Abstract

The growing demand for broadband access networks keeps motivating research for higher capacity in both wired and wireless access networks. Recently, the recommendation for 50G-PON with conventional NRZ modulation has been published. Bidirectional point-to-point access networks, also known as BiDi, used in mobile xHaul, are standardized up to 50 Gb/s with PAM-4 as modulation format. The evolution in view of a next generation 6G wireless encourages research towards higher bitrates for fronthaul systems. Hence, there is interest for having single channel BiDi links with a bitrate of at least 100 Gb/s. In this paper we experimentally evaluate four possible IMDD transceiver schemes suitable for optical access applications in the O-Band that can cover BiDi link losses up to a bitrate of 100 Gb/s using PAM-4. We employ an EML with either a 25G-based APD or an optically preamplified p-i-n photodiode (PD) with low-complexity FFE equalization and achieve a real-time power budget of 23.7 dB, just above BiDi B- loss class. By adding an optical booster, we demonstrate up to 34 dB power budget, exceeding with enough margin the highest BiDi class B loss of 25 dB.

Demonstration of symmetrical 50-Gb/s TDM-PON in O-band supporting over 33-dB link budget with OLT-side amplification

Chengcheng Li, Jian Chen, Zhengxuan Li, Yingxiong Song, Yingchun Li, and Qianwu Zhang
Opt. Express 27(13) 18343-18350 (2019)

Achieving high budget classes in the downstream link of 50G-PON

Ricardo Rosales, Ivan Cano, Derek Nesset, Romain Brenot, Natalia Dubrovina, Elena Durán-Valdeiglesias, and Helene Debregeas
J. Opt. Commun. Netw. 13(8) D13-D21 (2021)

100 Gb/s (4 × 25 Gb/s) real-time coherent UDWDM-PON with a large power budget

Ming Luo, Danyu Wu, Weizhong Li, Tao Zeng, Lei Zhou, Lingheng Meng, Xiang Li, and Shaohua Yu
J. Opt. Commun. Netw. 12(2) A204-A213 (2020)

Real-time validation of downstream 50G/25G and 50G/100G flexible rate PON based on Miller encoding, NRZ, and PAM4 modulation

Doutje van Veen and Vincent Houtsma
J. Opt. Commun. Netw. 15(8) C147-C154 (2023)

Experimental demonstration of flexible information rate PON beyond 100 Gb/s with probabilistic and geometric shaping

Noriaki Kaneda, Rui Zhang, Yannick Lefevre, Amitkumar Mahadevan, Doutje van Veen, and Vincent Houtsma
J. Opt. Commun. Netw. 14(1) A23-A30 (2022)