In this article, for the first time, we propose a photonic-aided digital-to-analog converter (PA-DAC) to break through transmitter-side bandwidth limitation in intensity modulation and direct detection (IM-DD) systems. By using this method, bandwidth of receiver-side devices can be fully utilized, and nonlinear distortions in high-data-rate electrical signals are avoided. Experimental results show that, with only linear equalization, 120 GBaud PAM-4 and PAM-6 signals have been successfully generated and detected with bite error ratios (BERs) below 6.25%-OH HD-FEC and 20%-OH SD-FEC limits, respectively.

中文翻译：

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120 GBaud PAM-4/PAM-6 生成和检测通过光子辅助数模转换器和线性均衡

在本文中，我们首次提出了一种光子辅助数模转换器 (PA-DAC)，以突破强度调制和直接检测 (IM-DD) 系统中的发射机侧带宽限制。使用这种方法可以充分利用接收端设备的带宽，避免高数据速率电信号中的非线性失真。实验结果表明，仅通过线性均衡，120 GBaud PAM-4 和 PAM-6 信号已成功生成和检测，误码率 (BER) 低于 6.25%-OH HD-FEC 和 20%-OH SD-FEC 限制， 分别。