Bidirectional WDM Multi-Nodes Analog Radio-Over-Fiber Mobile Fronthaul Link Enhanced by Photonic Integrated Devices

• Published in: IEEE Photonics Journal
• Main Authors: Changjian Xie, Wenlin Bai, Peixuan Li, Yongtao Du, Ningyuan Zhong, Wei Pan, Xihua Zou
• Format: Article in Journal/Newspaper
• Language: English
• Published: IEEE 2022
• Subjects: Photonic integrated devices; array waveguide grating (AWG); directly modulated laser; analog radio-over-fiber; mobile fronthaul; Applied optics. Photonics; TA1501-1820; Optics. Light; QC350-467; DML
• Online Access: https://doi.org/10.1109/JPHOT.2022.3220821; https://doaj.org/article/d851defa8ea54ce4a7f4dc0228f3e447

A bidirectional wavelength division multiplexing (WDM) analog radio-over-fiber (A-RoF) mobile fronthaul (MFH) link is enhanced using photonic integrated devices. Two key photonic integrated devices are combined in the A-RoF link: an 8-channel InP directly modulated laser (DML) transmitter and a 32&#x00D7;100-GHz silicon array waveguide grating (AWG). The DML transmitter has 8 parallel monolithically integrated distributed feedback lasers, enabling cooperative and reconfigurable downlink analog transmission. Moreover, the 32&#x00D7;100-GHz AWG is featured by low insertion loss (<4.5-dB) and low crosstalk (<&#x2212;20.4-dB), to achieve a high-density WDM system. In the distributed field experiments, we have successfully demonstrated a bidirectional A-RoF MFH over 10-km standard single mode fiber, providing an 8&#x00D7;5-Gbit&#x002F;s 4-quadrature amplitude modulation (QAM) orthogonal frequency division modulation (OFDM) downlink transmission and a 3&#x00D7;12-Gbit&#x002F;s 16-QAM uplink transmission.