A compact on-chip reconfigurable multichannel amplitude equalizer based on cascaded elliptical microrings is proposed and demonstrated experimentally. With the optimized structure of the elliptical microring with adiabatically varied radii/widths, the average excess loss for each channel in the initialized state is measured to be less than 0.5 dB, while the attenuation dynamic range can be over 20 dB. Flexible tunability through the overlapping of the resonance peaks of adjacent wavelength-channels enables even higher attenuation dynamic ranges up to 50 dB. Leveraging the thermo-optic effect and fine wavelength-tuning linearity, precise tuning of the resonance peak can be implemented, enabling dynamic power equalization of each wavelength-channel in wavelength-division-multiplexing (WDM) systems and optical frequency combs. The proposed architecture exhibits excellent scalability, which can facilitate the development of long-haul optical transport networks and high-capacity neuromorphic computing systems, while improving the overall performance of optical signals in WDM-related systems.

中文翻译：

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基于级联硅光子微环的可重构多通道幅度均衡器

提出了一种基于级联椭圆微环的紧凑型片上可重构多通道幅度均衡器，并进行了实验验证。通过优化的椭圆微环结构和绝热变化的半径/宽度，测得每个通道在初始化状态下的平均超额损耗小于 0.5 dB，而衰减动态范围可超过 20 dB。通过重叠相邻波长通道的共振峰实现灵活的可调谐性，可实现高达 50 dB 的更高衰减动态范围。利用热光效应和精细的波长调谐线性度，可以实现谐振峰的精确调谐，从而实现波分复用 (WDM) 系统和光频率梳中每个波长通道的动态功率均衡。