260-GBaud Single-Wavelength Coherent Transmission Over 100-km SSMF Based on Novel Arbitrary Waveform Generator and Thin-Film Niobate I/Q Modulator
Sylvain Almonacil, H. Mardoyan, F. Jorge, Fabio Pittalà, Mengyue Xu, Benjamin Krueger, F. Blache, B. Duval, Lifeng Chen, Yangjie Yan, Xiaoyan Ye, Amirhossein Ghazisaeidi, Sina Rimpf, Yuntao Zhu, Jaw‐Yuan Wang, M. Goix, Ziyang Hu, Margaux Duthoit, Markus Gruen, Xinlun Cai, Jérémie Renaudier
Abstract
In this paper, we demonstrate up to 260-GBaud single-wavelength coherent transmission by employing an optical transmitter based on two wide-bandwidth devices: a novel 260-GS/s arbitrary waveform generator with a 10-dB bandwidth of 90-GHz and a thin-film Lithium Niobate I/Q modulator with a 3-dB bandwidth of 110-GHz. We first assess the performance of our high symbol rate transmitter for generating spectrally efficient Nyquist multilevel modulation format signals at symbol rates up to 210-GBaud with >1.4-Tbps achievable information rates and by using linear digital signal processing only. We achieve up to 1.84-Tbps at 185-GBaud using PCS-64QAM, highlighting the linear behavior of our transmitter for high symbol rate Nyquist signaling. We then switch to dual-polarization QPSK coherent transmission and further increase the symbol rate up to 260-GBaud. Without using nonlinear digital-signal-processing nor advanced inter-symbol-interference mitigation techniques, we successfully transmit 260-GBaud QPSK at 800-Gbps net rate over 100-km of standard single mode fiber.