Application research on 4-pulsed amplitude modulation in 10 Gb/s passive optical access systems

作者：Shao, Yufeng^*; Chen, Fuping; Wang, Anrong; Luo, Yingxiang; Chen, Luo

来源：Optik, 2017, 146: 63-68.

DOI：10.1016/j.ijleo.2017.08.072

• 4-PAM
• Passive optical access system
• Full-duplex
• BER

A novel scheme which can realize high-speed bidirectional optical signals transmission and reception by using 4-pulsed amplitude modulation (4-PAM) and demodulation in 10 Gb/s passive optical access systems, is introduced in this paper. In this scheme, a PAM sequence generator module, a M-ary pulse generator module and one Mach-Zehnder intensity Modulator (MZM) are employed for generating the 10 Gb/s optical 4-PAM signals. The generated optical 4-PAM signal is achieved full-duplex transmission over 20 km single mode fiber (SMF) for both downstream (DS) and upstream (US) access links application. The electrical spectrum diagrams, optical spectrum diagrams, and eye-diagrams are obtained, and the receiver sensitivities of 10 Gbis 4-PAM signals before and after bidirectional transmission are analyzed. The simulation results demonstrate that, while the 4-PAM signal is adopted in passive optical access systems as bidirectional transmission signal, it can be received effectively with the BER below the forward-error-correction (FEC) limit value.

• 出版日期2017
• 单位香港理工大学; 重庆三峡学院