Photonics Research, 2020, 8 (11): 11001776, Published Online: Oct. 28, 2020  

800 Gbit/s transmission over 1 km single-mode fiber using a four-channel silicon photonic transmitter Download: 861次

Author Affiliations
1 National Information Optoelectronics Innovation Center, China Information and Communication Technologies Group Corporation (CICT), Wuhan 430074, China
2 State Key Laboratory of Optical Communication Technologies and Networks, China Information and Communication Technologies Group Corporation (CICT), Wuhan 430074, China
3 Accelink Technologies Co., Ltd., Wuhan 430205, China
4 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
5 Center of Material Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
6 e-mail: xxiao@wri.com.cn
7 e-mail: qinan@semi.ac.cn
Abstract
We demonstrate the optical transmission of an 800 Gbit/s (4×200 Gbit/s) pulse amplitude modulation-4 (PAM-4) signal and a 480 Gbit/s (4×120 Gbit/s) on–off-keying (OOK) signal by using a high-bandwidth (BW) silicon photonic (SiP) transmitter with the aid of digital signal processing (DSP). In this transmitter, a four-channel SiP modulator chip is co-packaged with a four-channel driver chip, with a measured 3 dB BW of 40 GHz. DSP is applied in both the transmitter and receiver sides for pre-/post-compensation and bit error rate (BER) calculation. Back-to-back (B2B) BERs of the PAM-4 signal and OOK signal are first measured for each channel of the transmitter with respect to a variety of data rates. Similar BER performance of four channels shows good uniformity of the transmitter between different channels. The BER penalty of the PAM-4 and OOK signals for 500 m and 1 km standard single-mode fiber (SSMF) transmission is then experimentally tested by using one channel of the transmitter. For a 200 Gbit/s PAM-4 signal, the BER is below the hard-decision forward error correction (HD-FEC) threshold for B2B and below the soft-decision FEC (SD-FEC) threshold after 1 km transmission. For a 120 Gbit/s OOK signal, the BER is below SD-FEC threshold for B2B. After 500 m and 1 km transmission, the data rate of the OOK signal shrinks to 119 Gbit/s and 118 Gbit/s with the SD-FEC threshold, respectively. Finally, the 800 Gbit/s PAM-4 signal with 1 km transmission is achieved with the BER of all four channels below the SD-FEC threshold.

Hongguang Zhang, Miaofeng Li, Yuguang Zhang, Di Zhang, Qiwen Liao, Jian He, Shenglei Hu, Bo Zhang, Lei Wang, Xi Xiao, Nan Qi, Shaohua Yu. 800 Gbit/s transmission over 1 km single-mode fiber using a four-channel silicon photonic transmitter[J]. Photonics Research, 2020, 8(11): 11001776.

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