25 Gb/s NRZ transmission at 85°C using a high-speed 940 nm AlGaAs oxide-confined VCSEL grown on a Ge substrate
Journal
Optics Letters
Journal Volume
49
Journal Issue
3
Date Issued
2024-02-01
Author(s)
Yang, Yun Cheng
Wan, Zeyu
Hsu, Guei Ting
Chiu, Chih Chuan
Chen, Wei Hsin
Feifel, Markus
Lackner, David
Xia, Guangrui Maggie
Abstract
In this Letter, we present a comprehensive analysis of the high-speed performance of 940 nm oxide-confined AlGaAs vertical-cavity surface-emitting lasers (VCSELs) grown on Ge substrates. Our demonstration reveals a pronounced superiority of Ge-based VCSELs in terms of thermal stability. The presented Ge-VCSEL has a maximum modulation bandwidth of 16.1 GHz and successfully realizes a 25 Gb/s NRZ transmission at 85 ◦C. The experimental results underscore the significance and potential of Ge-VCSELs for applications requiring robust performance in high-temperature environments, laying the cornerstone for the future development of VCSEL devices.
Type
journal article