on an RF-modulated frequency comb generated using 100-fs optical pulses with a 50-MHz repetition rate. We take into account bleaching (nonlinear saturation) that is due to the high peak-to-average-power ratio and contributes to the device nonlinearity. Nonlinear impairment of an RF-modulated continuous wave is typically characterized by the second- and third-order intermodulation distortion products (IMD2 and IMD3). In contrast, an RF-modulated frequency comb must be characterized by a distinct IMD2(n) and IMD3(n) for each comb line n. We calculate IMD2(n) and IMD3(n) in both p-i-n and MUTC PDs and compare the results. We also calculate the ratio of the IMD2(n) power and the IMD3(n) power to the fundamental power S-in in both p-i-n and MUTC PDs. We find that nonlinear distortion has a greater impact at high frequencies in the MUTC PD than in the p-i-n PD. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
机译：我们计算了p-i-n光电探测器（PD）和改进的单移动载波（MUTC）PD中的非线性对使用50MHz重复率的100fs光脉冲产生的射频调制频率梳的影响。我们考虑了漂白（非线性饱和），这是由于高峰值平均功率比，并有助于设备的非线性。射频调制连续波的非线性损伤通常以二阶和三阶互调失真产物（IMD2和IMD3）为特征。相比之下，射频调制频率梳的特征必须是每个梳线n具有不同的IMD2（n）和IMD3（n）。我们计算p-i-n和MUTC-PDs中的IMD2（n）和IMD3（n），并比较结果。我们还计算了p-i-n和MUTC-PDs中IMD2（n）功率和IMD3（n）功率与基本功率S-in的比值。我们发现，MUTC PD中的非线性失真对高频的影响比p-i-n PD中的影响更大。（c）OSA开放获取出版协议条款下的美国2021光学学会

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