研究目的
Investigating the performance of a 850-nm VCSEL-based optical link with power-data rate adaptivity implemented in CMOS technologies for high-speed data transmission.
研究成果
The demonstrated optical link achieves error-free operation up to 40 Gbit/s with an energy-per-bit of 3.4 pJ/bit, making it the fastest 850-nm VCSEL-based single-lane NRZ optical link with all analog front-end components in CMOS. Power adaptivity allows reducing energy consumption at lower data rates, achieving 2.7 pJ/bit at 20 Gbit/s.
研究不足
The study is limited to 850-nm wavelength and specific CMOS technologies (14-nm FinFET for TX and 28-nm digital bulk-CMOS for RX). The performance is evaluated up to 40 Gbit/s, and the energy efficiency is compared at lower data rates.
1：Experimental Design and Method Selection:
The experiment involves designing a high-speed optical link using VCSEL and photodiode, implemented in CMOS technologies. The design includes a transmitter with a laser diode driver and a receiver with a transimpedance amplifier and limiting amplifier.
2：Sample Selection and Data Sources:
Commercial VCSEL and photodiode are used. The VCSEL operates at 850-nm wavelength, and the photodiode is a commercial 25 Gbit/s, InGaAs PD with specific characteristics.
3：List of Experimental Equipment and Materials:
Equipment includes a pseudo-random bit sequence generator, optical attenuator, sampling oscilloscope, and bit error-rate tester. Materials include multi-mode fiber and coaxial cables.
4：Experimental Procedures and Operational Workflow:
The setup involves generating a PRBS, transmitting it through the optical link, and measuring the performance in terms of bit error rate, energy-per-bit, and sensitivity.
5：Data Analysis Methods:
Performance metrics such as energy-per-bit and sensitivity are measured and compared with state-of-the-art optical links.
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