Abstract
This investigation experimentally demonstrates the dynamic characteristics of quantum dot vertical-cavity surface-emitting lasers (QD VCSEL) without and with light injection. The QD VCSEL is fully doped structure on GaAs substrate and operates in the 1.3 mum optical communication wavelength. The eye diagram, frequency response, and intermodulation distortion are presented. We also demonstrate that the frequency response enhancement by light injection technique allows us to improve the performance of subcarrier multiplexed system.
Highlights
The advantages of vertical-cavity surface-emitting lasers (VCSELs) such as lower manufacturing cost, lower threshold current, and a circular output beam have led to an important application in optical communications
We report the dynamic characteristics of 1.3 μm quantum dots (QDs) VCSEL without and with light injection
This figure clearly shows that external light injection can achieve a significant enhancement in frequency response. We demonstrated that this enhancement of the frequency response can greatly improve the performance of subcarrier multiplexed (SCM) system based on direct modulation of QD VCSELs
Summary
The advantages of vertical-cavity surface-emitting lasers (VCSELs) such as lower manufacturing cost, lower threshold current, and a circular output beam have led to an important application in optical communications. Recent progress revealed the quantum dots (QDs) can be used to fabricate long-wavelength GaAs-based VCSELs [3,4,5,6]. Dynamic characteristics of QD VCSELs without and with light injection have not yet been addressed. Light injection technique has been reported to be effective for enhancing frequency response of quantum-well VCSELs [7]. We report the dynamic characteristics of 1.3 μm QD VCSEL without and with light injection. Significant frequency response enhancement in the QD VCSEL by light injection technique has been observed. We demonstrate that this frequency response enhancement allows us to improve the performance of subcarrier multiplexed (SCM) system. We observed that the dynamic range of the QD VCSEL with light injection can be enhanced 15.1 dB for the IMD3
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
