论文信息 - Digitally Enhanced DAC: Low-Resolution Digital Pre-Compensation for High Speed Optical Links

Digitally Enhanced DAC: Low-Resolution Digital Pre-Compensation for High Speed Optical Links

A novel algorithm is proposed to overcome bandwidth limitation using low-resolution DACs. We demonstrate electrical back-to-back 32Gbaud QAM-64 over 11GHz and optical 32Gbaud QAM-4 over 5GHz using 4 bits and 2.6 bits DACs respectively.

[1] Maxim Kuschnerov,et al. Digital Compensation of Bandwidth Limitations for High-Speed DACs and ADCs , 2016, Journal of Lightwave Technology.

[2] Jerry D. Gibson,et al. Digital coding of waveforms: Principles and applications to speech and video , 1985, Proceedings of the IEEE.

[3] Bernard Widrow,et al. Quantization Noise: A Few Properties of Selected Distributions , 2008 .

[4] S. Savory. Digital Coherent Optical Receivers: Algorithms and Subsystems , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[5] Danish Rafique,et al. Digital Preemphasis in Optical Communication Systems: On the DAC Requirements for Terabit Transmission Applications , 2014, Journal of Lightwave Technology.