1. A 25Gb/s VCSEL driver with overshoot suppression in 0.13μm SiGe BiCMOS technology.
- Author
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Guo, Chao, Chen, Yingmei, Li, Jiquan, Fan, Wentian, Zhu, En, and Xu, Jian
- Subjects
OPTICAL communications ,BIT error rate ,OPTICAL fiber communication ,SURFACE emitting lasers ,DELAY lines ,TRANSMITTERS (Communication) ,DIGITAL-to-analog converters - Abstract
An overshoot generated in the optical fiber communication system's transmitter may degrade bit error ratio performance and even damage the device. This overshoot is caused by the output capacitance of driver, the parasitic inductance of bonding wire, and vertical-cavity surface-emitting laser (VCSEL). This paper introduces a 25Gb/s VCSEL driver using a current-mode pre-equalization technique to suppress overshoot. The driver is designed in 0.13 μ m SiGe BiCMOS technology. The post-simulation results show that the pre-equalization technique applied to the driver can suppress the overshoot in the VCSEL output waveform. The measurement results show that the VCSEL driver can output an electrical eye diagram to suppress the overshoot. The core area of the VCSEL driver chip is 0.305 mm × 1.207 mm, including driver circuit, delay circuit, bandgap reference circuit, and digital-to-analog converter. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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