The effect of strong equalization in high-speed VCSEL-based optical communications up to 48 Gbit/s

Guido Belfiore, R. Henker, F. Ellinger
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引用次数: 9

Abstract

In this paper the design of a VCSEL driver with strong equalization is presented. Unlike other published works the pre-emphasis provided from the proposed driver and the output voltage swing are independently tunable up to the saturation of the output stage (~700 mVpp in 50 Ω load environment). The driver is designed in 130 nm SiGe BiCMOS technology. Thanks to the various bandwidth extension techniques, the electrical data-rate at which the driver can operate is higher than 50 Gbit/s. A wide open optical eye diagram is measured at 48 Gbit/s with a 20 GHz VCSEL. The driver and the VCSEL consume only 188 mW from a dual voltage supply of 2.5 and 3.4 V. To the best of the authors knowledge 3.9 mW/(Gbit/s) is the highest reported energy-efficiency for a common-cathode VCSEL driver with data-rate higher than 40 Gbit/s. Moreover an open eye at 48 Gbit/s is the fastest reported for a common cathode VCSEL driver without pre-emphasis in the receiver.
强均衡在高达48 Gbit/s的高速vcsel光通信中的作用
本文介绍了一种具有强均衡性的VCSEL驱动程序的设计。与其他已发表的作品不同,所提出的驱动器提供的预强调和输出电压摆幅是独立可调的,直到输出级的饱和(在50 Ω负载环境中~700 mVpp)。该驱动器采用130纳米SiGe BiCMOS技术设计。由于各种带宽扩展技术,驱动程序可以运行的电气数据速率高于50 Gbit/s。使用20 GHz VCSEL以48 Gbit/s的速率测量了宽开式光学眼图。驱动器和VCSEL从2.5 V和3.4 V的双电压电源中仅消耗188 mW。据作者所知,对于数据速率高于40 Gbit/s的共阴极VCSEL驱动器来说,3.9 mW/(Gbit/s)是报道的最高能效。此外,在没有接收器预强调的情况下,48 Gbit/s的开眼速度是普通阴极VCSEL驱动程序报道的最快速度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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