We propose and experimentally demonstrate a photonic integrated circuit (PIC) that operates as an optical equalizer (OE) with multi-rate and multi-channel capability. The OE has the structure of a 3-tap direct form finite impulse response (FIR) filter and is based on the use of micro-ring resonators (MRRs) for the tuning of its delay lines. The PIC is fabricated on TriPleX platform and has 17 reconfigurable elements in total including nine MRRs, five optical couplers and three standalone phase shifters. Using this OE in an on-off keying system with bandwidth limitations we achieve an eye-diagram opening improvement more than 14 dB working with signals at 4.67 and 5.84 Gbaud both in single- and dual-channel operation. Extension to higher modulation formats is direct. Extension to higher symbol rates is also possible via the use of smaller MRRs.

中文翻译：

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基于光子集成的多速率多通道光均衡器

我们提出并通过实验证明了一种光子集成电路 (PIC)，它可用作具有多速率和多通道功能的光均衡器 (OE)。OE 具有 3 抽头直接形式有限脉冲响应 (FIR) 滤波器的结构，并基于使用微环谐振器 (MRR) 对其延迟线进行调谐。PIC 在 TriPleX 平台上制造，共有 17 个可重构元件，包括 9 个 MRR、5 个光耦合器和三个独立移相器。在具有带宽限制的开关键控系统中使用此 OE，我们在单通道和双通道操作中使用 4.67 和 5.84 Gbaud 的信号实现了超过 14 dB 的眼图开度改进。扩展到更高的调制格式是直接的。通过使用较小的 MRR，也可以扩展到更高的符号率。