Laser & Optoelectronics Progress, Volume. 58, Issue 21, 2106004(2021)
Architecture of Reconfigurable Transmitter Integrated Circuits for Four-Level Pulse Amplitude Modulation Optical Interconnection System
Linear and nonlinear channel distortion could degrade the performance of short reach optical interconnection system based on four-level pulse amplitude modulation (PAM4). Using PAM4 transmitter integrated circuits to pre-compensate the signal can alleviate the impact of channel distortion. This paper studies the architecture of PAM4 transmitter chip suitable for short reach optical interconnection. The architecture is based on look-up table (LUT) equalizer and source series terminated digital-to-analog converter, which can flexibly compensate the optical channel distortion. The pipelined multiplexer is used for high speed LUT reading. Digital-to-analog converter pre-driver circuit with feedback resistance is used to decrease the inter-symbol-interference. The post simulation results show that the PAM4 transmitter integrated circuits based on 55 nm process is able to reach 40 Gbit/s. It also enables reconfigurability of various types of equalizers and meets the requirements of next generation data center, access and other optical interconnection networks.
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Zhiqiang Chen, Linghao Cheng, Yuan Bao, Dawei Liu, Jianlin Fan, Zhitao Chen. Architecture of Reconfigurable Transmitter Integrated Circuits for Four-Level Pulse Amplitude Modulation Optical Interconnection System[J]. Laser & Optoelectronics Progress, 2021, 58(21): 2106004
Category: Fiber Optics and Optical Communications
Received: Jan. 22, 2021
Accepted: Mar. 10, 2021
Published Online: Nov. 17, 2021
The Author Email: Chen Zhiqiang (mac10242021@163.com), Bao Yuan (baoyuan@gdisit.com)