PhD Seminar Notice: Broadband driver design for optical high-speed data centre interconnecting systems

Tuesday, November 5, 2024 3:00 pm - 4:00 pm EST (GMT -05:00)

Candidate: Ray Cui

Date: November 5, 2024

Time: 3:00 PM

Location: E5 5047   

Supervisor: Long, John

Abstract:
This development of a high-speed broadband driver prototype for optical data centre interconnects is presented. The application requires high data throughput with low power consumption.
 
The focus is on the multi-stage modulator driver and double-series peaking network designs for coherent optical transmission at data rates exceeding 400 Gb/s per wavelength. Key design considerations include: achieving 90-GHz bandwidth and 4-Vppd linear output swing, with minimal DC power consumption for efficient operation. The driver employs new circuit configurations, such as a Class-A output stage with intermodulation distortion cancellation to enhance linearity across frequencies. The design methodology for the double-series peaking network is summarized, demonstrating amplitude peaking and bandwidth extension. Areas for further optimization, including temperature stability and adaptive gain control are also outlined.

A collaboration with industry partners that has supported the design of a 4-channel driver for coherent optical communications using polarization modulation is also described briefly.