A High-Speed and Long-Reach PAM4 Optical Wireless Communication System

作者：Li Chung Yi; Lu Hai Han; Chen Yong Nian; Su Chung Wei; Wu You Ruei; Wang Zhen Han; Lin Ying Pyng

来源：IEEE Photonics Journal, 2018, 10(4): 7906109.

DOI：10.1109/JPHOT.2018.2859321

• Doublet lenses
• MZM-OEO BLS
• Optical wireless communication system
• PAM4

A high-speed (400 Gb/s) and long-reach (180 m) four-level pulse amplitude modulation (PAM4) optical wireless communication system employing Mach-Zehnder modulator (MZM)-optoelectronic oscillator (OEO) broadband light source (BLS) and doublet lenses is proposed. Analytic results show that the data rate is markedly improved by PAM4 modulation and MZM-OEO BLS with multiple wavelengths, and the free-space transmission distance is considerably increased by a couple of doublet lenses. With the support of PAM4 modulation, MZM-OEO BLS, and doublet lenses, good bit error rate performance and clear PAM4/nonreturn-to-zero eye diagram are achieved at a 400 Gb/s/180 m operation. The proposed system is presented to be an eminent one not only as a result of its evolution in free-space optical (FSO) links, but also on account of its high-speed and long-reach characteristics in FSO links.

• 出版日期2018-8