Optical Amplification-Free High Baudrate Links for Intra-Data Center Communications
Journal of Lightwave Technology 2023
Oskars Ozoliņš, Joharifar Mahdieh, Toms Salgals, Louchet Hadrien, Richard Schatz, Markus Gruen, Thomas Dippon, Benjamin Kruger, Fabio Pitalla, Di Che, Yasuhiro MAtsui, Yuchuan Fan, Aleksejs Udalcovs, Urban Westergren, Lu Zhang, Xianbin Yu, Sandis Spolītis, Vjačeslavs Bobrovs, Sergei Popov, Xiaodan Pang

The enormous traffic growth sets a stringent requirement to upgrade short-reach optical links to 1.6 TbE capacity in an economically viable way. The power consumption and latency in these links should be as low as possible, especially for high-speed computing. This is possible to achieve using high baudrate on-off keying links thanks to a better noise tolerance and a relaxed requirement on linearity for electronics and photonics. In this regard, we demonstrate a 200 Gbaud on-off keying link without any optical amplification using an externally modulated laser with 3.3 dBm of modulated output power operating at 1541.25 nm wavelength. We achieve transmission over 200 meters of single-mode fiber with performance below 6.25% overhead hard-decision forward error correction threshold for each baudrate and all selection of modulation formats. We also show 108 Gbaud on-off keying link with superior performance without decision feedback equalizer up to 400 meters of single-mode fiber. In addition, we benchmark the short-reach optical link with 112 Gbaud four-level pulse amplitude modulation and 100 Gbaud six-level pulse amplitude modulation. For 108 Gbaud on-off keying and 112 Gbaud four-level pulse amplitude modulation, we can achieve an even lower bit error rate.

Atslēgas vārdi
Bit error rate | Modulation | On-off keying | Optical feedback | Optical fiber communication | optical interconnects | Optical modulation | Optical pulses | pulse amplitude modulation | Stimulated emission

Ozoliņš, O., Mahdieh, J., Salgals, T., Hadrien, L., Schatz, R., Gruen, M., Dippon, T., Kruger, B., Pitalla, F., Che, D., MAtsui, Y., Fan, Y., Udalcovs, A., Westergren, U., Zhang, L., Yu, X., Spolītis, S., Bobrovs, V., Popov, S., Pang, X. Optical Amplification-Free High Baudrate Links for Intra-Data Center Communications. Journal of Lightwave Technology, 2023, Vol. 41, No. 4, 1200.-1206.lpp. ISSN 0733-8724. e-ISSN 1558-2213. Pieejams: doi:10.1109/JLT.2022.3214722

Publikācijas valoda
English (en)
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